CDL Doubles and Triples Practice Test Results

Question 1
35% answer correctly
Which of the following statements about rearward amplification is not true?
The rearmost trailer is the most affected
Another name for rearward amplification is the crack-the-whip effect
The more trailers you`re pulling the larger the effect
The longer the trailers you`re pulling the larger the effect
Question 2
65% answer correctly
When making a lane change, check your mirrors:
When starting the lane change
Before signaling the lane change
After completing the lane change
All of these are correct
Question 3
71% answer correctly
Before you can supply the air tanks of a second trailer with air you need to:
Close the shut off valve at the rear of the first trailer and open the shut off valve at the rear of the second trailer
Open the shut off valve at the rear of the first trailer and close the shut off valve at the rear of the second trailer
Open both shut off valves
Close both shut off valves