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UPGRADE TO CDL PREMIUM
1.
Air brakes:
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are prohibited on larger vehicles.
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are an effective way to stop large and heavy vehicles.
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can improve fuel efficiency.
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should be used only when driving on wet roads.
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2.
What factors can cause brakes to fade or fail?
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Not taking your foot off the accelerator.
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Overheating, low air pressure or water in the air tanks.
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Going too slow.
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Not pressing the brake pedal hard enough.
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3.
When using a fire extinguisher, you should stay:
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at least 10 feet away from the fire.
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as far away from the fire as possible.
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at whatever distance you think is safe.
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as close to the fire as possible, without getting burnt.
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4.
The spring brakes come on:
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when you lose ABS control.
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when main air pressure is lost.
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when air pressure in both air brake systems rises to a value set by the manufacturer.
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when you bring the vehicle to a complete stop right away.
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5.
Too little weight on the driving axles can cause:
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mechanical damage.
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poor visibility.
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longer stopping distances.
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poor traction.
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6.
When the low air pressure warning light and buzzer first come on, you should:
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immediately put alcohol into the air system.
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downshift and slow down.
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bring the vehicle to a safe stop right away.
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speed up to restore pressure.
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7.
Distracted driving may be caused by _________ while driving.
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listening to music
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maintaining constant speed
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eating
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All of the above.
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8.
Brake lag is:
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the distance your vehicle will continue to travel, in ideal conditions, before you hit the brakes.
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the amount of air pressure required to stop the vehicle.
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the time required for the air brakes to work after the brake pedal is pushed.
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the distance your vehicle will travel, in ideal conditions, while you are braking.
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9.
The emergency brake system:
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uses the parking brake to stop the vehicle in the event of a brake system failure.
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uses the service brake to stop the vehicle in the event of a parking brake system failure.
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uses parts of the service and parking brake systems to stop the vehicle in the event of a brake system failure.
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None of the above.
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10.
If you are driving a 30-foot vehicle at 55 mph, you should leave at least _____ between you and the vehicle ahead.
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4 seconds
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5 seconds
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2 seconds
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3 seconds
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