1.
If your trucks has a high center of gravity, which of the following is true for curves?
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Reduce your speed to a crawl.
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You should slow down, as your truck can roll over at the posted speed limit for the curve.
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You should travel at the posted speed limit.
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None of the above.
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2.
In vehicles with air brakes, water and compressor oil in the bottom of the air tank:
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should not be removed.
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should be added regularly.
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should be drained completely.
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None of the above.
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3.
Supply pressure gauges tell you:
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when the pressure in the system drops below 60 psi.
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when the air pressure in the tanks falls below 60 psi.
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how much air pressure you are applying to the brakes.
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how much pressure is in the air tanks.
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4.
When confronted by an aggressive driver, you should:
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call the police, if you have a cell phone and can do it safely.
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avoid eye contact.
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make every attempt to get out of their way.
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All of the above.
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5.
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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6.
In air-operated disc brakes, the pressure of the ______ on the ______ turns a "power screw".
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brake camshaft; tie rod
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slack adjuster; cam roller
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slack adjuster; tie rod
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brake chamber; slack adjuster
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7.
The parking or emergency brakes of trucks or buses must be held on by:
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spring pressure.
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fluid pressure.
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air pressure.
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hydraulic pressure.
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8.
When you push the brake pedal down, air brakes work:
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only when ABS is working.
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after a short delay.
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immediately.
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after about 15 seconds.
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9.
A dual air brake system:
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has two separate air brake systems, which use a single set of brake controls.
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has a single air brake system, which uses two separate sets of brake controls.
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has two separate air brake systems, which use two separate sets of brake controls.
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has a single air brake system, which uses a single set of brake controls.
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10.
If air pressure does not build up fast enough:
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the pressure may drop too low during driving.
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you may be forced to turn off the engine and release the parking brake.
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you should turn the electrical power on and step on and off the brake pedal.
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you should put the parking brake on and gently pull against it in a low gear.
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