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UPGRADE TO CDL PREMIUM
1.
The service line is also called:
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carrier line or control line.
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control line or signal line.
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signal line or air line.
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pressure line or signal line.
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2.
Empty trucks require _____ stopping distances because empty vehicles have ______ traction.
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less; less
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greater; less
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greater; more
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less; more
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3.
Which of the following is NOT a warning sign of fatigue?
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Heavy eyelids
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Frequent blinking
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Trouble remembering the last few miles driven
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Driving at the speed of the traffic
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4.
If ABS is not working:
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you will not have any brakes.
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you should use the parking brake.
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you should use the emergency brake.
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you will still have brakes.
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5.
When backing a trailer on a curved path you should back towards:
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neither side (back up straight).
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the driver's side.
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either side.
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the passenger's side.
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6.
Glad hands are used to:
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connect the brakes from the truck or tractor to the trailer.
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connect the electrical lines from the truck or tractor to the trailer.
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connect the service and emergency air lines from the truck or tractor to the trailer.
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the air compressor is connected to the engine.
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7.
A steering wheel should have no more than _____ of play. If there is more play than this, it may be hard to steer.
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10 degrees
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15 degrees
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It doesn't matter.
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30 degrees
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8.
If your vehicle thumps or vibrates heavily, it may be a sign that:
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the engine belt is loose.
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you need to shift up.
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one of the tires has gone flat.
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the brakes have failed.
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9.
When checking air brakes on combination vehicles, which of the following is NOT part of checking that air flows to all trailers?
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Going to the rear of the rig.
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Opening the emergency line shut-off valve at the rear of the last trailer.
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Pulling tractor forward until the fifth-wheel comes out from under the trailer.
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Using the trailer handbrake to provide air to the service line.
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10.
When the tractor protection valve closes, the trailer _______ brakes will come on.
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parking
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service
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emergency
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hand
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