AIR BRAKES CDL PRACTICE TEST - ALABAMA
21.
Antifreeze:
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doesn't help the engine in any way.
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helps the engine only when the temperature is below freezing.
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helps the engine under hot conditions as well as cold conditions.
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helps the engine only under hot conditions.
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22.
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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release the parking brake valve and begin reducing the air pressure by stepping on and off the brake pedal.
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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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All of the above.
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23.
Weight that is loaded so there is a high center of gravity:
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makes a vehicle easier to handle.
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causes greater chance of rollover.
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reduces the chance that the load will shift to the side or fall off.
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All of the above.
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24.
Spring brakes are usually held back by:
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air pressure.
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modulating control valves.
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the brake pedal.
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the antilock braking system.
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25.
Why should you check your mirrors regularly to know where other vehicles are around you?
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To flash the brake lights if you are being tailgated.
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To move out of their way if they want to get past.
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To better assess your own speed.
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To know whether you can make a quick lane change in an emergency.
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