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CA CDL Combination Vehicles Test Exam Questions and Answers.docx
Question 1: There are two things that can prevent a rollover.
They are: (1) keep the cargo as close to the ground as possible;
and (2)
CORRECT ANSWER : Go slow around turns
Question 2: Compared to a straight truck or bus, there are _____
things to inspect on a combination vehicle
CORRECT ANSWER : More
Question 3: Before you back under a truck trailer, make sure the
CORRECT ANSWER : Trailer brakes are locked
Question 4: You have pushed in the trailer supply valve. You
should not move the tractor until the whole air system is
CORRECT ANSWER : At normal pressure
Question 5: The front trailer supports are up and the trailer is
resting on the tractor. Make sure
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CORRECT ANSWER : There is enough clearance between the
tractor frame and the landing gear.
Question 6: True or false? Bobtail tractors can take longer to
stop than a combination vehicle loaded to maximum gross weight
CORRECT ANSWER : TRUE
Question 7: When checking the trailer's emergency brakes, the
tractor protection control valve should be placed in the _____ position
CORRECT ANSWER : Emergency
Question 8: To stop a trailer skid you should
CORRECT ANSWER : Release the brakes
Question 9: A Tractor with a ____ trailer requires the shortest
stopping distance
CORRECT ANSWER : Fully loaded
Question 10: A trailer is most likely to jackknife when it is
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CORRECT ANSWER : Empty
Question 11: To unlock the fifth wheel, pull the release handle
to the ______ position
CORRECT ANSWER : Open
Question 12: You are coupling a tractor to a semitrailer. You
have backed up but are not under it. What should you hook up before backing under the semitrailer?
CORRECT ANSWER : The emergency and service air lines
Question 13: Glad hands are used to connect the
CORRECT ANSWER : Service and emergency air lines from
the truck to the trailer
Question 14: The best way to tell if your trailer has started to
skid is to
CORRECT ANSWER : See it in your mirrors
Question 15: How much space should be between the upper and
the lower fifth wheel after coupling?
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CORRECT ANSWER : None
Question 16: If you have coupled with a semitrailer, where
should the front trailer supports be before driving away?
CORRECT ANSWER : Fully raised with the crank handle
secured in its bracket
Question 17: When you get ready to back under a semitrailer,
you should line up
CORRECT ANSWER : Directly in front of the trailer
Question 18: Under good driving conditions you should leave at
least one second of space between your vehicle and the vehicle ahead for every _____ feet of your vehicle's length
CORRECT ANSWER: 10
Question 19: Which of these vehicles off-track the most?
CORRECT ANSWER : 5-axle tractor towing a 52-foot trailer
Question 20: After you have coupled the trailer, you should
begin raising the landing gear by using the ____ gear