CDL Combination Vehicles Practice Test Results

Question 1
90% answer correctly
How would a driver supply air to trailer air tanks?
Activate the service line
Activate the air generator
Pull out the trailer air supply valve
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
White
Black
Question 3
75% answer correctly
After connecting to a trailer, how can you ensure that the connection is secure?
Lock the trailer brakes and pull forward slowly then inspect the connection
Pull forward quickly to stress the connection
Lock the trailer brakes and pull backward slowly then inspect the connection
Release the trailer brakes and pull forward slowly then inspect the connection