To check the free play of manual slack adjusters of S-cam brakes, you should park on:
Answer: C
Level ground, chock the wheels and release the parking brakes.
Prior to manually checking the slack adjusters of the service brakes, ensure the vehicle is parked on a flat surface, wheel chocks have been placed, and the parking brakes are released.
Source: Alabama CDL Manual
All choices
- ALevel ground and apply the parking brakes, then apply service brakes.
- BLevel ground and drain off air pressure before checking the adjustment.
- CLevel ground, chock the wheels and release the parking brakes.
Why the other answers are wrong
A. Level ground and apply the parking brakes, then apply service brakes.
Choice A is wrong because applying the parking and service brakes can affect slack adjuster free play and does not ensure the vehicle is safely secured for inspection.
B. Level ground and drain off air pressure before checking the adjustment.
Choice B is wrong because draining air pressure before checking adjustment is unsafe and does not provide accurate slack adjuster free play measurement.
Alabama CDL Air Brakes Test Info
Questions on Exam
25
Passing Score
80%
Time Limit
Typically 30 minutes; varies by testing location
Age Requirements
Intrastate: 18+ · Interstate: 21+
Alabama Law Enforcement Agency (ALEA)
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More CDL Air Brakes Practice Questions
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