ASE S4 Brakes Exam: Questions & Answers: A Plus

ASE S4 Brakes Exam: Questions & Answers:
A Plus
When checking the foot valve primary and secondary ports for leakage
what is the allowable pressure difference?
(Ans- It should not exceed a 5 pounds per square inch difference.
At what pressure should the stoplight switch illuminate on air brake
systems?
(Ans- 6 pounds per square inch or less.
When checking the stoplight switch what is the allowable leakage?
(Ans- There should be no leakage.
When checking the relay valve what is the allowable leakage at the
exhaust port of the valve?
(Ans- It should not exceed a 1 inch soap bubble every three seconds.
When checking the limiting quick release valve what is the allowable
leakage at the exhaust port of the valve?
(Ans- It should not exceed a 1 inch soap bubble every three seconds.