District Of Columbia CDL Class B Knowledge Test 2

Question 1

Which of the following statements is correct?

Rims with a missing lug nut are acceptable if there are at least four other lug nuts on the rim. A cracked lock ring is acceptable if the vehicle is being driven at speeds under 55 mph. A missing clamp is dangerous and should be corrected. Welded repairs are acceptable for wheels on rear axles.

Correct Answer:

A missing clamp is dangerous and should be corrected.

Question 2

Convex mirrors:

Cannot be used on vehicles transporting hazardous materials. Can replace flat mirrors. Can be helpful to see a wider area. Are illegal to be used in most states.

Correct Answer:

Can be helpful to see a wider area.

Question 3

In a vehicle with dual parking control valves, once air pressure is lost and the spring brakes come on:

You will be unable to move the vehicle. A separate air tank can be used to release the spring brakes for a short period of time. You can use the spring brakes to continue driving normally. The air tanks will automatically refill to a safe air pressure level.

Correct Answer:

A separate air tank can be used to release the spring brakes for a short period of time.

Question 4

Your vehicle's final position should be:

Exactly where the examiner has instructed it to be. Within five feet of the final position described by the examiner. Wherever you can safely park. Within two feet of the final position described by the examiner.

Correct Answer:

Exactly where the examiner has instructed it to be.

Question 5

Cargo inside a trailer:

Does not need to be secured. Should be stacked no taller than three feet high. Should be secured to prevent movement in transit. Should be loaded with the heaviest items on top of lighter items.

Correct Answer:

Should be secured to prevent movement in transit.

Question 1 of 49

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About this Exam

Prepare with the District Of Columbia CDL Class B Knowledge Test 2 practice quiz. This question bank includes 49 questions covering vehicle, brakes, driving, cargo, and control. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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District Of Columbia CDL Class B Knowledge Test 2

This practice set contains 49 questions from the matching question bank and focuses on vehicle, brakes, driving, cargo, and control. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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District Of Columbia CDL Class B Knowledge Test 2

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