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Drivers who want to drive combination vehicles must pass the combination vehicles test. The New Hampshire CDL combination test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The test covers the combination vehicles section of the New Hampshire CDL Manual. Take this practice test now to prepare for the actual NH CDL combination test!
1. Most heavy trucks with manual transmissions require ____ to change gears.
single clutching
double clutching
triple clutching
None of the above.
2. If a drawbridge does not have a signal light or traffic control attendant, you should:
drive through the drawbridge with caution.
stop and look to make sure the draw is completely closed before crossing.
get through the drawbridge as quickly as possible.
stop at least 5 feet before the draw of the bridge.
3. Older trailers do not have spring brakes. If the air supply leaks away:
there will be no emergency brakes.
the trailer will stop normally.
the ABS won't work properly.
All of the above.
4. Longer combination vehicles have the tendency to swing wide on turns. This is called:
5. Tests have shown that trucks with a high center of gravity:
can roll over at the posted speed limit for a curve.
are less likely to roll over when entering a curve.
can roll over if the driver exceeds the posted speed limit for a curve.
can roll over if the driver slows down before entering a curve.
6. When the ______ closes, it stops any air from going out of the tractor.
height control valve
tractor protection valve
alcohol evaporator
hand valve
7. When the trailer breaks away or develops a bad leak, the tractor protection valve will close automatically and:
the tractor will lose all air pressure.
the engine will shut down.
the trailer supply valve will stay open.
the trailer emergency brakes will come on.
8. If your vehicle catches fire, you should pull over:
in an open area.
at a service station.
near other vehicles.
near trees.
9. Brake fade results from, and is affected by:
excessive heat caused by using the brakes too much.
excessive heat caused by not relying on the engine braking effect.
brakes out of adjustment.
All of the above.
10. When you back under a trailer:
use lowest reverse gear.
make sure the trailer brakes are locked.
back the tractor slowly.
All of the above.
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CDL Combination Test (NH)

Number of questions: 20
Correct answers to pass:16
Passing score:80%
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