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, free
Open, latched
Open, free
Closed, latched
Question 2
41% answer correctly
How can you check to make sure that trailer height is correct before coupling?
Raise the landing gear completely
Use both side view mirrors
All of these are correct
Use a landmark like a nearby tree
Question 3
41% answer correctly
How do you test air supply to the rear trailer?
Pull forward slowly then apply the brakes and watch for a drop in air tank psi
Open the emergency line shut off on the rear trailer
Open the service line shut off on the rear trailer
Use a calibrated air pressure gauge