CDL Practice Question Directory
Browse all 1004 practice questions in our comprehensive database.
General Knowledge
1. To prevent a load from shifting, there should be at least one tie down for every ____ feet of cargo.2. You are driving a 40-foot vehicle at 35mph. The road is dry, and visibility is good. What is the least amount of space you should keep in front of your vehicle to be safe?3. Which of these statements about drinking alcohol is true?4. While driving, ice builds up on your wipers and they no longer clean the windshield. You should:5. Which of these statements about driving in areas with strong winds is true?6. What is counter-steering?7. To help you stay alert while driving, you should:8. You do not have a Hazardous Materials Endorsement on your Commercial Driver's License. You can drive a vehicle hauling hazardous materials when:10. Retarders:11. You are driving a new truck with a manual transmission. What gear will you probably have to use to take a long, steep downhill grade?12. Which of these statements about speed management is true?13. Which of these best describes how you should use the brake pedal on a steep downhill grade?14. Which of these statements about double clutching and shifting is true?15.Which if these statements about using turn signals is true?16. Which of these statements about cargo loading is true?17. If your vehicle catches fire while you are driving, you should:18. You are checking your tires for a pre-trip inspection. Which of these statements is true?19. You can see a marking on a vehicle ahead of you. The marking is a red triangle with an orange center. What does the marking mean?20. An en route inspection should include checking for:21. You are driving in the right lane of a four-lane, undivided road. You come over a hill and find a car stopped ahead in your lane. You do not have room to stop. The hill blocks your view to the rear. The shoulder is clear. Which of these is most likely?22. Where or when should you test the stopping action of your service brakes?23. Which of these is not part of the pre-trip inspection of the engine compartment?24. Cargo covers:25. High beams should be:26. Which of these is the most important thing to remember about emergency braking?27. You must park on the side of a level, straight, two-lane road. Where should you place the reflective triangles?28. The road you are driving on becomes very slippery due to glare ice. Which of these is a good thing to do in such a situation?29. Which of these statements about tires and hot-weather driving is true?30. Your truck is in a traffic emergency and may collide with another vehicle if you do not take action. Which of these is a good rule to remember at such a time?31. What should you do when your vehicle hydroplanes?32. You are starting your vehicle from a stop. As you apply power to the driver wheels, they start to spin. You should:33. Stab Braking:34. It takes the body about _____ hours to get rid of the alcohol in four drinks.35. Cargo that can shift should have at least ____ tie-downs.36. If a straight vehicle (no trailer or articulation) goes into a front-wheel skid, it will:37. Which of these statements about accelerating is true?38. Which of these is a good thing to remember when crossing or entering traffic with a heavy vehicle?39. Which of these statements about staying alert to drive is true?40. You are driving on a two-lane road. An oncoming driver drifts into your lane and is headed straight for you. Which of these is most often the best action to take?41. Which of these statements about engine overheating is true?42. You are driving a truck with a manual transmission. You have to stop the truck on the shoulder while driving on an uphill grade. Which of these is a good rule to follow when putting it back in motion up the grade?43. A vehicle is loaded with most of the weight on the steering axle. What may result?44. You are driving a 40-foot vehicle at 50 mph. Driving conditions are ideal (dry pavement, good visibility). What is the least amount of space that you should keep in front of your vehicle to be safe?45. Which of these things is a good thing to do when steering to avoid a crash?46. You are checking your wheels and rims for a pre-trip inspection. Which of these statements is true?47. You do not have a Hazardous Materials Endorsement on your Commercial Driver's License. You are asked to deliver hazardous material in a placarded vehicle. You should:48. As the Blood Alcohol Concentration (BAC) goes up, what happens?49. If you need to leave the road in a traffic emergency, you should:50. Which of these statements about downshifting for a long downhill grade is true?51. When looking ahead of your vehicle while driving you should look:52. Escape ramps are:53. Which of these statements about cold-weather driving is true?54. When should you wear seat belts?55. Controlled braking:56. How do you correct a rear-wheel acceleration skid?57. Which of these is NOT a good rule to follow when caring for injured at an accident scene?58. For your safety, when setting out reflective triangles you should:59. Heavy vehicles must sometimes travel more slowly than other traffic. Which of these is NOT a good rule to follow when you are driving such a vehicle?60. The most important reason for being alert to hazards is so:61. Hydroplaning:62. If you are being tailgated, you should:63. Which of these statements about overhead clearance is true?64. Which of these is a good rule to follow when using a fire extinguisher?65. While driving, you see a small (1-foot square) cardboard box ahead in your lane. You should:66. Is it legal to drive with one fourth of a vehicle's leaf springs broken or missing?67. Which of these can cause a fire?68. Dry bulk tanks and hanging meat:69. Which of the following should you NOT do in the event of hydraulic brake failure?70. To correct a drive-wheel braking skid you should:71. Which of the following statements about tank vehicles is true?72. If you are driving a long distance, you should:73. Which of the following is true about a vehicle with a high center of gravity?74. To prevent skidding, you should:75. You should back and turn toward the driver's side:76. When you check the condition of visible parts during your pretrip inspection, make sure that they are secured against snagging, rubbing or wearing.77. With a BAC of _, most people lose consciousness, and some die. a. .40 b. .16 c. .1078. The distance your vehicle travels from the time your eyes see a hazard until your brakes recognize it is called:79. Which of these items is checked in a pre-trip inspection?80. The 'reaction distance' is the distance traveled from the time:81. When driving a commercial vehicle with a height over 13 feet, you should:82. The purpose of a baffle is to:83. The new BAC (Blood Alcohol Concentration) for commercial drivers to be considered intoxicated when driving a commercial vehicle is:84. Truck escape ramps:85. Which of these can cause the vehicle to skid?86. Which of these describes how you should use the brake pedal on a steep downhill grade?87. An en-route inspection should include checking:88. According to the driver's manual, why should you limit the use of your horn?89. The amount of liquid to load into a tank depends on:90. You should use your mirrors to check:91. Your brakes can get wet when you drive through a heavy rain. What can this cause when the brakes are applied?92. Which of these statements about using mirrors is true?93. To avoid a crash, you had to drive onto the right shoulder. You are now driving at 40 MPH on the shoulder. How should you move back onto the pavement?94. Which of these statements about managing space is true?95. You are testing the stopping action of service brakes on a hydraulic system. Which of these can mean there is a problem?96. The distance that you should look ahead of your vehicle while driving amounts to about _____ at highway speed.97. Which of these statements about drinking alcohol is true?98. On which fires can you use the 'ABC' fire extinguisher?99. Which of these is a proper use of vehicle lights and flashers?100. Which of these tell you that cargo contains hazardous materials?101. If you are convicted for driving under the influence while driving a commercial vehicle, and this is your first offense, you will most likely get:102. Some liquid tanks are divided into several smaller tanks by:103. Front-end header boards:104. The height of the vehicle center of gravity is very important for safe handling. A high center of gravity means you are more likely to:105. The 'load' means the following?106. Whether or not you load and secure your load yourself, you are responsible for:107. Which of these statements about downshifting for a long downhill grade is true?108. Medical certificates must be renewed every:109. During a pre-trip inspection you discover an exhaust leak or power steering leak, you should:110. During what time in your pre-trip inspection of a school bus do you check the back emergency door? (to ensure it is closed.)111. Inspect your cargo after you have driven:112. Axle weight means the following?113. Blocking your cargo to keep it from sliding must be done at the:114. Over-length, over-width, and/or overweight loads require:115. Turn signals should be used:116. Which of these statements about speed management is true?117. You are driving on a straight, level highway at 50 mph. There are no vehicles in front of you. Suddenly a tire blows out on your vehicle. What should you do first?118. Which of these will help keep an engine cool in hot weather?119. When a vehicle is carrying a load at night, which extends four feet or more beyond the rear of the body, there must be at the extreme end of the load.120. When checking the bus seats, what are you looking for?121. You must inspect your cargo:122. Tie downs must be of the proper type and strength. The combined strength of cargo tie downs must be strong enough to lift:123. Which of these is important to check before driving in the winter?124. Tank vehicles are used to carry any liquid and are dangerous to drive because:125. Gross Vehicle Weight Rating (GVWR) means the following?126. Gross Vehicle Weight (GVW) means the following:127. Prior to driving, what are some of the items you should check the interior of the bus for?128. How far can the board of education make a student walk to their assigned pick up location?129. There are three types of vehicle inspections, which of these is one of them?130. You are checking your brakes and suspension system for a pre-trip inspection. Which of these statements is true?131. You must park on the side of a level, straight, four-lane, divided highway. Where should you place the three reflective triangles?132. Which of these is a good driving rule for work zones?133. Under loaded front axles can cause the following:134. Dry bulk tanks require special care because:135. Overloading can have a bad effect on?136. No matter how small the cargo is, it should have at least:137. As part of your pre-trip inspection, you must:138. Which item below lists almost all or all the emergency equipment that is required on a school bus?139. Cargo that is not loaded or secured properly can cause many problems. Which of these statements is true?140. You must drive on a slippery road. Which of these is a good thing to do in such a situation?141. Brake 'fade':142. The biggest problem with a broken exhaust system is that it may let poison fumes into the vehicle's cab.143. What is the most important reason for doing a vehicle inspection?144. You should have a minimum of tread on your steering tires.145. When taking a break in the middle of your trip, you should check:146. Which of these is correct regarding brake shoes:147. What items should be checked for safety on the steering column?148. Measuring BAC (Blood Alcohol Concentration) is done by measuring a person's:149. Your truck has a dual air system and one of the systems loses its pressure. What will happen?150. When getting in to start the engine and inspect inside the cab you must:151. When preparing to do a pre-trip inspection you must check to see that the parking brakes are on and/or chocked.152. The oil pressure gauge should come up to normal within how long after starting the engine?153. You should check the following for looseness, sticking, damage, or improper settings:154. After inspecting mirrors and windshields for cracks, dirt, and illegal stickers, or other obstructions to your vision, you should:155. When checking lights you should:156. What should the wheel bearing seals be checked for?157. How many red reflective triangles should you carry?158. How do you test the hydraulic brakes for leaks?159. Why put the starter key in your pocket during the pre-trip inspection?160. To avoid rollbacks when you start, you should:161. What is the proper way to hold the steering wheel?162. Why should you back towards the driver's side?163. When backing, why is it important to use a helper?164. What is the most important hand signal you and your backing helper should agree on?165. What are two special occasions where you should downshift?166. When should you downshift automatic transmissions?167. Retarders keep you from skidding where the road is slippery.168. What are two ways to know when to shift?169. How far ahead should you look?170. What are the two main things to look for ahead?171. What is your most valuable way to see the sides and rear?172. What does 'communicating' in mean in safe driving?173. If you go twice as fast your stopping distance will increase by:174. Empty trucks have the best braking.175. What is hydroplaning?176. What is black ice?177. If the vehicle in front of you is smaller than yours, it can probably:178. If you are driving a 30 foot vehicle at 55 mph, how many seconds of following distance should you allow?179. If you swing wide to the left before turning right another driver may try to pass you on your right.180. You should use low beams whenever you can.181. What should you do before driving if you are sleepy?182. What effects can wet brakes cause?183. How can you avoid wet brake problems?184. You should let air out of hot tires so the pressure goes back to normal.185. You can safely remove the radiator cap as long as the engine isn't overheated.186. What factors determine your selection of 'safe' speed when going down a long steep downgrade?187. Why should you be in the proper gear before starting down a hill?188. What is a hazard?189. Why make emergency plans when you see a hazard?190. What are some advantages of going right instead of left around an obstacle?191. Stopping isn't always the safest thing to do in an emergency.192. What is an 'escape ramp'?193. What are some things to do at an accident scene to prevent another accident?194. Name two causes of fires:195. Which of these can cause the vehicle to skid?196. You are driving a vehicle that could safely be driven at 55 mph on an open road; but traffic is now heavy, moving at 35 mph, although the speed limit is 55. The safest speed for your vehicle in this situation is most likely:197. Every time you park your vehicle and shut the engine off you should:198. For an average commercial vehicle being driven at 55 mph on dry pavement it will take about _______ to bring the vehicle to a stop.199. Which of these statements about certain types of cargo is true?200. Which of the following statements about backing is true?201. The most common cause of serious vehicle skids is:202. The parking brake should be tested while the vehicle is:203. A driver's trip log if required:204. When should the pre-trip inspection report from the last driver be reviewed?205. If you are stopped at a rest area and found to have a BAC (Blood Alcohol Concentration) of .02 you will:206. How far ahead should you be looking while driving in town?207. How does 'bleeding tar' effect the road surface and driving conditions?208. Converter dollies built on or after March 1, 1998 are required to have anti-lock brakes. These dollies will have:209. What is the minimum length for mud flaps?210. How long does it take a typical tractor trailer to clear a single track? A double track?211. What is the definition of 'sleep debt'?212. Name some important steering system parts:213. What is the minimum tread depth for front tires?214. When using your fire extinguisher you should get as close to the fire as possible.215. Name some things you should check on the FRONT of your vehicle during your pre-trip inspection:216. Why are placards used?217. Name some suspension system defects:218. What is the minimum tread depth for tires other than front tires?219. How can you avoid the effects that wet brakes can cause?220. What things should you check during a trip?221. Why should you be in the proper gear before starting down a hill?222. What is an advantage of going right instead of left around an obstacle?223. Name two situations where legal maximum weights may not be safe to haul:224. What three things related to cargo are the driver's responsibility?225. What is a hazardous materials placard?226. What must you check before transporting a sealed load?227. How do you calculate how many seconds of following distance space you have?228. What is a 'pull-up'?229. What should wheel bearing seals be checked for?230. Select the proper collision procedures that are required for any collision that you are involved in; in which you are not seriously injured.231. The tendency for long commercial vehicles to swing wide on turns is called:232. What should you do if you get stuck on the railroad tracks?233. Which of these is a good thing to remember about drinking alcohol?234. Which of these statements is true about medicines used to treat the common cold?235. The total weight of the powered unit, the trailer, and the cargo is called:236. Which piece of emergency equipment should be in your vehicle?237. Which of these statements is true about causes of vehicle fires?238. Which of these statements is true about vehicle fires?239. Which of these statements is true about brakes?240. Which of the following does not provide extra gears on some trucks?241. Which of these Is not a danger when an automatic transmission is forced into a lower gear at a high speed?242. Which of these statements is true about backing heavy vehicles?243. The distance you should look ahead while driving at highway speeds.244. The Commercial Driver's Handbook suggests several things to do when you pass a vehicle. Which of these is NOT one of them?245. Which of these statements is true about speed management?246. You are driving a heavy vehicle and must exit a highway using an off-ramp that curves downhill. You should:247. Which of these is a good thing to do when driving at night?248. Which of these is NOT something you should do if your headlights are not working properly?249. When roads are slippery you should:250. You should avoid driving through deep puddles or flowing water but if you cannot, which of these steps can help keep your brakes working?251. Which of these is true about the radiator shutters and the winterfront?252. Which of these statements is NOT true about engine belts in hot weather?253. What should you do if you see a hazard in the roadway?254. A car suddenly 'cuts' in front of you creating a hazard. What should you NOT do?255. Your vehicle has hydraulic brakes. When traveling on a level road, you press the brake pedal and find that it goes to the floor. Which of these statements is true?256. Bridge formulas permit:257. You are checking your steering and exhaust systems in your pre-trip inspection. Which of these problems should be fixed before the vehicle is driven?258. Which of these items is NOT checked on a pre-trip inspection?259. One can recognize hazardous materials by looking at the container's:260. If you must stop on a hill in a two-way, two-lane road. How far back should you place your reflective triangles?261. Which of these is true about hours of service?262. You should try to park your vehicle so:263. Which of these is NOT a proper use of vehicle lights?264. Which of the following is NOT a type of retarder?265. What is the first thing you should try to do if your brakes fail while driving downhill?266. When you drive in the mountains, you will have to use lower gears to drive safely down grades. Which of these does NOT affect your choice of gears?267. Which of these is NOT caused by rough acceleration?268. Which of the following statements is true?269. Which of the following may be a sign of tire failure?270. Which of these statements is NOT true?271. Optional safety equipment may include emergency phone numbers, tire chains, and:272. The braking effect of the engine is greatest when the engine is _ the governed RPM's and the transmission is in the — gears.273. The best drivers are those who watch and prepare for hazards. This is called being:274. What will help keep an engine cool in hot weather?275. Which of these statements is true regarding the use of drugs while driving?276. Which of these statements is true about warning other drivers of a stopped vehicle?277. If you have a heavy load that is slowing you down on an upgrade you should:278. Which of these statements is NOT true about backing a heavy vehicle?279. In your mirror you see a car approaching from the rear. The next time you check your mirror you don't see the car. To change lanes you should:280. What should you do if a car coming towards you at night keeps its high beams on?281. Which of these is especially true about your tires in hot weather?282. When driving through roadway work zones, you should:283. Which of these statements is true about bad weather driving conditions?284. Which of these statements is true about other drivers?285. Which of these will happen if a tire blows out at highway speeds?286. To prevent 'brake fade' you should:287. If you have been drinking alcohol, before you drive, you should:288. Which of the following best describes how sleep debt can be paid off?289. Which of these statements is true about drugs?290. 'Implied consent' means when you sign the driver's license application form, you:291. You should use your mirrors to check:292. Convex curved mirrors:293. The purpose of retarders is to:294. It is important to shift gears correctly to keep:295. A helper should be used to help back your vehicle:296. You should signal continuously while turning because:297. When approaching a traffic light that has been green for a long time, you should:298. What three things add up to total stopping distance for your truck or bus?299. If you cannot see well with your headlights when driving in an area with few streetlights on a clear night, you should:300. When driving at night, use your low beams when an oncoming vehicle is within:301. If your brakes get wet while driving on a rainy day, what can happen when you apply the brakes?302. Which of these is a danger of crossing railroad tracks on dirt roads?303. A key principle to remember about loading cargo is to keep the load:304. Containerized loads:305. Can federal inspectors inspect your truck or bus?306. Which of these is NOT required knowledge for drivers needing HAZMAT endorsement?307. When driving on grades, which of these is the best choice for a safe speed?308. Trucks and buses are subject to certain laws, restrictions, and regulations. Which of these statements is true?309. When a doctor prescribes medication for you and you know you will be driving, you should:310. You should schedule your driving:311. Stab braking should not be used on vehicles with:312. *If you do not have a CB radio, what is the first thing you should do at an accident scene?313. When driving in cold weather conditions, your tire tread should:314. When you are passing another vehicle, pedestrian, or bicyclist you should assume that they:315. Which of the following cannot be checked at the same time:316. Cargo Inspections:317. *Allowing for lawful exceptions, maximum legal height of any vehicle is:318. Allowing for permitted exceptions, the maximum length for a single vehicle is:319. If you drive for an employer who transports cargo intrastate (California) only, you may not drive for more:320. A driver's trip log, in duplicate if required, must be kept by each driver and co-driver while:321. Which of these problems, if discovered while checking your steering exhaust system, must be fixed before driving the vehicle?322. Which of these is NOT a part of the pre-trip engine compartment inspection?323. It is raining, and you are stopped at a traffic signal. When the light turns green you apply power to the drive wheels, and they start to spin. You should:324. It is best to signal at least325. You have a vehicle emergency, and you are parked on the side of an undivided highway. You should place your reflective triangles within326. For safety reasons, you should327. Which of these tips about speed management and braking is true?328. You are passing a vehicle going 25 mph on a grade. Your passing speed should be at least and you must complete this pass in329. Hydroplaning can happen:330. You are driving an 80-foot vehicle at 45 mph in good weather conditions. The least amount of space that you should keep in front of your vehicle to be safe is:331. Which of these statements about crossing traffic with a large vehicle is true?332. Which of these statements about tires and very hot weather driving is true?333. Which of the following is a proper braking technique once the vehicle is in low gear?334. A hazard ahead may cause your vehicle to collide with another if you do not take action. You should remember that:335. You are driving a bus, and it goes into a front wheel skid, the vehicle will:336. Which of these should you NOT do when caring for an injured person at a collision scene?337. Inspect your cargo after you have cooled:338. Which of these statements about alcohol is true?339. Where must the shipping papers be for a vehicle placarded for hazardous material?340. The maximum weight rating specified by the manufactured for a single vehicle including its load is the ?341. Rules governing the loading and securing of cotton, jute, lumber products, and other specialized cargos are contained in:342. A load that extends to the left must have an amber light on the external left side if it extends:343. Commercial drivers must notify their employer of any out-of-state conviction:344. What are the three types of vehicle inspections?345. The posted speed limit is 65 mph. A vehicle transporting explosives may legally drive no faster than ____ mph, weather conditions permitting.346. You are checking your tires during your pre-trip inspection. Which of these statements is true?347. Which of these statements about checking your suspension system is true?348. Which of these statements about vehicle fires is true?349. It is illegal to drive a commercial motor vehicle with a BAC this high, even though a BAC below the level does not mean it is safe to drive.350. Maximum axle weight is usually set by a _____ formula.351. Which of these is true regarding brake shoes?352. If the drive wheels have poor traction, retarders may cause:353. The key principle in balancing cargo weight is to keep the load:354. The California Driver Handbook suggests that you limit the use of your horn why?355. Measured from the road surface, the maximum legal height of any vehicle and load not needing a permit is:356. When no signs are posted on a three-lane highway, a school bus transporting pupils must drive in _____ lane, except when passing, turning, or leaving the highway.357. Unless your employer requires immediate notice, California law states that you have _____ days to notify your employer of a collision in the employer's vehicle.358. The vehicle's parking brake should be tested when the vehicle is:359. Retarders are used to:360. If you are towing a vehicle with a load that blocks your view to the rear, you must have:361. Which of these statements about marking a stopped vehicle is true?362. If you must stop in the road, you should put your reflective triangles within _____ minutes:363. What should you do if the road you are driving becomes icy?364. Which of these statements about stopping distance and braking speed is true?365. The most important space around your vehicle is the space:366. You want to make a left turn and there are two left turn lanes. You will be turning into a street with two lanes in each direction. You should:367. Water on the brakes can cause:368. The safest way to keep brakes from getting too hot while going downhill is to:369. Which of these statements about quick steering movements is true?370. Which of these is the most important thing to remember about emergency braking?371. A vehicle transporting hazardous materials must place signboards on _____ sides.372. If a vehicle is loaded with too much weight on the steering axle, what can happen?373. A second conviction for operating a commercial vehicle under the influence of alcohol will result in a:374. Drivers must have a peace officer's authorization to change from a permitted route when _____ transporting:375. Which of these statements about checking your wheels and rims is true?376. Before you drive a vehicle that has been released for service by the maintenance mechanic, you should:377. Commercial drivers should inspect their vehicle within the first _ miles and then:378. What are some things to do at an accident scene to prevent another accident?379. You should test the stopping action of your service brakes by allowing the vehicle to:380. You are backing a large vehicle. You should:381. Using your mirrors correctly means that you:382. The service brakes of a bus must be capable of stopping from an initial speed of 20 mph within a maximum stopping distance of:383. Which of these statements about certain types of cargo is true?384. Vehicles traveling over 40 mph should allow an extra vehicle ahead of space between you and the:385. When you drive at night you should:386. Which of these statements about driving in areas with strong winds is true?387. If a vehicle is loaded with too little weight on the drive axles, what can happen?388. What is counter steering?389. A skid happens whenever the tires:390. Which of these statements about cargo loading is true?392. When a coolant container is part of a pressurized system, which of these is true?393. You should avoid driving through deep puddles or flowing water. But if you must, which of these steps can help keep your brakes working?394. Which of the below is NOT a characteristic of a front tire failure?395. Why will your vehicle's speed naturally increase on downgrades?396. Which of these pieces of emergency equipment should be carried in your vehicle?398. You should signal continuously while turning because:399. Most serious result from:400. When you are parked at the side of the road at night, you must:401. You do NOT have the hazmat endorsement on your commercial driver's license. You can drive a vehicle hauling hazardous materials when:402. In your mirror, you see a car approaching from the rear. The next time you check your mirror, you do not see the car. You wish to change lanes, you should:403. Whenever you double your speed, your vehicle has about_____ times the destructive powers if it crashes.404. You are driving a new truck with a manual transmission. What gear will you probably have to use to take a long, steep downhill grade?405. What should you do if you are unsure whether you have enough overhead clearance?406. You are driving a heavy vehicle. You must exit a highway that uses an off-ramp that curves downhill. You should:407. You are driving a vehicle at 55 mph on dry pavement. About how much total stopping distance will you need to bring it to a stop?408. On which fires can you use water?409. What is the term for a commercial vehicle's habit of swinging wide on turns?410. Which of the following statements about backing is true?411. Which of these statements about double clutching and shifting is true?412. One reason that dry bulk tanks require special care is:413. 'Perception Distance' is the distance your vehicle travels from the time:414. What is the first thing you should try to do if your brakes fail while driving downhill?415. Which of these may be a sign of tire failure?416. What should you do before driving in mountains?417. Which of these statements about shipping hazardous materials is true?418. Which of these systems should receive extra attention during a winter weather inspection?419. Truck escape ramps:420. If someone is following you too closely (tailgating), you should:421. You are performing a pre-trip inspection on your brakes and suspension system. Which of these statements is true?422. Which of these is NOT a part of the engine compartment pre-trip inspection?423. You are required to stop at a railroad grade crossing when:424. Which of these items should be tested when the vehicle is stopped?425. Most serious skids result from:426. Which of these statements is true about mirror adjustment?427. For a first offense of driving a commercial vehicle under the influence of alcohol or drugs, you will lose your CDL for at least:428. You must complete a written vehicle inspection report each day. You must sign the report:429. Placards must be:430. Why is a broken exhaust system dangerous?431. If you have a heavy load that is slowing you down on an upgrade, you should:432. Which of these is a good thing to do when steering to avoid a crash?433. How far should a driver look ahead of the vehicle while driving?434. The engine braking effect is greatest when the engine is _____ the governed RPM and the transmission is in the_____gears.435. Retarders:436. Which of these is the proper way to signal to change lanes?Cargo being transported should be checked:What must be done if a load extends four or more feet beyond the rear of a truck?How many daily hours of sleep does an adult need to maintain alertness?A tread depth of ____ should be in every major groove of a front tire.A tread depth of ____ should be in every major groove of a tire that is not in the front of a commercial motor vehicle.If one-fourth of the leaves in a leaf spring are missing when a vehicle is inspected:A broken exhaust system:A pre-trip inspection:When approaching a vehicle for a pre-trip inspection, a driver should look under the vehicle:A pre-trip inspection should include:When starting the engine of a truck with a trailer, you can tell that your vehicle's ABS is not working if:When starting an engine, oil pressure should come up to a normal level:How can you check for a leak in hydraulic brakes?When stopping a manual transmission vehicle, you should:When backing with a trailer, you should begin by:When backing up, follow a turning trailer by:If you remain in neutral for too long while switching gears:Scan the road ____ ahead of your vehicle.You should check and adjust your mirrors:When adjusting your mirrors before a trip:To warn drivers behind you that you will be slowing down, you should:When it is difficult to see and you are traveling near other drivers, you should:When driving on a wet road, you should reduce your speed by:When driving on packed snow, you should reduce your speed by:You should maintain at least ____ of following distance per every 10 feet of your vehicle when you are traveling more slowly than 40 mph.If you are turning left at an intersection where there are two available turn lanes:Slow down and be extra careful:Texting while driving is especially dangerous because:In cool weather, as the temperature begins to rise and ice begins to melt:In hot weather, spots on the pavement where tar is bleeding:When near a railroad crossing:When approaching a railroad crossing, you should:What should you do if your vehicle gets stuck on railroad tracks?To avoid a hazard, you:If a tire fails, you should:After an accident, flares should be used with caution because:If you have an engine fire, you should:When trying to put out an electrical fire, you should:If you’re not sure what to do to extinguish a fire in your vehicle, you should:When using a fire extinguisher on a fire, you should:You may not consume alcohol within ____ of going on duty.The only way to sober up after consuming alcohol is to:If a vehicle is carrying hazardous cargo, placards must be placed:Who is responsible for ensuring cargo is loaded properly?When loading cargo, it is important to:Cargo should be covered:Laws about securing loads and regulating CMV weights may vary from state to state. During interstate travel:When loading cargo, weight should be placed:Who is responsible for inspecting a vehicle's cargo?Loading cargo onto a vehicle:What is the Gross Vehicle Weight Rating (GVWR)?If transporting 30 feet of cargo on a flatbed trailer, you should use a minimum of ____ to restrain the cargo.A poor balance of weight in a trailer:You should always use at least ____ to secure cargo on a flatbed trailer.Bracing is used to:An item that is 40 feet long placed on a flatbed trailer should be secured by at least ____ tie-down(s).If transporting livestock, drivers should be concerned about:A truck may need to be under the legal maximum weight limit when being driven:Too little weight on a steering axle can result in:Dry bulk tanks require special care because:You should cover cargo:When carrying a sealed load, the driver:A second conviction of operating a CMV with a minimum blood alcohol concentration (BAC) of 0.04 percent will result in:While still below the legal limit, a driver operating a CMV with a detectable amount of alcohol in their system will:If you are disqualified from driving:While operating a CMV:It is illegal to operate a CMV with a minimum blood alcohol content (BAC) of:If asked by a law enforcement officer to take a test to determine your blood alcohol concentration (BAC):Your CDL will be revoked if:If convicted of a traffic violation, you must inform your employer:While driving a CMV:During the steering box portion of the vehicle inspection test, you should not:When performing a pre-trip inspection and looking into the fifth wheel gap, you should:Move over laws require:Emergency equipment in a vehicle is:Mirror adjustment can only be checked properly if:If unable to tell if the road is becoming icy and slippery, a driver:What happens when a vehicle hydroplanes?A cardboard box on the roadway:A stopped bus:Headlights:What is road rage?Black ice is:Before entering a curve, you should:When driving, it is important to:When making a turn, when should you cancel your turn signal?The maximum amount of play that is safe on a 20-inch steering wheel is:If you identify a distracted driver on the road, you should:When conducting a pre-drive inspection:In low temperatures, bridges usually freeze:If being tailgated, you should:If a vehicle is equipped with power steering, the hoses should be checked:You will often have to drive your vehicle under bridges and overpasses. If approaching such an opening, you should:A ramp's posted speed limit:Parked delivery trucks may be hazardous because:How do ice cream trucks become hazardous to other drivers?When a vehicle is started, warning lights and buzzers:After two violations of any state law regarding hand-held mobile phone use:One way to avoid becoming an aggressive driver is to:When passing another vehicle, you should:One way to prevent drowsiness while driving is to:If driving so slowly that you could impede other drivers, you should:If driving through flowing water or a large puddle, you should:What is the best way to stop if your brakes fail while you are driving downhill?What are placards?Distracted driving:If a driver has stopped on the road and is placing triangles to warn other motorists:What is reaction distance?When passing a row of parked vehicles, a driver should:When backing with a trailer, turning toward the driver’s side is encouraged because:In very hot weather, tires should be checked regularly because:When driving:The most important reason to inspect your vehicle before a trip is:If you must stop on the side of a highway, how far behind your vehicle should warning devices be placed?In an emergency, if you must leave the roadway to drive on the shoulder, you should:When inspecting a power steering-equipped vehicle, you should be sure that:Accelerating roughly is:When stopping:If you must drive in reverse, it is helpful to:Dual tires should:Most heavy vehicles require ____ to change gears.The two indicators that determine when you should upshift are:Leaking shock absorbers:If you need to travel down a hill, you should switch into a lower gear:For safety purposes, when should you turn off a retarder?When checking your vehicle's lights before driving:When testing a parking brake, the vehicle should:When parked on the side of the road, you should:If driving a vehicle with a manual transmission, you can prevent your vehicle from rolling backward when starting from a stop by:How does doubling your speed from 20 mph to 40 mph affect your vehicle's braking distance?When backing, it is best to:A truck should be parked:When using your mirrors, you should frequently look at your tires to:You must put out emergency warning devices within ____ of stopping on the side of the road.Texting while driving a CMV is:If a driver begins to feel fatigued while driving, they should:How could you reduce your stress while driving?If an aggressive driver confronts you, you should not:When driving a vehicle equipped with an Anti-Lock Braking System (ABS), you should:If an approaching driver is using their high beam headlights, you should:Over-the-counter medication:If you are driving at a reduced speed in a construction zone when you spot a construction worker near the road, you should:If you realize you may be running late to your destination, you should:Joggers who are wearing headsets:A person working on a disabled vehicle on the shoulder of a road:What is the purpose of a vehicle inspection report?An open automobile window in cold weather may indicate that the driver is:While driving, you should:If an aggressive driver is involved in a crash on the road ahead of you, you should:The radiator cap:
Air Brakes
1. Oil and water usually collect in compressed air tanks. If you do not have an automatic tank drain, when should you drain the air tanks?2. Why should you drain water from the compressed air tanks?3. The air brake system for a straight truck or bus should not leak at a rate of more than______ psi per minute with the engine off and the brakes released.4. To make an emergency stop with air brakes, using the stab braking method, you should:5. You should know that your brakes are fading when:6. If the air compressor should develop a leak, what keeps the air in the tanks?7. To check the brake slack on S-cam brakes, you should park on:8. The application pressure gauge shows how much pressure you have:9. The spring brakes used on the chambers in a straight truck will bring you to a stop when air pressure drops below:10. The safety valve is set to automatically reduce pressure at:11. Your truck has a dual air system, and one of the systems loses its pressure. What will happen?12. If your truck or bus has dual parking control valves, you can use pressure from a separate tank to:13. If your truck has a properly functioning dual air brake system and minimum size air tanks, the air pressure should build from 85 to 100 psi within _ seconds?14. During normal driving, spring brakes are usually held back by:15. The air compressor stops pumping air at what psi?16. The driver must be able to see a warning before pressure in the service air tanks falls below _ psi.17. Excessive use of the service brakes results in overheating, which can lead to:18. The most common type of foundation brake found on heavy vehicles is the:19. If you must make an emergency stop, brake so you:20. The braking power of the spring brakes:21. The air brake lag distance at 55 mph on dry pavement adds about feet.22. Total stopping distance for air brakes is longer than that for hydraulic brakes due to distance.23. It is accepted that too much heat caused by using your brakes too often can also cause:24. Repeatedly pressing and releasing (fanning) the brake pedal may result in:25. The brake system that applies and releases the brakes when the driver uses the brake pedal is the______ brake system.26. A slack adjuster's free play needs to be adjusted if it is more than about _______ how many inches when you pull hard on it?27. An air brake system is fully charged at what psi?28. The brake pedal in an air brake system:29. The S-cam:30. Under normal conditions in order to engage the parking brakes the driver must first:31. Which of these is NOT a proper time to apply the parking brakes?32. If the spring brakes are on, when should you push the brake pedal?33. What is the first thing you should do when a low air pressure warning comes on:34. The parking or emergency brake on a heavy vehicle can only be held in position by something that cannot leak away, like:35. Air braking takes more time than hydraulic braking because air:36. When you apply the brakes, the brake shoes/linings are pressed against the:37. If air pressure is NOT build up fast enough within the correct amount of time:38. The proper method of braking when going down a long and/or steep grades after selecting the proper gear, is to brake until your speed is about _ miles per hour below your 'safe' speed, then release your brakes.39. In ideal conditions a truck or bus with an air brake going at 55 mph would require stopping distance of how many feet?40. It is not safe to drive a vehicle that has brake drums with cracks that are longer than of the width of the friction area.41. Why must air tanks be drained?42. It is possible to have an air leak in one system which will not affect the other.43. Both systems run off of the same air compressor, so if one air compressor malfunctions you will not be able to build or maintain pressure in either system.44. All vehicles with air brakes must have a low-pressure warning signal.45. What are spring brakes?46. Front wheel brakes are good under all conditions.47. When you apply your brakes, the air brake system works with an electric switch, by air pressure, to turn on the brake lights.48. What do air brakes use to make the brakes work?49. The service brake applies and releases:50. The parking brake applies and releases:51. The emergency brake system:52. The governor controls when the air compressor will pump into the air storage tanks.53. When the air pressure falls to the minimum pressure allowed in the system, the governor prevents more air from escaping the air tanks.54. The storage tanks are used to hold compressed air.55. When you put the brakes on by pushing down on the brake pedal:56. The S-cam forces the brake shoes away from one another and presses them against the inside of the brake drum. It is called the S-cam because:57. What is a dual air brake system?58. What are the slack adjusters?59. How can you check the slack adjuster?60. How can you test the low pressure warning signal?61. What are the maximum leakage rates?62. When is it OK to leave your truck unattended without applying parking brakes or chocking the wheels?63. If you are away from your vehicle for only a short time you don't need to use the parking brake.64. If you do not have automatic tank drains, how often should you drain the oil and water from the bottom of compressed air storage tanks?65. The use of brakes on a long steep downgrade is only a supplement to the braking effect of the engine.66. What factors can cause brakes to fade or fail?67. Why should you be in the proper gear before starting down a hill?68. If oil and water collects in the air tanks what can happen to the brakes?69. What is the purpose of an alcohol evaporator?70. What is another name for controlled braking?71. The brake chamber fills with air pushing the rod out which moves the_______ _______, which twists the_____ _______.72. If your vehicle has an alcohol evaporator you should check and fill the alcohol level everyday during cold weather.73. To test the air service brakes you should:74. The driver must be able to see a low pressure warning which comes on before pressure in the service air tank falls below:75. Converter dollies built on or after March 1, 1998 are required to have anti-lock brakes. These dollies will have:76. Which of these is the most important thing to remember about emergency braking?77. Controlled braking:78. To correct a drive-wheel braking skid, you should:79. How do you test the hydraulic brakes for leaks?80. Modern air brake systems are three different systems combined together. They are the service, parking, and the brakes.81. The air supply pressure gauge shows how much pressure:82. The parking or emergency brakes of trucks or buses can legally be held on by _ pressure.83. Air brake equipped vehicles have:84. The stop light switch:85. The air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:86. With air brake vehicles, the parking brakes should be used:87. The use of air brakes on a downgrade is only a supplement to the:88. Excessive heat in the brakes can cause the:89. You are on a steep down grade and have reached your safe speed of 40 mph. You would apply the service brakes until your speed drops to - mph.90. If your bus or truck has dual parking control valves, you can use pressure from a separate tank to:91. The modulating control valve allows you to control the:92. Some air brake systems have an alcohol evaporator. What may happen if you don't keep the unit filled with alcohol?93. Before driving a truck or bus with a dual air brake system, the pressure in each air brake system should be at least psi.94. How should you check that the spring brakes come on when the air pressure in the system drops below a certain level?95. For air brake systems in good condition, the air compressor should start pumping at about - psi.96. In air brake vehicles, the parking brake should be used:97. The air compressor governor controls:98. The most important thing to do when a low air pressure warning comes on is:99. If your vehicle has an alcohol evaporator, everyday during cold weather you should:100. Your bus or truck has a dual air brake system. If a low air pressure warning comes on for only one system, what should you do?101. It is not safe to drive a vehicle that has brake drums (or discs) with cracks or that are thinner than the manufacturer's specifications, generally this will be — an inch.102. Emergency controlled braking is when you:103. When performing your air brake leak down test your engine should be turned off.104. How should you check that your service brakes are working properly?105. How should you check that the service brakes come on when air pressure in the system drops below a certain level?106. If your truck's air compressor has its own oil supply when should you first check the oil level?107. What is emergency control braking?108. If your vehicle has an alcohol evaporator, it is there to:109. What is emergency stab braking?110. To check the brake slack on S-cam brakes, you should park on:Why should you regularly drain the air tanks?Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps.A dual air brake system:A safety valve is set to open at ____ psi.Air pressure should build up in a single air system within:The ____ tells a driver how much pressure is in the air tanks.When inspecting your brakes, a slack adjuster should move ____ from where it is attached to the push rod.Before driving a vehicle with air brakes, you should ensure that the spring brakes come on automatically when:During an applied leakage test, the maximum leakage rate for a double combination vehicle is:During an applied leakage test, the maximum leakage rate for a triple combination vehicle is:A visual low pressure warning signal should activate before air pressure drops to a level between:Some air brake systems use alcohol:Spring brakes come on:On trucks and buses, where are ABS malfunction lamps located?Before driving a vehicle with a dual air brake system, you must wait for the air compressor to build a minimum of ____ in both the primary and secondary systems.Anti-Lock Braking Systems (ABS):If using air tanks with manually operated drains, how often should you drain the tanks?The parking brake should be:If the brake pads rub against the brake drums and create too much heat:A low air pressure warning signal:Foundation brakes are used:The air compressor governor controls:When traveling down a steep downgrade:To confirm that a trailer has ABS, you can:Dollies equipped with ABS are required to have malfunction lamps located where?Front wheel braking works:When you press the brake pedal in a vehicle with S-cam brakes, air pressure pushes out the rod and moves the:Friction inside a brake drum is caused when the brake shoes and linings:Braking mechanisms are located ____ a brake drum.When a brake pedal is pressed and the S-cam is turned, the S-cam:To inspect slack adjusters on S-cam brakes, you need to:How should you test the low pressure warning signal?Before starting down a hill, be sure to:During an applied leakage test, the maximum leakage rate for a single vehicle with air brakes is:During a static leakage test, the maximum leakage rate for a double combination vehicle is:During a static leakage test, the maximum leakage rate for a triple combination vehicle with air brakes is ____ in a minute.During a static leakage test, the maximum leakage rate for a single vehicle with air brakes is ____ in one minute.While driving, spring brakes are generally held in place by:The emergency brake system uses:A modulating control valve can control the:During a walk-around inspection, ensure there are no cracks on the brake drums that are more than ____ of the width of the friction area.The air pressure in a dual air brake system should build from 85 to 100 psi within:In cold weather, an alcohol evaporator should be checked and filled:Applying the brake pedal causes air pressure to activate an electric switch and:A one-way check valve:An air compressor governor will stop the compressor from pumping air once the air tanks have an air pressure level of:While driving downhill, you should brake until you reach a speed that is ____ below your safe speed, then release the brake pedal.When you need to stop in an emergency, you should:If braking at a speed of 55 mph while driving on dry pavement, the brake lag can add ____ to your vehicle's total stopping distance.An air brake-equipped vehicle traveling at a speed of 55 mph under ideal driving conditions will need approximately ____ to come to a complete stop.
Advertisement
Combination Vehicles
The 'crack-the-whip' effect can:Trailers with low underneath clearance may be difficult to drive:A shut-off valve:If a trailer is too high:After coupling, there should be ____ between the upper and lower fifth wheel.When uncoupling a trailer, landing gear should be:Before a drive, ensure that air flows to all trailers by:Test the tractor protection valve by:Pull out the trailer air supply control to test:To help prevent rollovers, you should:Large combination vehicles take the longest amount of time to stop:What is off-tracking?When backing a trailer, how should you turn the steering wheel?What does the trailer air supply control look like?Air pressure in the ____ air line is controlled by either the foot brake or trailer hand brake.One function of the emergency air line is to:Having ABS on only one axle:If a trailer begins to skid, the driver should:The trailer hand valve should:All trailers made after ____ must be equipped with Anti-Lock Braking Systems (ABS).When a combination vehicle goes around a corner:If a parked trailer does not have spring brakes, you should keep the trailer from moving by:To prevent a rollover, a driver should:One way to prevent a rollover is to:In a sudden turn, the ____ trailer is the most likely to turn over.Using the trailer hand brake while experiencing a trailer jackknife will:If you need to back your trailer but cannot back up in a straight path, you should:Using the trailer hand valve while driving:Push in the trailer air supply control to:In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when:An air supply control in its 'emergency' position will:The service air line is attached to the:The emergency air line:Trailers built before 1975 are:While inspecting a coupling, you should go under the trailer and:If you are operating a vehicle built before 1998 and are unsure if the trailer has an Anti-Lock Braking System (ABS), you can:After finishing a pre-trip inspection, you should:After finishing a pre-trip inspection, you should:During a trip, which shut-off valves should be open?To test the trailer service brakes, you should:____ are the cause of more than half of all accident-related truck driver deaths.When traveling more slowly than 40 mph, maintain at least ____ of following distance per every 10 feet of your vehicle.Avoid needing to make sudden lane changes by:A lightly-loaded combination vehicle will stop more slowly than a fully-loaded vehicle because:When driving a bobtail tractor, you should be aware that:Compared to other commercial motor vehicles, combination vehicles need more space on the road because they are longer and they:When entering or crossing traffic while driving a combination vehicle, it is especially important that you:An air supply control lever should be in its 'normal' position when you are:When glad hands are coupled, the seals should be pressed together at an angle of:In a double or triple combination:1. You are coupling a semi trailer to your tractor but have not yet backed under. The trailer is at the right height when:2. You should not back a tractor under a trailer until the whole air system is:3. Which part of the kingpin should the locking jaws close around?4. When you get ready to back under the semi trailer you should line up:5. How should you test the tractor semi trailer connection for security?6. When should you use the hand valve to park a combination vehicle?7. You supply air to the trailer tanks by:8. Why should you be sure that the fifth wheel plate is greased as required?9. After you supply air to the trailer, make sure the air lines are not crossed and The trailer brakes are working. This is done by:10. There are two things that a driver can do to prevent a roll over. They are: (1) Keep the cargo as close to the ground as possible; and (2):11. Before you back under a trailer, make sure the:12. If the service air line comes apart while you are driving a combination vehicle but the emergency line stays together, what will happen right away?13. The air leakage rate for a combination vehicle (engine off, brakes on) should not be more than _ psi per minute.14. In normal driving, some drivers use the hand valve before applying the brake pedal to prevent a jackknife. Which of these statements is true?15. Why should you lock the tractor glad hands (or dummy couplers) to each other when you are not towing a trailer?16. For coupling to be completed, the safety catch for the fifth wheel locking lever must be:17. The front trailer supports are up and the trailer is resting on the tractor. Make sure:18. You have a major leak in the service line and you put on the brakes. Service air pressure will escape and cause the:19. When backing under a tractor under a trailer you should expect:20. The driver crosses the air lines when hooking up to an old trailer. What will happen?21. You are coupling a tractor to a semi trailer and have backed up but are not under it. What should you hook up before backing under the semitrailer?22. Air Lines on a combination vehicle are often colored to keep them from getting mixed up. The emergency line is _; the service line is _23. Which of these statements is true?24. After connecting the air lines, but before backing under the trailer you should:25. The hand valve should be used:26. The air leakage rate for a combination vehicle (engine off, brakes off) should be no more than
psi per minute.
a. 2
b. 3
C, 427. The fifth wheel locking lever is not locked after the jaws close around the kingpin. This means that:28. You are driving a combination vehicle when the trailer breaks away, pulling apart both air lines. You would expect the trailer brakes to come on and:29. Semi trailers made before 1975 that are equipped with air brakes:30. Almost half of all truck driver deaths are the result of:31. What statement best explains 'crack the whip effect'?32. Which type of truck-trailer combination has the best chance of the 'crack the whip' rollover?33. Which trailers are most likely to get stuck on railroad tracks?34. Where should the tractor be when you inspect landing gear after uncoupling the trailer?35. Under good driving conditions, you should leave at least one second of space between your vehicle and the vehicle ahead for every
a. 10
b. 20 feet of your vehicle's length. c. 3036. The safest way to make a turn without entering another traffic lane is:37. In general, the higher your truck's center of gravity, the:38. If the service line comes apart while you are driving a combination vehicle but the emergency line stays together, what will happen right away?39. Glad hands are used to connect the:40. A driver crosses the air lines when hooking up to an old trailer. What will happen?41. The hand valve should be used:42. When driving a set of doubles it is necessary to close which shut-off valve in the last trailer.43. Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:44. How much space should be between upper and lower fifth wheel after coupling?45. If the brakes are not released when you pushed the trailer air supply valve you should:46. You have pushed the trailer air supply valve. You should not back a tractor under a trailer until the whole air system is:47. You are coupling a tractor to a semi-trailer. You have connected the airlines. Before backing under the trailer you should:48. After you have coupled the trailer you should have to raise the landing gear by using:49. When connecting the glad hands, press the two seals with the coupler together at what degree to each other?50. The iron trailer supports are up and the trailer is resting on the tractor. Make sure:51. When you are uncoupling a loaded trailer, lower the landing gear until it:52. When coupling, the proper position of the fifth wheel is:53. Air and electrical lines from the tractor to the trailer should be:54. When backing a tractor under a trailer you should:55. Compared to a straight truck or bus there are _________ things to inspect in combination vehicles.56. You have coupled with a semitrailer. Where should you put the trailer supports before driving away?57. While checking if the trailer is securely coupled to the tractor, the landing gears should:58. After you lock the kingpin into the fifth wheel, you should check the connection by pulling:59. After the trailer has been coupled to the tractor, the tractor protection control valve should be placed in what position?60. The tractor protection valve will close and the trailer emergency brakes will come on when there is a major leak in the________ brake line.61. To unlock the fifth wheel, pull the release handle to the ________________ position.62. Off-tracking or cheating causes which of these to follow the wider path while making a turn?63. To stop a trailer skid you should:64. When should you use the hand valve to park a combination vehicle?65. When checking the trailer emergency brakes, on the tractor protection control valve should be placed in the __________ position?66. What gear should the tractor engine be in after you uncouple from the trailer and are inspecting the trailer supports?67. You are uncoupling a trailer. After you shut off the trailer air supply and lock the trailer brakes, you should:68. Combination vehicles are usually heavier, longer, and require more driving skill than single commercial vehicles.69. More than half of truck driver deaths in crashes are the result of rollovers. Trucks turn over easier when fully loaded and are:70. When you turn suddenly while pulling doubles, which trailer is most likely to turn over?71. Why should you not use the trailer hand brake to straighten out a jackknifing trailer?72. What is a tractor jackknife?73. You should swing wide to the left before starting a 90-degree turn to the right?74. Why should you not use the trailer hand valve while driving?75. Describe what the trailer air supply control does:76. Describe what the service line is for?77. What are the other names for the Service Air Line?78. What is the emergency air line?79. What is the emergency air line for?80. Why should you use chocks when parking a trailer without spring brakes?81. When a vehicle is carrying a load at night, which extends four feet or more beyond the rear of the body, there must be __ at the extreme end of the load.82. How long does it take a typical tractor-trailer to clear a single track? A double track?83. You have pushed in the trailer supply valve. You should not move the tractor until the whole air system:84. The best way to tell if your trailer has started to skid is to:85. Which of these vehicles off-track the most?86. A tractor with a(n) _ trailer requires the shortest amount of stopping distance.87. A trailer is most likely to jackknife when it is:88. If you have coupled with a semitrailer, where should the front trailer supports be before driving away?89. The fifth-wheel locking lever is not locked after the jaws close around the kingpin. This means that:90. You want to inspect the trailer supports. You should place the tractor transmission in which gear after you have uncoupled the trailer?91. When should you use chocks to park a trailer not equipped with spring brakes?92. Which shut off valves should be open and which closed?93. The trailer air supply control (also known as the tractor protection valve control) should automatically close when the air pressure falls to between:94. Combination vehicles and the rearward amplification each trailer has after a quick lane change is referred to as what?95. What is offtracking?96. A driver crosses the airlines when hooking up an old trailer with no spring brakes.97. What two things are most important to prevent a rollover?98. Charge the trailer air brake system and check that the trailer rolls freely. Then stop and pull out the trailer air supply control valve. Pull gently on the trailer with the tractor to check that the trailer emergency brakes are on.99. Charge the trailer air brake system and push the air supply knob in. Shut the engine off. Step on and off the brake pedal several times to reduce the air pressure in the tanks. The trailer air supply control should pop out when the air pressure falls100. What might happen if the trailer is too high when you should line up?101. There are two things that a driver can do to prevent a rollover. They are (1) go slowly around turns; (2) keep:
Hazardous Materials
What is the minimum passing score for the HazMat endorsement knowledge test?Before transporting hazardous materials, drivers must complete which mandatory training?What background check is required for HazMat endorsement?Which hazard class represents flammable liquids?What does a red placard with a flame symbol indicate?When is placarding required for hazardous materials?What information must be included on a shipping paper for hazardous materials?Which hazard class represents compressed gases?What should you do if you discover a hazardous material leak during transport?Where should shipping papers be kept while driving?What does the UN identification number provide?Which hazard class represents explosives?What is required when parking a vehicle carrying hazardous materials?What does a white placard with black stripes indicate?When must you attend your vehicle while carrying hazardous materials?What does a yellow placard indicate?Which document provides detailed emergency response information?What does a blue placard indicate?How often must HazMat endorsements be renewed?What does a green placard indicate?Which hazard class represents corrosive materials?What should you do before loading hazardous materials?What does a skull and crossbones symbol on a placard indicate?Which hazard class represents radioactive materials?What is the maximum driving time allowed for drivers carrying certain high-hazard materials?When transporting hazardous materials, smoking is:What does the packing group indicate?Which equipment is required when transporting hazardous materials?What should you do if your HazMat load shifts during transport?When can you leave your vehicle unattended while carrying hazardous materials?
Advertisement
Passenger Transport
What is the minimum passing score for the passenger endorsement knowledge test?When is a passenger endorsement required?Before driving, you should check that:When loading passengers, you should:What should you do if a passenger is disruptive?Standee lines on a bus indicate:When should you evacuate passengers?What is the proper way to use mirrors while driving a passenger vehicle?When approaching a railroad crossing with passengers:What should you do if your bus stalls on railroad tracks?When is it acceptable to talk with passengers while driving?What should you check about the passenger entry door before driving?When should you use your hazard lights while carrying passengers?What is the most important thing to remember about passenger safety?When backing a passenger vehicle:What should you do if you smell fuel while passengers are aboard?How should you handle passenger carry-on items?When should you count passengers?What should you do if a passenger appears to be ill?When driving in severe weather with passengers:
School Bus
What is the minimum passing score for the school bus endorsement knowledge test?What endorsements are required to drive a school bus?How far does the danger zone extend around a school bus?When should you activate the amber warning lights?When should you activate the red flashing lights and stop arm?What should you do if a student drops something near the bus?How many mirrors should a school bus have?What is the purpose of crossover mirrors?When loading students, you should:What should you do if you cannot account for all students after unloading?How should students cross the street after getting off the bus?What should you do if a student misbehaves on the bus?When should you evacuate the school bus?What is the correct evacuation order?How often should you check your mirrors while driving?What should you do at a railroad crossing?What should you do if your bus stalls on railroad tracks?When backing a school bus:What is the maximum seating capacity for students on a school bus?What should you do if you see a student running toward the bus from behind?
Advertisement
Tank Vehicles
What is the minimum passing score for the tank vehicles endorsement knowledge test?When is a tank vehicle endorsement required?What is liquid surge?When is liquid surge most dangerous?What should you do to minimize the effects of liquid surge?What are baffles in a tank?What is the main safety concern with tank vehicles' high center of gravity?How should you take curves when driving a tank vehicle?What should you inspect for leaks on a tank vehicle?What should you do if you discover a leak while driving?What is outage in tank loading?Why is outage important?What type of tank has the most liquid movement?How should you brake when driving a tank vehicle?What should you check before loading a tank?What is the danger of driving a tank vehicle with liquid sloshing?How should you handle lane changes in a tank vehicle?What should you do when parking a tank vehicle on a grade?What is the recommended following distance for tank vehicles?What should you do if you feel the vehicle becoming unstable due to liquid surge?
Doubles/Triples
What is the minimum passing score for the doubles and triples endorsement knowledge test?What is a converter dolly?When coupling a converter dolly to a trailer, you should:What should you check when inspecting the converter dolly?How should you connect air lines to a converter dolly?When should you test the trailer brakes on a double or triple?What is the main danger when driving doubles or triples?How much more stopping distance do doubles require compared to single trailers?When turning with doubles or triples, you should:What should you do when backing doubles or triples?What causes the 'crack-the-whip' effect?How should you approach curves with doubles or triples?What is the proper following distance for doubles and triples?When uncoupling a converter dolly, you should:What should you do if you feel the trailers pushing the tractor?What is the maximum length for a double trailer combination?When should you inspect the pintle hook?What should you check on the safety chains?How should you handle lane changes with doubles or triples?What is the most important factor in preventing rollovers with doubles and triples?
Advertisement