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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. When backing a tractor under a trailer:
you should lift the trailer off the fifth-wheel.
the trailer will be lifted slightly when the tractor backs under it.
the end of the kingpin will be even with the top of the fifth wheel.
the fifth-wheel will come out from under the trailer.
2. Which of the following statements about off-tracking is true?
If there is more than one trailer, the rear wheels of the last trailer will off-track the most.
Longer vehicles off-track less.
When a vehicle goes around a corner, the rear wheels follow the same path as the front wheels.
None of the above.
3. Radial and bias-ply tires:
should not be used together.
should be used together only during bad weather.
should be used together only when driving in packed snow.
should be used together.
4. As part of your vehicle inspection, you are checking that air flows to all trailers. After using the trailer handbrake to provide air to the service line, you go to the rear of the rig. When you open the emergency line shut-off valve at the rear of the last trailer, you should hear:
the service line valve close.
a thumping sound.
air escaping from the open valve.
a mechanical vibration.
5. ABS:
replaces your normal brakes.
allows you to brake harder.
should only be used on dry roads.
is an addition to your normal brakes.
6. You should always try to back toward the driver's side because:
you can watch the rear of your vehicle out the side window.
you can more easily correct any steering errors.
backing toward the left side is more dangerous.
None of the above.
7. If you must drive slowly, how should you alert following drivers?
Flash your brake lights
Help them out by signaling when it is safe to pass
Use your emergency flashers if it is legal
Turn on your taillights
8. If your cargo only fills one-third of the length of your trailer, make sure your cargo is:
centered and spread out as much as possible.
to one side and as close to the ground as possible.
loaded so there is a high center of gravity.
piled up high with heavy cargo on top.
9. The only way to stop a front-wheel skid is to:
supply more power to the drive wheels.
let the vehicle slow down.
All of the above.
10. Which of the following will NOT help you prevent rollover?
Driving slowly around turns.
Using the controlled braking method.
Keeping the cargo as close to the ground as possible.
All of the above.
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NH CDL Combination Test

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