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?

Combination Vehiclesmedium

AIf the trailer has no spring brakes, you can drive away, but you will not have trailer brakes.

BThe brake pedal will work the trailer spring brakes instead of the air brakes.

CThe hand valve will apply the tractor brakes instead of the trailer brakes.

Detailed Explanation

The correct answer is "If the trailer has no spring brakes, you can drive away, but you will not have trailer brakes.". This is based on federal CDL regulations and safety standards.

Correct Answer: If the trailer has no spring brakes, you can drive away, but you will not have trailer brakes.

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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?

Detailed Explanation

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Related Questions

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. 30

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?

While inspecting a coupling, you should go under the trailer and:

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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?

Detailed Explanation

Ready to practice for real?

Related Questions

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. 30

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?

While inspecting a coupling, you should go under the trailer and:

69. More than half of truck driver deaths in crashes are the result of rollovers. Trucks turn over easier when fully loaded and are:

91. When should you use chocks to park a trailer not equipped with spring brakes?

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. 30