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1.
When backing a trailer, you should:
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not back up in a straight line.
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pull-up frequently to reposition the vehicle.
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avoid braking.
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turn the steering wheel toward the direction you want to go.
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2.
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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the pressure in the system is above 55 psi.
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the tractor frame is under the trailer.
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it makes firm contact with the ground.
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3.
Dual tires:
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should come in contact with each other whenever possible.
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should not come in contact with each other.
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are dangerous.
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should always come in contact with each other.
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4.
You supply air to the trailer brake system by:
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pulling out the trailer air supply valve.
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pushing in the trailer air supply knob.
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connecting the tractor service air line to the trailer service glad hand.
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plugging the electrical cord into the trailer.
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5.
Which of the following is NOT part of testing the tractor protection valve?
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Shutting off the engine.
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Stepping on and off the brake pedal several times to reduce the air pressure in the tanks.
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Pulling forward slowly, then applying the trailer brakes.
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Charging the trailer air brake system.
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6.
When you make a quick lane change, the crack-the-whip effect can:
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improve your traction.
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the trailer to swing wide to the left.
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make it harder to turn without skidding.
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turn the trailer over.
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7.
Tests have shown that trucks with a high center of gravity:
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can roll over if the driver exceeds the posted speed limit for a curve.
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can roll over if the driver slows down before entering a curve.
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can roll over at the posted speed limit for a curve.
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are less likely to roll over when entering a curve.
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8.
Inspecting the fifth-wheel does NOT include:
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making sure that the fifth wheel is in the proper position for coupling.
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checking for missing or damaged parts.
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checking that there are no cracks in the frame.
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backing until the fifth-wheel just touches the trailer.
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9.
When transporting cargo, the cargo should be checked:
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before the trip and after the first 150 miles.
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before the trip and after the first 50 miles.
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only before the trip.
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only after the trip.
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10.
"Bobtail" tractors are:
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tractors with two trailers.
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heavily loaded trailers.
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tractors without semitrailers.
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tractors with a tank.
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