CDL AIR BRAKES PRACTICE TEST - KENTUCKY
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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