WASHINGTON CDL AIR BRAKES PRACTICE TEST
16.
The service brake applies and releases:
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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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the brake in an emergency situation.
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17.
The alcohol evaporator:
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ensures the coolant temperature gauge remains in the normal range.
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eliminates the need for daily air tank drainage.
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helps to reduce the risk of ice in air brake valves and other parts in cold weather.
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18.
In newer vehicles with air brakes, you put on the parking brake:
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placing the transmission in Park.
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using a P-shaped, yellow control knob.
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using a diamond-shaped, yellow, push-pull control knob.
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19.
In combination vehicles with air brakes, the trailer air supply control should pop out when the air pressure falls within the range of:
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10 to 20 psi
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100 to 120 psi
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20 to 45 psi
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20.
Combination vehicles have __ air lines.
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2
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3
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1
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