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UPGRADE TO CDL PREMIUM
1.
The total stopping distance for vehicles with air brake systems is made up of __ different factors.
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5
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3
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4
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2
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2.
If you are being tailgated, you should:
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try to let the other vehicle pass.
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drive on the shoulder.
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turn on your taillights.
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speed up.
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3.
To prevent rollover, you should:
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place the cargo near the rear of the trailer.
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place the cargo near the front of the trailer.
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keep the cargo as close to the ground as possible.
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put the lightest parts of the cargo under the heaviest parts.
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4.
Foundation brakes are used:
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only with the rear wheels.
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at each wheel.
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only with the right wheels.
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only with the front wheels.
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5.
To check the slack adjusters on S-cam brakes, you should:
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park on level ground, chock the wheels and release the parking brakes, then use gloves and pull hard on each slack adjuster that you can reach.
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park on level ground and fan off the air pressure by rapidly applying and releasing the foot brake.
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release the parking brake valve and begin reducing the air pressure by stepping on and off the brake pedal.
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All of the above.
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6.
After supplying air to the trailer brake system, you should check the brake system for crossed air lines by:
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applying and releasing the trailer brakes and listening for the sound of trailer brakes.
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shutting the engine off so you can hear the brakes.
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checking the air brake system pressure gauge for signs of major air loss.
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All of the above.
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7.
To check that spring brakes come on automatically, the first thing to do is to:
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turn off the engine, release the parking brake and time the air pressure drop.
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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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All of the above.
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8.
An ABS system:
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gives you more control over the vehicle during braking.
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keep your wheels from locking when you brake hard.
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helps you avoid skids caused by over braking.
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All of the above.
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9.
Some vehicles have a separate air tank which can be used to:
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hold the vehicle or combination of vehicles stationary.
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unload cargo or passengers.
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turn on the 4-way emergency flashers.
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release the spring brakes.
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10.
ABS:
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improves your visibility at night.
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may cause your wheels to lock when you break hard.
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helps you avoid skids caused by over braking.
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helps you stop faster.
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