AIR BRAKES CDL PRACTICE TEST - ALASKA
16.
Air brakes:
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should be used only when driving on wet roads.
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are prohibited on larger vehicles.
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are an effective way to stop large and heavy vehicles.
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17.
The s-cam forces the brake shoes away from one another and presses them against the inside of the brake drum. It is called the s-cam because:
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it applies a "Shock" to the brakes.
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it is shaped like the letter "S".
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"S" stands for "Shoes".
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18.
The s-cam:
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helps ensure that air flows to all trailers.
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forces the brake shoes away from one another and presses them against the inside of the brake drum.
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pulls the brake shoes away from the drum.
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19.
Emergency brakes and parking brakes must be held on by:
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hydraulic pressure.
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air pressure.
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mechanical force.
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20.
Perception Distance + Reaction Distance + Brake Lag Distance + Braking Distance = ?
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Stopping Distance - (minus) Brake Fade Distance
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Total Stopping Distance
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Total Air Pressure
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