AIR BRAKES CDL PRACTICE TEST - IOWA
21.
An alcohol evaporator:
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used to reduce the chance of the front wheels skidding.
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is used to reduce the risk of ice in air brake valves and other parts during cold weather.
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protects the air brake system from too much pressure.
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22.
If you are feeling sleepy, you should:
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pull off the road and rest.
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get some coffee.
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slow down.
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23.
When confronted by an aggressive driver, you should:
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call the police, if you have a cell phone and can do it safely.
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avoid eye contact.
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All of the above.
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24.
The air tanks should be drained completely to remove:
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water and oil.
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carbon monoxide.
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air.
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25.
On front tires, tread should be at least:
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2/32 inch
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4/16 inch
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4/32 inch
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