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UPGRADE TO CDL PREMIUM
1.
When more cargo is piled up in a truck, the truck becomes easier to turn over. Fully loaded rigs are _________ to roll over in a crash than empty rigs.
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five times more likely
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ten times more likely
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three times more likely
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2.
After a tire has been changed, the driver should stop a short while later to:
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decrease tire pressure.
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check the tightness of the nuts.
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deflate the tire to 10 psi.
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3.
If ABS is not working:
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you should use the parking brake.
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you will still have brakes.
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you should use the emergency brake.
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4.
Which of the following is NOT part of checking the sliding fifth-wheel?
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Checking that it is properly greased
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Checking that all locking pins are present and locked in place
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Testing the tractor protection valve
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5.
If the drive wheels begin to spin when accelerating, you should:
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take your foot off the accelerator.
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continue to accelerate.
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brake gently.
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6.
A red triangle with an orange center means:
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The vehicle is hauling hazardous materials
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Slow-moving vehicle
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Law enforcement vehicle
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7.
A burning tire must be:
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covered with cloth.
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immediately removed from the vehicle.
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cooled with water.
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8.
When connecting the glad hands, you should press the two seals together with the couplers at a ______ angle to each other.
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30 degree
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45 degree
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90 degree
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9.
If your vehicle thumps or vibrates heavily, it may be a sign that:
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one of the tires has gone flat.
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you need to shift up.
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the brakes have failed.
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10.
Most heavy trucks with manual transmissions require ____ to change gears.
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triple clutching
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single clutching
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double clutching
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