CDL Combination Vehicles Practice Test Results

Question 1
49% answer correctly
Rearward amplification array(the "crack-the-whip" effect) is greater in combinations where there are __________ and __________ trailers.
Fewer, shorter
More, longer
More, shorter
Fewer, longer
Question 2
87% answer correctly
After hooking the trailer to the tractor you should check the fifth wheel connection by:
Pulling the tractor ahead quickly with the trailer brakes unlocked
Pulling the tractor ahead slowly with the trailer brakes locked
Backing the tractor slowly with the trailer brakes locked
Backing the tractor quickly with the trailer brakes unlocked
Question 3
75% answer correctly
After connecting to a trailer, how can you ensure that the connection is secure?
Lock the trailer brakes and pull forward slowly then inspect the connection
Pull forward quickly to stress the connection
Release the trailer brakes and pull forward slowly then inspect the connection
Lock the trailer brakes and pull backward slowly then inspect the connection