CDL Doubles and Triples Practice Test Results

Question 1
84% answer correctly
Driving a truck with double or triple trailers requires:
More following distance than driving with a single trailer
More skill than driving with a single trailer
All of these are correct
More care when driving in bad weather and on grades
Question 2
35% answer correctly
Which of the following statements about rearward amplification is not true?
The more trailers you`re pulling the larger the effect
The longer the 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
Question 3
74% answer correctly
What is required before you supply air to the air tanks of the second trailer?
Open the shut off valves of both trailers
Close the shut off valves of both trailers
Open the shut off valves of the second trailer and close the shut off valves of the first trailer
Open the shut off valves of the first trailer and close the shut off valves of the second trailer