SD CDL AIR BRAKES PRACTICE TEST
16.
To check slack adjusters on S-cam brakes, you should:
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use gloves and pull hard on each slack adjuster you can reach.
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check that the spring brakes come on automatically.
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press the brake pedal and listen for any strange noises.
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All of the above.
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17.
If your vehicle has dual parking control valves, you can use pressure from a separate tank to:
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release the spring brakes so you can move the vehicle in an emergency.
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balance the service brakes while you are parked.
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park better.
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None of the above.
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18.
The alcohol evaporator:
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shows how much air pressure you are applying to the brakes.
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ensures the coolant temperature gauge remains in the normal range.
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helps to reduce the risk of ice in air brake valves and other parts in cold weather.
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eliminates the need for daily air tank drainage.
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19.
The safety valve installed in the first tank the air compressor pumps air is set to open:
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if there is too much pressure.
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if there is too little pressure.
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every 15 minutes.
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at 30 psi.
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20.
ABS malfunction lamps are located:
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under the hood.
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on the driver'door.
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on the instrument panel.
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None of the above.
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