CDL Combination Test (2024) - FREE Virginia CDL Practice Test

1. A trailer jackknife is more likely to happen when the trailer is:

2. Older trailers do not have spring brakes. If the air supply leaks away:

there will be no emergency brakes.
the ABS won't work properly.
the trailer will stop normally.

3. After the pre-trip inspection, drivers should inspect their cargo and its securing devices again within ________ after beginning the trip.

4. What is the minimum tread depth for tires other than front tires?

5. Antifreeze:

helps the engine only under hot conditions.
helps the engine under hot conditions as well as cold conditions.
helps the engine only when the temperature is below freezing.

6. Most hydraulic brake failures occur for one of two reasons, one of which is:

loss of hydraulic pressure.
excessive downshifting.
relying too much on the engine braking effect.

7. When checking the air and electric lines to the trailer, be sure that the air lines are properly connected to the gland hands, and are:

properly greased.
secured with enough slack for turns.
secured with enough air leaks for turns.

8. If you feel drowsy while driving, what should you do?

Pull off the road and get some sleep.
Turn on the radio to keep you awake.
Get an energy drink.

9. A high center of gravity means:

a rollover is less likely.
you'll have better traction.
you are more likely to tip over.

10. To avoid rollbacks when you start, you should:

if you have manual transmission, partly engage the clutch before you take your right foot off the brake.
release the parking brake only when you have applied enough engine power.
All of the above.

COMBINATION TEST VIRGINIA - PRACTICE TEST