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UPGRADE TO CDL PREMIUM
1.
The tire load rating is stated:
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on the side of each tire.
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inside the suspension system.
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on each axle.
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2.
The iron trailer supports are up, and the full weight of the trailer is resting on the tractor. Make sure:
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there is enough clearance between the rear of the tractor frame and the landing gear.
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the safety latch is not engaged.
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you are in a low enough gear.
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3.
When you are uncoupling a loaded trailer, lower the landing gear until:
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the tractor frame is under the trailer.
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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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4.
Which of the following makes a rollover more likely?
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If the load is to one side so it makes a trailer lean.
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Weight that is loaded so there is a high center of gravity.
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All of the above.
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5.
When you use your mirrors while driving on the road, you should:
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check them quickly.
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only use the driver's side mirror.
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avoid checking them regularly.
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6.
When backing a trailer, you should:
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pull-up frequently to reposition the vehicle.
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turn the steering wheel toward the direction you want to go.
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not back up in a straight line.
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7.
Do not use the trailer hand valve in driving because:
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the trailer emergency brakes will come on.
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of the danger of making the trailer skid.
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All of the above.
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8.
You are coupling a tractor to a semi-trailer. You have backed up but are not yet under the trailer. Before backing under the semi-trailer, you should:
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supply air to the trailer system and lock the trailer brakes.
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begin raising the landing gear.
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connect the electrical cord and check the air lines.
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9.
When should you use the hand valve to park a combination vehicle?
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When parking downhill.
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Never.
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To park at loading docks.
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10.
To unlock the fifth wheel, pull the release handle to the _______ position.
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open
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closed
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neutral
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