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?
Detailed Explanation
The correct answer is "Use the parking brake to hold the vehicle until the clutch engages.". This question tests space management, mirror use, and avoiding low-speed backing collisions. For a differently worded version of this question, identify the hazard first and then choose the answer that preserves control, visibility, or legal compliance.
Correct Answer: Use the parking brake to hold the vehicle until the clutch engages.
Why This Matters on the CDL Test
This question tests whether you can distinguish systems that add gear ratios from a transmission that shifts automatically. Review multi-speed rear axles, auxiliary transmissions, automatic-transmission ranges, and safe shifting because those concepts appear together in the CDL manual.
How to Remember It
Say the rule in your own words, then explain why the wrong answers are unsafe or incomplete. That habit makes similar General Knowledge questions easier when the exam changes the wording.
Answer Review
Choose "Use the parking brake to hold the vehicle until the clutch engages." because this answer matches the safe CDL action for transmission types and gear selection. On the knowledge test, the safest answer is usually the one that protects space, control, visibility, legal compliance, or inspection accuracy before the vehicle is put at risk.
Why the other answers are weaker
- Keep the clutch slipping while slowly accelerating."Keep the clutch slipping while slowly accelerating." does not best answer this transmission types and gear selection question. When you see a similar option on the CDL permit test, compare it against the exact safety rule and choose the answer that prevents the most immediate risk.
- Let the vehicle roll straight backwards a few feet before you engage the clutch."Let the vehicle roll straight backwards a few feet before you engage the clutch." does not best answer this transmission types and gear selection question. When you see a similar option on the CDL permit test, compare it against the exact safety rule and choose the answer that prevents the most immediate risk.
Test-Day Checklist
- Read the question once for the topic, then read it again for the exact CDL action being tested in General Knowledge.
- Eliminate answers that sound convenient but skip an inspection, warning sign, or safety step.
- Say the correct rule out loud before moving on so you can recognize it when the exam changes the wording.
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Start Practice TestRelated Questions
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?
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?
If driving a vehicle with a manual transmission, you can prevent your vehicle from rolling backward when starting from a stop by:
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?
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?
Keep Studying General Knowledge
Question pages help you review one rule at a time. To build test-day speed, move back into the full General Knowledge practice test and answer a mixed set without looking at the explanation first.
State CDL Practice Paths
After you understand this answer, use a state practice path to connect the federal CDL rule with the DMV test pages drivers search for most.