CDL Combination Vehicles Practice Test Results

Question 1
63% answer correctly
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?
The tractor brakes would apply
There would be no impact to the tractor brakes
The tractor would lose air pressure through the parted air lines
The tractor brakes would lock up
Question 2
49% answer correctly
Rearward amplification array(the "crack-the-whip" effect) is greater in combinations where there are __________ and __________ trailers.
More, shorter
More, longer
Fewer, longer
Fewer, shorter
Question 3
54% answer correctly
The service line disconnects while you`re driving. What will happen?
The low air pressure warning light will come on
The emergency tractor brakes will activate
Nothing
The emergency trailer brakes will activate