MAINE CDL AIR BRAKES PRACTICE TEST
11.
Which of the following is NOT TRUE? When you drive a tractor-trailer combination with ABS, you should:
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monitor your tractor and trailer as you slow down, and if it is safe to do so, back off the brakes to stay in control.
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drive slower to keep your vehicle in a straight line.
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brake the same way, regardless of whether you have ABS on the tractor, the trailer, or both.
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12.
The service brake applies and releases:
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the brake in an emergency situation.
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the parking brake when you use the parking brake control.
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the brake when you use the brake pedal during normal driving.
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13.
Vehicles with ABS have ______ ABS malfunction lamps on the instrument panel.
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orange
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yellow
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green
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14.
If the ABS is not working:
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you still have normal brake functions.
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the vehicle will have weak brakes.
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the vehicle will have no 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 should put the parking brake on and gently pull against it in a low gear.
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