CDL Combination Test (2024) - FREE New Hampshire Practice Test

1. When inspecting the coupling, check that the safety latch is:

pushing against the kingpin.
in position over the locking lever.
in the "lock" position.
None of the above.

2. The trailer hand valve should:

be used in driving.
never be used for parking.
never be used to test the trailer brakes.
All of the above.

3. To prevent rollover, drivers of combination vehicles should:

make sure the cargo is not centered and spread out.
keep the load is to one side.
keep the cargo as close to the ground as possible.
brake while turning.

4. To secure the tractor you should:

Connect the tractor service air-line to the trailer service glad hand.
Put on the parking brake and put the transmission in neutral.
Check that the kingpin and the fifth-wheel are aligned.
All of the above.

5. Blocking and bracing are:

used to keep cargo from sliding and to prevent movement of cargo.
driving techniques used to regain control when your drive wheels start to skid.
coupling devices used to connect the service air lines from the truck or tractor to the trailer.
None of the above.

6. Why should you cover your cargo?

Because spill protection is a safety requirement in many states.
To protect the cargo from weather.
To protect people from spilled cargo.
All of the above.

7. If your vehicle thumps or vibrates heavily, it may be a sign that:

8. How do you find out how many seconds of following distance you have?

Wait until the vehicle ahead of you passes a pavement marking, shadow or landmark. Then count off the seconds until you reach the same spot.
Wait until the vehicle ahead of you passes a pavement marking or some other clear landmark, then use the stopwatch on your mobile phone to see how long it takes you to reach the same spot.
Pass a stationary object and count how many seconds it takes the vehicle ahead of you to reach the same spot.
None of the above.

9. If your vehicle has dummy couplers, why should you use them when the air lines are not connected to a trailer?

To prevent freezing of the washer liquid.
To prevent overheating.
Because if you don't, you will never build system pressure.
To prevent water and dirt from getting into the coupler and the air lines.

10. If your trailer starts to skid, you should:

pump the brakes.
lock the brakes.
steer in the opposite direction.
release the brakes.

COMBINATION PRACTICE TEST - NH CDL