1.
When checking the lights before driving:
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you should check them from inside the vehicle.
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the engine must be running.
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you should turn off the engine.
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make sure the parking brake is not set.
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2.
To use the controlled braking method in an emergency, you should:
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pump the brake pedal 3 times.
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apply the brakes as hard as you can without locking the wheels.
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apply your brakes all the way, and release the brakes when the wheels lock up.
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apply the brakes when the wheels lock up.
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3.
Which of the following is NOT a reason for hydraulic brake failure?
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Stab braking
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Loss of hydraulic pressure
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Brake fade on long hills
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All of the above.
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4.
To reduce the chance of rollover, you should:
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distributed the cargo as low as possible inside the trailer.
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place the cargo as high as possible inside the trailer.
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put the lightest parts of the cargo under the heaviest parts.
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None of the above.
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5.
After the pre-trip inspection, drivers should inspect their cargo and its securing devices again within ________ after beginning the trip.
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50 miles
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20 miles
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25 miles
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two hours
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6.
You are driving a double. Before entering traffic, you should:
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always come to a complete stop.
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turn on your headlights.
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make sure you have a large enough gap before entering or crossing traffic.
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assume there is enough room to merge into traffic.
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7.
If the safety relief valve in the air brake system releases air:
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this will supply more power to the brakes.
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this will supply more power to the drive wheels.
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the valve is fully operational.
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something is wrong.
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8.
Before connecting the converter dolly to the rear trailer, make sure that:
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the kingpin rests on the fifth-wheel.
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the locking jaws rest on the kingpin.
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the shut-off valves at the rear of the first trailer are open.
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the trailer height is slightly lower than the center of the fifth-wheel.
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9.
In a combination vehicle, ________ is most likely to turn over.
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the last trailer
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the trailer behind the tractor
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the tractor
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All of the above.
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10.
Excessive use of the service brakes results in overheating. Too much heat can:
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cause the brakes to grab.
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cause the brakes apply unevenly.
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make the brakes stop working.
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cause the brakes to squeak.
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