NJ CDL AIR BRAKES PRACTICE TEST
21.
The __________ keeps air from going out if the air compressor develops a leak.
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tractor protection valve
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emergency relay valve
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air compressor drive belt
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one-way check valve
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22.
When you release the brake pedal, the _____ rotates back and a spring pulls the brake shoes away from the drum.
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hydraulic brake system
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pressure gauge
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air compressor belt
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S-cam
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23.
To check the slack adjusters on S-cam brakes, you should:
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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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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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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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24.
Air pressure should build up in a single air system, within about:
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1 minute.
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3 minutes.
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15 minutes.
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10 minutes.
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25.
Axle weight is:
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the maximum safe weight your tires can carry at a specified pressure.
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the weight transmitted to the ground by one axle or one set of axles.
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the value specified by the manufacturer as the loaded weight of one axle.
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the weight of all the axles added together.
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