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UPGRADE TO CDL PREMIUM
1.
To prevent rollover, you should:
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keep the cargo as close to the ground as possible.
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go slowly around turns.
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All of the above.
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2.
When you apply the brakes, the brake shoes and linings are pushed against:
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the S-cam.
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the supply pressure gauge.
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None of the above.
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3.
When the spring brakes are on, you should push the brake pedal down:
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Only when driving uphill.
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Only when driving downhill.
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Never.
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4.
How should you apply the brakes when going down a steep downgrade?
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Apply the brakes whenever you reach your safe speed, until your speed has been reduced to 5 mph below your safe speed.
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Apply the brakes when you reach the bottom of the downgrade.
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Apply the brakes as hard as you can without locking the wheels.
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5.
If you are being tailgated, you should:
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move to the left lane.
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speed up.
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increase your following distance.
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6.
In combination vehicles with air brakes, the trailer air supply control should pop out when the air pressure falls within the range of:
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10 to 20 psi
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100 to 120 psi
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20 to 45 psi
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7.
Before driving a vehicle with a dual air brake system, you should allow time for the air compressor to build up a minimum of ____ pressure in both the primary and secondary systems.
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100 psi
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50 psi
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150 psi
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8.
When going down a steep downgrade, you should:
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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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use the parking brake.
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9.
You hear a loud "bang" which sounds like a tire blowout. You should:
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check the tires at the next stop.
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keep driving as normal.
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assume you
have a tire failure.
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10.
When the spring brakes are on, you should:
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press the accelerator.
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not push the brake pedal down.
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pump the brakes.
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