IOWA CDL AIR BRAKES PRACTICE TEST
11.
If the air compressor is belt-driven, you should check the air compressor drive belt before each trip. The belt should be:
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loose.
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tight.
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cracked.
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12.
When using a fire extinguisher, you should stay:
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at least 10 feet away from the fire.
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as close to the fire as possible, without getting burnt.
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as far away from the fire as possible.
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13.
Axle weight is:
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the weight of all the axles added together.
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the weight transmitted to the ground by one axle or one set of axles.
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the maximum safe weight your tires can carry at a specified pressure.
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14.
When the spring brakes are on, you should:
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not push the brake pedal down.
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pump the brakes.
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press the accelerator.
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15.
To test the low pressure warning signal, you should:
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shut the engine off when you have enough air pressure, turn the electrical power on and step on and off the brake pedal until the low air pressure warning signal comes on.
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pump the brakes while your vehicle is running.
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check the air hoses connected to the brake chambers to make sure they aren't cut.
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