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?
There would be no impact to the tractor brakes
The tractor brakes would apply
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.
Fewer, longer
Fewer, shorter
More, longer
More, shorter
Question 3
88% answer correctly
Large combination vehicles that are empty take __________ time to stop than those that are fully loaded.
The same amount of
More
Half
Less