LA CDL AIR BRAKES PRACTICE TEST
16.
To check the slack adjusters on S-cam brakes, you should:
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park on level ground, chock the wheels and release the parking brakes, then use gloves and pull hard on each slack adjuster that you can reach.
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park on level ground and fan off the air pressure by rapidly applying and releasing the foot brake.
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release the parking brake valve and begin reducing the air pressure by stepping on and off the brake pedal.
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All of the above.
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17.
With air brake vehicles, you should use the parking brakes:
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as little as possible.
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only if your vehicle is equipped with ABS.
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only during the vehicle inspection test.
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whenever you leave the vehicle unattended.
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18.
If a load is 10 feet long, the minimum number of tie-downs required is:
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1
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3
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2
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4
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19.
The __________ keeps air from going out if the air compressor develops a leak.
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tractor protection valve
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air compressor drive belt
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emergency relay valve
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one-way check valve
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20.
To use the controlled braking method in an emergency, you should:
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apply the brakes when the wheels lock up.
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apply the brakes as hard as you can without locking the wheels.
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apply your brakes all the way, and release the brakes when the wheels lock up.
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pump the brake pedal 3 times.
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