COLORADO CDL AIR BRAKES PRACTICE TEST
16.
To check that spring brakes come on automatically, the first thing to do is to:
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release the parking brake, move the vehicle forward slowly, and apply the brakes firmly.
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turn off the engine, release the parking brake and time the air pressure drop.
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continue to step on and off the brake pedal until the air pressure falls to the manufacturer’s specification.
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All of the above.
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17.
Why must air tanks be drained?
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The water can freeze in cold weather and cause brake failure.
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There might not be enough antifreeze in the system.
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The alcohol evaporator might stop working.
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Your transmission fluid may drain out.
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18.
The use of air brakes on a steep downgrade is only a supplement to:
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the use of the parking 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 spring brakes.
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19.
If you must stop on a one-way or divided highway, place your warning devices:
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50 feet, 100 feet, and 150 feet toward the approaching traffic.
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10 feet, 50 feet, and 150 feet toward the approaching traffic.
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100 feet, 200 feet, and 300 feet toward the approaching traffic.
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10 feet, 100 feet, and 200 feet toward the approaching traffic.
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20.
Excessive use of the service brakes results in overheating and leads to:
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reduction of the brake drums.
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poor traction.
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brake fade.
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low air pressure.
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