CDL Air Brakes Practice Test - Utah
11.
An ABS system:
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gives you more control over the vehicle during braking.
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helps you avoid skids caused by over braking.
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keep your wheels from locking when you brake hard.
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All of the above.
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12.
You can be sure that your vehicle is equipped with ABS:
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if the vehicle was manufactured after 1998.
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if the vehicle was manufactured after 2010.
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if the vehicle was manufactured after 2000.
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if your company requires the use of antilock brakes in its policies.
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13.
With the air pressure built up to governor cutoff, the maximum leakage rates per minute are ___ psi for single vehicles and ___ psi for a combination of 2 vehicles.
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3; 2
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4; 5
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3; 4
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5; 6
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14.
To operate a vehicle equipped with air brakes, you must pass the air brakes knowledge test. Why?
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If you don't pass the air brakes test, you can't get a CDL.
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If you don't, you will only receive a CDL permit.
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All trucks have air brakes.
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If you don't pass the air brakes test, you will be restricted to driving vehicles without air brakes.
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15.
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 should turn the electrical power on and step on and off the brake pedal.
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you may be forced to turn off the engine and release the parking brake.
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you should put the parking brake on and gently pull against it in a low gear.
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