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Drivers who want to drive combination vehicles must pass the combination vehicles test. The New Jersey 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 Jersey CDL Manual. Take this practice test now to prepare for the actual NJ CDL combination test!
1. When driving a combination vehicle, which of the following 2 things will help you prevent a rollover?
Keeping cargo near the center of the vehicle and driving slowly on turns.
Keeping cargo near the center of the vehicle and driving slowly on the highway.
Keeping cargo near the ground and driving slowly on the highway.
Keeping the cargo near the ground and driving slowly around turns.
2. When inspecting the coupling, make sure ________ between the upper and the lower fifth-wheel.
there is at least 1 foot
there are 10 feet
there is no space
there are at least 36 inches
3. If you cannot make a right turn without entering another traffic lane, you should:
swing wide to the left before starting the turn.
turn wide before you start the turn.
watch out for vehicles coming toward you and back up for them.
turn wide as you complete the turn.
4. Inspecting the fifth-wheel does NOT include:
checking for missing or damaged parts.
ensuring the fifth wheel is in the proper position for coupling.
checking the area around the vehicle.
making sure that the fifth-wheel plate is greased as required.
5. If loose or missing, _______ may cause movement between the frame and fifth wheel assembly.
electric connectors
safety chains
mounting bolts
locking pins
6. If your truck has automatic transmission, you should downshift:
after entering a curve.
when going down grades.
when you need to accelerate.
whenever road conditions allow.
7. 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.
8. It's very important to distribute the cargo so it is:
as low as possible.
as high up as possible.
in the centre of the load.
piled up.
9. Which of the following is NOT TRUE? When you drive a tractor-trailer combination with ABS, you should:
monitor your tractor and trailer as you slow down, and if it is safe to do so, back off the brakes to stay in control.
drive slower to keep your vehicle in a straight line.
use only the braking force necessary to stop safely.
brake the same way, regardless of whether you have ABS on the tractor, the trailer, or both.
10. When backing a trailer, you should:
pull-up frequently to reposition the vehicle.
turn the steering wheel toward the direction you want to go.
avoid braking.
not back up in a straight line.
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NJ CDL Combination Test

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