Exam (elaborations)
CDL COMBINATION VEHICLE EXAM QUESTIONS AND ANSWERS 2024
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CDL COMBINATION VEHICLE EXAM QUESTIONS AND ANSWERS 2024
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CDL COMBINATION VEHICLE 2024EXAM
ANSWER ALL QUESTIONS IN THIS SECTION
QUESTION 1
The safest way to make a turn without entering another traffic lane is:
A. You should turn wide before you start the turn.
B. You should turn wide as you complete the turn.
C. You should not make a turn and move to another place where you can make a
turn without crossing other lanes. - ANSWERS-You should turn wide as you
complete the turn.
QUESTION 2
In general, the higher your truck's center of gravity, the:
A. Easier it is to turn around corners.
B. More stable it is when turning.
C. Easier it is to turn over. - ANSWERS-Easier it is to turn over.
END OF
PAGE 1
, CDL COMBINATION VEHICLE 2024
EXAM
QUESTION 3
If the service line comes apart while you are driving a combination vehicle, but
the emergency line stays together, what will happen right away?
A. The trailer's tank will exhaust through the open line.
B. The emergency trailer brakes will come on.
C. Nothing is likely to happen until you try to apply the brakes. - ANSWERS-
Nothing is likely to happen until you try to apply the brakes.
QUESTION 4
Glad hands are used to connect the:
A. When you make a quick lane change or sudden movement with your steering
wheel, the rear trailer tends to
swing out. The force of the rear trailer becomes amplified, causing it to roll over
(rearward amplification).
A. Electric lines from the tractor to trailer.
B. Kingpin from the trailer to the locking jaws of the fifth wheel.
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PAGE 2
, CDL COMBINATION VEHICLE 2024
EXAM
C. Service and emergency air lines from the truck to the trailer. - ANSWERS-
Service and emergency air lines from the truck to the trailer.
QUESTION 5
A driver crosses the air lines when hooking up to an old trailer. What will happen?
A. The hand valve will apply the tractor brakes instead of the trailer brakes.
B. If the trailer has no spring brakes, you could drive away but you wouldn't have
trailer brakes.
C. The brake lights will come on when the brake pedal is pressed. - ANSWERS-If
the trailer has no spring brakes, you could drive away but you wouldn't have
trailer brakes.
QUESTION 6
The hand valve should be used:
A. As a parking brake.
B. Only with a foot brake.
C. To test the trailer brakes. - ANSWERS-To test the trailer brakes.
END OF
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, CDL COMBINATION VEHICLE 2024
EXAM
QUESTION 7
When driving a set of doubles it is necessary to close which shut-off valve in the
last trailer?
A. Front.
B. Back.
C. Middle section. - ANSWERS-Back.
QUESTION 8
Your emergency air line breaks or gets pulled apart while you are driving. The loss
of pressure will cause the:
A. Air compressor to unload instead of pumping air.
B. Emergency trailer brakes to come on.
C. Trailer supply valve to open. - ANSWERS-Emergency trailer brakes to come on.
END OF
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