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UPGRADE TO CDL PREMIUM
1.
Excessive use of the service brakes results in overheating. Too much heat can:
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cause the brakes apply unevenly.
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cause the brakes to grab.
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make the brakes stop working.
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cause the brakes to squeak.
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2.
When the wheels of a trailer lock up:
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the trailer will tend to swing around.
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ABS will increase stopping power.
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the vehicle will gradually come to a complete stop.
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All of the above.
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3.
When meeting an oncoming vehicle at night, if the other driver does not put their low beams on, you should:
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slow down and look straight ahead in your lane.
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"get back at the other driver" by putting your own high beams on.
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flash your high beams at the other driver.
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look slightly to the right to avoid looking directly at the lights of the oncoming vehicle.
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4.
When using a fire extinguisher, you should stay:
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at least 10 feet away from the fire.
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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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as far away from the fire as possible.
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5.
The Johnson bar is a valve that:
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is installed in the first tank the air compressor pumps air to.
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reduces the braking pressure to a safe level.
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works the trailer brakes.
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keeps air from going out if the air compressor develops a leak.
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6.
The air storage tanks:
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stop the compressor from pumping air.
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are connected to the engine through gears or a v-belt.
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are used to hold compressed air.
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protects the tank and the rest of the system from too much pressure.
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7.
Emergency brakes must be held on by:
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dynamic pressure.
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hydraulic pressure.
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air pressure.
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mechanical force.
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8.
To check that spring brakes come on automatically, the first thing to do is to:
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release the parking brake, move the vehicle forward slowly, and apply the brakes firmly.
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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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turn off the engine, release the parking brake and time the air pressure drop.
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All of the above.
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9.
While driving, you should use your mirrors to:
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check the condition of the tires and cargo.
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check where the rear of your vehicle is while you make turns.
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know where other vehicles are around you.
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All of the above.
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10.
In air-operated disc brakes, the pressure of the ______ on the ______ turns a "power screw".
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slack adjuster; tie rod
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brake camshaft; tie rod
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slack adjuster; cam roller
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brake chamber; slack adjuster
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