CA CDL Combination Vehicles Test Exam
QUESTIONS AND ANSWERS 100%
RATED CORRECT WITH 100% SURE
PASS|GRADED A+
If you cannot make a turn without entering another traffic lane, you should: - CORRECT ANSWERS
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 ANSWERS At normal pressure
Loss of air pressure in the emergency line causes: - CORRECT ANSWERS The trailer's
emergency brakes to come on
To stop a trailer skid, you should: - CORRECT ANSWERS Release the service brakes
The air leakage rate for a combination of two vehicles (engine off, brakes off) should not be greater
than: - CORRECT ANSWERS 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 ANSWERS Back up gently to ease pressure on the fifth wheel locking jaws
Before you back under a truck trailer, make sure the: - CORRECT ANSWERS 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 ANSWERS Emergency brake line
QUESTIONS AND ANSWERS 100%
RATED CORRECT WITH 100% SURE
PASS|GRADED A+
If you cannot make a turn without entering another traffic lane, you should: - CORRECT ANSWERS
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 ANSWERS At normal pressure
Loss of air pressure in the emergency line causes: - CORRECT ANSWERS The trailer's
emergency brakes to come on
To stop a trailer skid, you should: - CORRECT ANSWERS Release the service brakes
The air leakage rate for a combination of two vehicles (engine off, brakes off) should not be greater
than: - CORRECT ANSWERS 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 ANSWERS Back up gently to ease pressure on the fifth wheel locking jaws
Before you back under a truck trailer, make sure the: - CORRECT ANSWERS 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 ANSWERS Emergency brake line