AIR BRAKES CDL PRACTICE TEST - NEW JERSEY
11.
If your vehicle is equipped with air brakes, loss of air pressure in the
emergency line causes:
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the trailer spring brakes to come on.
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the speed of your vehicle to increase.
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the trailer emergency brakes to come on.
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All of the above.
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12.
The service brake applies and releases:
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the brake in an emergency situation.
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the parking brake when you use the parking brake control.
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the brake when you use the brake pedal during normal driving.
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None of the above.
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13.
The ______ puts alcohol into the air system.
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alcohol tank drains
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alcohol evaporator
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air tank drains
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alcohol storage tank
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14.
Hydroplaning is more likely if:
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tire tread is worn.
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the road is wet.
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tire pressure is low.
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All of the above.
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15.
Some vehicles have a separate air tank which can be used to:
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release the spring brakes.
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hold the vehicle or combination of vehicles stationary.
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turn on the 4-way emergency flashers.
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unload cargo or passengers.
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