CA CDL Exam-Combination Vehicles Test Questions and
Answers
If you cannot make a turn without entering another traffic lane, you should: Correct
Answer-Turn wide as you complete the turn
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
Loss of air pressure in the emergency line causes: Correct Answer-The trailer's emergency
brakes to come on
To stop a trailer skid, you should: Correct Answer-Release the service brakes
The air leakage rate for a combination of two vehicles (engine off, brakes off) should not be
greater than: Correct Answer-3 psi or less in one minute
You are uncoupling a trailer. After you shut off the trailer air supply and lock the trailer brakes,
you should: Correct Answer-Back up gently to ease pressure on the fifth wheel locking
jaws
, CA CDL Exam-Combination Vehicles Test Questions and
Answers
Before you back under a truck trailer, make sure the: Correct Answer-Trailer brakes are
locked
The tractor protection value will close and the trailer emergency brakes will come on when
there is a major leak in which brake line? Correct Answer-Emergency brake line
To prevent a jackknife in normal driving, some drivers use the hand valve before stopping on
the brake pedal. Which of these statements is true? Correct Answer-It should not be done
When you get ready to back under a trailer, you should line up: Correct Answer-Directly in
front of the trailer
You have a major leak in the service line and you put on the brakes. Service air pressure will
escape and cause the: Correct Answer-Trailer emergency brakes to come on
Answers
If you cannot make a turn without entering another traffic lane, you should: Correct
Answer-Turn wide as you complete the turn
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
Loss of air pressure in the emergency line causes: Correct Answer-The trailer's emergency
brakes to come on
To stop a trailer skid, you should: Correct Answer-Release the service brakes
The air leakage rate for a combination of two vehicles (engine off, brakes off) should not be
greater than: Correct Answer-3 psi or less in one minute
You are uncoupling a trailer. After you shut off the trailer air supply and lock the trailer brakes,
you should: Correct Answer-Back up gently to ease pressure on the fifth wheel locking
jaws
, CA CDL Exam-Combination Vehicles Test Questions and
Answers
Before you back under a truck trailer, make sure the: Correct Answer-Trailer brakes are
locked
The tractor protection value will close and the trailer emergency brakes will come on when
there is a major leak in which brake line? Correct Answer-Emergency brake line
To prevent a jackknife in normal driving, some drivers use the hand valve before stopping on
the brake pedal. Which of these statements is true? Correct Answer-It should not be done
When you get ready to back under a trailer, you should line up: Correct Answer-Directly in
front of the trailer
You have a major leak in the service line and you put on the brakes. Service air pressure will
escape and cause the: Correct Answer-Trailer emergency brakes to come on
