CDL AIR BRAKES PRACTICE TEST - NEVADA
21.
The use of air brakes on a steep downgrade is only a supplement to:
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the use of the spring brakes.
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the use of the "controlled braking" method.
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the braking effect of the engine.
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the use of the parking brakes.
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22.
The safety relief valve is located:
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on the dashboard.
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in the first tank the air compressor pumps air to.
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in the front brake.
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on each end of the vehicle's axles.
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23.
ABS:
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improves your visibility at night.
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helps you stop faster.
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helps you avoid skids caused by over braking.
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may cause your wheels to lock when you break hard.
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24.
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 is a safe-driving brake.
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it is shaped like the letter "S".
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"S" stands for "Shoes".
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it applies a "Shock" to the brakes.
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25.
The air compressor governor controls:
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when air tank pressure falls below the “cut-out” level.
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the speed of the air compressor.
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when the air compressor will pump air into the air storage tanks.
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the air pressure applied to the brakes.
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