CDL Doubles and Triples Practice Test Results

Question 1
86% answer correctly
During your pre-trip inspection of your double rig you inspect the converter dolly. Its air tank drain valves should be __________ and the pintle hook should be __________.
Closed, latched
Open, latched
Open, free
Closed, free
Question 2
41% answer correctly
How can you check to make sure that trailer height is correct before coupling?
All of these are correct
Use a landmark like a nearby tree
Raise the landing gear completely
Use both side view mirrors
Question 3
41% answer correctly
How do you test air supply to the rear trailer?
Use a calibrated air pressure gauge
Pull forward slowly then apply the brakes and watch for a drop in air tank psi
Open the service line shut off on the rear trailer
Open the emergency line shut off on the rear trailer