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UPGRADE TO CDL PREMIUM
1.
Most heavy vehicles require ________ change gears.
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triple shifting
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double clutching
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double shifting
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single clutching
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2.
Parking brakes are:
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not required on commercial vehicles with air brakes.
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required on all vehicles.
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not required on trailers.
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not required on buses.
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3.
If your trucks has a high center of gravity, which of the following is true for curves?
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You should slow down, as your truck can roll over at the posted speed limit for the curve.
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You should travel at the posted speed limit.
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Reduce your speed to a crawl.
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None of the above.
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4.
Slack adjusters:
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regulate the distance between the rear wheels.
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are available in four types: manual, automatic, robotic and analog.
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should move more than one inch where the push rods attach to them.
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regulate the distance that the air brake has to travel to apply friction to the wheel.
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5.
A low air pressure warning signal must come on when the air pressure in the tanks falls below:
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15 psi.
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10 psi.
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60 psi.
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100 psi.
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6.
When going down a steep downgrade, you should:
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use the parking brake.
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use escape ramps whenever possible.
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use a low gear, and a proper braking technique.
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avoid braking and rely on engine braking.
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7.
Too little weight on the driving axles can cause:
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poor visibility.
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longer stopping distances.
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mechanical damage.
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poor traction.
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8.
Which of the following is NOT a warning sign of fatigue?
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Trouble remembering the last few miles driven
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Frequent blinking
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Heavy eyelids
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Driving at the speed of the traffic
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9.
When backing, you should:
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back quickly.
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use the mirrors on both sides.
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only use mirror on the driver's side.
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back and turn toward the right side whenever possible.
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10.
When a tire fails, you must:
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get out and check all the tires after you have come to a stop.
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hold the steering wheel firmly.
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stay off the brake.
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All of the above.
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