CDL Doubles and Triples Practice Test Results

Question 1
84% answer correctly
Driving a truck with double or triple trailers requires:
More care when driving in bad weather and on grades
More skill than driving with a single trailer
More following distance than driving with a single trailer
All of these are correct
Question 2
35% answer correctly
Which of the following statements about rearward amplification is not true?
Another name for rearward amplification is the crack-the-whip effect
The more trailers you`re pulling the larger the effect
The rearmost trailer is the most affected
The longer the trailers you`re pulling the larger the 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 the first trailer and close the shut off valves of the second trailer
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 both trailers
Close the shut off valves of both trailers