COMBINATION PRACTICE TEST - AZ CDL
11.
When you are uncoupling a loaded trailer, lower the landing gear until:
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makes contact with the ground, and leave the trailer off the fifth wheel.
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it makes firm contact with the ground.
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the tractor frame is under the trailer.
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12.
With brake drums, if brakes become too hot:
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the brakes will supply too much power to the drive wheels.
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the brakes may stop working.
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your ABS will malfunction.
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13.
What is a tractor jackknife?
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When a drive-wheel skid lets the trailer push the towing vehicle sideways.
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When the wheels of a trailer lock up, and the trailer swings around.
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None of the above.
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14.
On any upgrade, gravity:
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speed you up.
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slows you down.
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doubles your speed.
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15.
When backing a trailer, turn the wheel right to make the cab go ________ and the trailer go ________.
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left; left
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right; left
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left; right
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16.
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 trailer wheels are not chocked.
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make sure the trailer kingpin is bent.
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17.
When looking at your cargo covers in the mirrors while driving, you must be aware that a flapping cover:
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can tear loose, uncovering the cargo.
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helps keep the cargo as close to the ground as possible.
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keeps the cargo cool.
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18.
Rollovers happen when drivers:
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brake too hard.
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turn too slowly.
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turn too fast.
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19.
Weight that is loaded so there is a high center of gravity:
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makes a vehicle easier to handle.
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reduces the chance that the load will shift to the side or fall off.
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causes greater chance of rollover.
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20.
After a tire has been changed, the driver should stop a short while later to:
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deflate the tire to 10 psi.
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decrease tire pressure.
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check the tightness of the nuts.
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