AIR BRAKES CDL PRACTICE TEST - WASHINGTON
6.
The use of brakes on a steep downgrade is:
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the main braking factor.
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a supplement to the braking effect of the engine.
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much more effective than the engine braking effect.
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7.
Which of the following is NOT part of the air brake system?
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Emergency brake system
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Anti-lock brake system
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Parking brake system
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8.
Which of the following is NOT a way to determine if your trailer is equipped with ABS (antilock braking system)?
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It has yellow ABS malfunction lamps.
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The letters "ABS" are printed on the side of the steering wheel.
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It was built after March 1, 1998.
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9.
Radial and bias-ply tires:
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should be used together.
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should be used together only when driving in packed snow.
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should not be used together.
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10.
The trailer hand valve should:
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never be used for parking.
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never be used to test the trailer brakes.
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be used in driving.
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