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CDL Practice Test
General Knowledge
Air Brakes
Combination Vehicles
Doubles and Triples
Tanker Vehicles
Hazardous Materials
Transporting Passengers
CDL Combination Vehicles Practice Test
Question 1 of 3
Suppose a trailer separates from the tractor and pulls apart the air lines. The trailer brakes would apply causing which of the following to occur?
A
The tractor brakes would lock up
B
The tractor would lose air pressure through the parted air lines
C
There would be no impact to the tractor brakes
D
The tractor brakes would apply
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