CDL AIR BRAKES PRACTICE TEST - DISTRICT OF COLUMBIA
16.
A dual air brake system:
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has two separate air brake systems, which use two separate sets of brake controls.
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has two separate air brake systems, which use a single set of brake controls.
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has a single air brake system, which uses a single set of brake controls.
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has a single air brake system, which uses two separate sets of brake controls.
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17.
The most common type of brake is the:
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G-cam disc brake
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R-cam drum brake
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B-cam disc brake
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S-cam drum brake
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18.
When you release the brake pedal, the _____ rotates back and a spring pulls the brake shoes away from the drum.
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hydraulic brake system
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air compressor belt
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S-cam
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pressure gauge
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19.
ABS malfunction lamps are located:
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on the driver'door.
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on the instrument panel.
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under the hood.
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None of the above.
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20.
An anti-lock braking system (ABS):
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helps you avoid skids caused by over braking.
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helps you avoid wheel lock up.
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should help you steer around an obstacle while braking.
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All of the above.
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