Home › CDL Practice Tests › Air Brakes Questions › Question 174
When measuring stroke, why should the measurement be made with a full service brake application rather than a light touch on the pedal?
- A.A full application gives the maximum working travel that must be compared with the chamber limit
- B.A light application shows the true limit more accurately
- C.Full application is only needed for the parking brake
- D.Pedal pressure does not change pushrod travel
Correct answer
A. A full application gives the maximum working travel that must be compared with the chamber limit
Why
Partial applications stop short of the travel the chamber would use in a hard stop, hiding an adjustment problem. The limit is about the travel available when maximum braking is demanded.
Manual topic: Air Brakes - Slack Adjusters · From the Air Brakes practice bank (AB-174).