CDL COMBINATION TEST COMPLETE COURSE STUDY
GUIDE WITH THOROUGHLY CHECKED ANSWERS
AND HIGH-QUALITY NOTES DEVELOPED FOR
GUARANTEED UNDERSTANDING AND EXAM
CONFIDENCE
If you cross connect the two air lines the following will result - CORRECT ANSWER-
You will not have air going to the trailer brakes
You have coupled with a semi-
trailer. In what position should you put the front trailer supports before driving away? -
CORRECT ANSWER-Fully raised with the crank handle secured in its bracket
Th trailer air supply control: - CORRECT ANSWER-Is a red, eight sided knob
A device which connects the service and emergency air lines from the truck to the trailer is
called.. - CORRECT ANSWER-Glad hands
If one of the glad hands on your blue air line is missing a seal: - CORRECT ANSWER-
You might end up with a service line air leak
In order to supply air to the trailer, you must first: - CORRECT ANSWER-
Stop engine so you can hear the brakes
The hand valve should be used: - CORRECT ANSWER-To test the trailer brakes
The air leakage rate for a combination vehicle (engine off, brakes on) should not be more t
han psi per minute - CORRECT ANSWER-4
, When should you use the hand valve to park a combination vehicle? - CORRECT ANSWER-
Never
GUIDE WITH THOROUGHLY CHECKED ANSWERS
AND HIGH-QUALITY NOTES DEVELOPED FOR
GUARANTEED UNDERSTANDING AND EXAM
CONFIDENCE
If you cross connect the two air lines the following will result - CORRECT ANSWER-
You will not have air going to the trailer brakes
You have coupled with a semi-
trailer. In what position should you put the front trailer supports before driving away? -
CORRECT ANSWER-Fully raised with the crank handle secured in its bracket
Th trailer air supply control: - CORRECT ANSWER-Is a red, eight sided knob
A device which connects the service and emergency air lines from the truck to the trailer is
called.. - CORRECT ANSWER-Glad hands
If one of the glad hands on your blue air line is missing a seal: - CORRECT ANSWER-
You might end up with a service line air leak
In order to supply air to the trailer, you must first: - CORRECT ANSWER-
Stop engine so you can hear the brakes
The hand valve should be used: - CORRECT ANSWER-To test the trailer brakes
The air leakage rate for a combination vehicle (engine off, brakes on) should not be more t
han psi per minute - CORRECT ANSWER-4
, When should you use the hand valve to park a combination vehicle? - CORRECT ANSWER-
Never
