DELAWARE CDL AIR BRAKES PRACTICE TEST
11.
How can you tell if your vehicle is equipped with ABS?
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Look under the vehicle for the wheel speed sensor wires coming from the back of the brakes.
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Look for yellow ABS malfunction lamps on the instrument panel.
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Trailers will have yellow ABS malfunction lamps on the left side.
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All of the above.
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12.
Which of the following is NOT part of the drum brake?
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Return spring
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Safety valve
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Brake drum
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Axle
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13.
If the ABS is not working:
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the vehicle will have no brakes.
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the vehicle will have weak brakes.
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you still have normal brake functions.
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None of the above.
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14.
Slack adjusters:
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are the linkage between the operating rod in the brake chamber and drum brakes or disk brakes in an air brake system.
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are used to adjust the brakes on an air-brake system.
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regulate the distance that the air brake has to travel to apply friction to the wheel.
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All of the above.
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15.
The air compressor governor controls:
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when the air compressor will pump air into the air storage tanks.
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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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the air pressure applied to the brakes.
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