CDL Combination Vehicles Practice Test Results

Question 1
90% answer correctly
How would a driver supply air to trailer air tanks?
Activate the air generator
Pull out the trailer air supply valve
Activate the service line
Push in the trailer air supply valve
Question 2
92% answer correctly
On a combination vehicle what color is the emergency air line?
Yellow
Red
Black
White
Question 3
88% answer correctly
Offtracking is __________?
When the front wheels slide during extreme braking
When the front wheels follow a different path than the rear wheels
When the rear wheels follow a different path than the front wheels
When the rear wheels slide during extreme braking