ME CDL AIR BRAKES PRACTICE TEST
11.
You are going down a steep grade. Once the vehicle is in the proper low gear, you should brake just hard enough to feel a slowdown, and then release the brakes when your speed has been reduced to ____ below your safe speed.
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10 mph
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5 mph
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15 mph
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12.
You should drain the air tanks completely. If water and oil collect in the air tanks:
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your brakes could become hard to press.
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your brakes could fail.
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your brakes could heat up.
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13.
The safety valve is usually set to open at:
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150 psi.
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200 psi.
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100 psi.
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14.
The low pressure warning signal will generally activate when the air pressure falls between:
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55–75 psi.
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85–100 psi.
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80–85 psi.
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15.
After a tire has been changed, the driver should stop a short while later to:
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decrease tire pressure.
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check the tightness of the nuts.
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deflate the tire to 10 psi.
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