CDL Doubles and Triples Practice Test Results

Question 1
52% answer correctly
When might you consider disconnecting the steering axle brakes to help keep a tractor straight?
Whenever necessary
When driving on a grade
When the road is slippery
Never
Question 2
83% answer correctly
You disconnect the dolly from the front trailer while it is still under the rear trailer. What will happen?
The trailers will decouple
It will collapse
The dolly tow bar will flip up
Nothing
Question 3
35% answer correctly
Which of the following statements about rearward amplification is not true?
The longer the trailers you`re pulling the larger the effect
The more trailers you`re pulling the larger the effect
The rearmost trailer is the most affected
Another name for rearward amplification is the crack-the-whip effect