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 rearmost trailer is the most affected
The longer the trailers you`re pulling the larger the effect
Another name for rearward amplification is the crack-the-whip effect
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
Close both shut off valves
Open both shut off valves
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