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UPGRADE TO CDL PREMIUM
1.
If you are being tailgated, you should:
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avoid quick changes.
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increase your following distance.
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avoid tricks.
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All of the above.
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2.
How do you check that spring brakes come on automatically?
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On single vehicles, continue to step on and off the brake pedal until the parking brake valve pops out.
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On a tractor-trailer combination vehicle, continue to step on and off the brake pedal until the tractor protection valve and the parking brake valve close.
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Continue to step on and off the brake pedal until the air pressure falls to the manufacturer’s specification.
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All of the above.
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3.
Emergency brakes must be held on by:
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hydraulic pressure.
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dynamic pressure.
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mechanical force.
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air pressure.
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4.
Banked curves:
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have a safe "design speed".
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are reserved for pedestrians.
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should always be avoided.
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can be taken at any speed.
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5.
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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6.
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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2 seconds
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5 seconds
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3 seconds
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4 seconds
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7.
When confronted by an aggressive driver, you should:
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avoid eye contact.
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make every attempt to get out of their way.
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call the police, if you have a cell phone and can do it safely.
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All of the above.
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8.
Supply pressure gauges tell drivers:
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how much air pressure they are applying to the brakes.
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how much pressure is in the air tanks.
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how much pressure the relay valves should send to the trailer brakes.
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All of the above.
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9.
An anti-lock braking system (ABS):
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should help you steer around an obstacle while braking.
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helps you avoid wheel lock up.
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helps you avoid skids caused by over braking.
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All of the above.
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10.
Typically an air system is fully-charged at:
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25 psi
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250 psi
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75 psi
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125 psi
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