AIR BRAKES CDL PRACTICE TEST - OKLAHOMA
6.
In a dual air brake system, if one air system is very low on pressure:
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either the front or rear brakes will not be operating fully.
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you should pump the brakes to restore pressure.
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you should drive and brake as you always have.
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7.
Dual tires:
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should always come in contact with each other.
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should not come in contact with each other.
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should come in contact with each other whenever possible.
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8.
Some air brake systems have an alcohol evaporator to:
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reduce the danger of slipping.
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reduce the stopping power of the vehicle.
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prevent ice from forming in the brake system.
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9.
Passive railroad crossings:
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do not have traffic control devices.
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have at least one traffic control device.
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should never be crossed using a CMV.
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10.
When driving on long and/or steep downgrades, to select an appropriate safe speed you should consider:
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the road conditions.
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the total weight of the vehicle and cargo.
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All of the above.
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