CDL AIR BRAKES PRACTICE TEST - LOUISIANA
11.
Which of the following is not a type of retarder?
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Pressure
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Electric
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Exhaust
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Hydraulic
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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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20 mph
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15 mph
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5 mph
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13.
If you are driving a 30-foot vehicle at 55 mph, you should leave at least _____ between you and the vehicle ahead.
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2 seconds
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3 seconds
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4 seconds
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5 seconds
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14.
When coupling, you should:
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be aware that wrong coupling and uncoupling can be very dangerous.
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make sure the sliding fifth-wheel is locked.
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make sure the trailer wheels are not chocked.
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make sure the trailer kingpin is bent.
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15.
If your ABS malfunctions:
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you still have normal brake functions.
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the parking brakes will not work.
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the service brake will not work.
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you should immediately come to a complete stop.
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