AIR BRAKES CDL PRACTICE TEST - COLORADO
11.
Why should you check your mirrors regularly to know where other vehicles are around you?
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To know whether you can make a quick lane change in an emergency.
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To flash the brake lights if you are being tailgated.
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To better assess your own speed.
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To move out of their way if they want to get past.
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12.
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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15 mph
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20 mph
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5 mph
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13.
In vehicles with air brakes, the air compressor governor:
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controls how much air the air compressor will pump into the air storage tanks.
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controls when the air storage tanks will pump air into the air compressor.
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controls when the air compressor will pump air into the air storage tanks.
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None of the above.
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14.
If the spring brakes do not release when you push the trailer air supply control, you should:
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rev or
lug the engine.
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pump the brakes.
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check the air line connections.
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check the electrical cables.
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15.
Axle weight is:
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the weight transmitted to the ground by one axle or one set of axles.
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the value specified by the manufacturer as the loaded weight of one axle.
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the weight of all the axles added together.
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the maximum safe weight your tires can carry at a specified pressure.
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