CDL Combination Vehicles Practice Test Results

Question 1
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
Question 2
54% answer correctly
The service line disconnects while you`re driving. What will happen?
The emergency tractor brakes will activate
The emergency trailer brakes will activate
The low air pressure warning light will come on
Nothing
Question 3
75% answer correctly
You`re hooking a tractor to a trailer. After connecting the air lines and before backing under the trailer you should:
Pull forward to test the strength of the air line connection
Activate air supply to the trailerarray(s) then lock the trailer brakes
Activate air supply to the trailerarray(s) and leave the trailer brakes unlocked
Be sure not to activate air supply to the trailerarray(s) to prevent damage to the air delivery system