Home › CDL Practice Tests › Air Brakes Questions › Question 175
Which condition can make a stroke reading misleading if it is not corrected first?
- A.Having the wheels chocked during the measurement
- B.Marking the pushrod with chalk
- C.Low system air pressure during the test, a bent pushrod, or the parking (spring) brakes not being fully released
- D.Reading the measurement at the chamber face
Correct answer
C. Low system air pressure during the test, a bent pushrod, or the parking (spring) brakes not being fully released
Why
Stroke must be measured under the intended conditions, with normal pressure and the spring brakes released so the service chamber does the work. Bent parts or low pressure change the movement and can hide or imitate an adjustment fault.
Manual topic: Air Brakes - Slack Adjusters · From the Air Brakes practice bank (AB-175).