CDL Doubles and Triples Practice Test Results

Question 1
39% answer correctly
You`re driving a 80 ft. double trailer at 45 mph. If the pavement is dry and weather is good how many seconds of following distance should you maintain?
45
9
10
8
Question 2
77% answer correctly
How should the shut off valves be set on a double trailer?
Rear of front trailer closed, rear of back trailer closed
Rear of front trailer open, rear of back trailer closed
Rear of front trailer open, rear of back trailer open
Rear of back trailer open, rear of front trailer closed
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