How should you check that the spring Brakes come on when the air pressure in the system drops below a certain

a) Park on level ground, chock the wheels, release the parking brake when you have enough air pressure, shut the engine off and repeatedly press and release the brake pedal
b) Park on a slight incline, drain off air pressure, set the parking brakes, and check for movement
c) Park on level ground, wait for normal air pressure, release the parking brake, move the truck forward slowly, and apply the brakes firmly using the brake pedal


Ans: a) Park on level ground, chock the wheels, release the parking brake when you have enough air pressure, shut the engine off and repeatedly press and release the brake pedal

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