AIR BRAKES CDL PRACTICE TEST - MAINE
11.
Spring brakes are usually held back by:
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modulating control valves.
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air pressure.
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the antilock braking system.
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12.
Truck tractors with air brakes built after March 1, 1997, are required to be equipped with:
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anti-lock brakes.
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hydraulic brakes.
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a rear backup camera.
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13.
Why must air tanks be drained?
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Water can freeze in cold weather and cause brake failure.
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Water and
oil reduce the air pressure.
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To keep from fouling the air compressor oil.
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14.
Which of the following is NOT correct? An ABS system:
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helps you stop faster.
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helps you avoid wheel lock up.
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is a safety anti-skid braking system.
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15.
To avoid becoming a distracted driver you should:
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not turn off all communication devices.
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adjust all vehicle controls and mirrors while driving.
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not engage in complex conversations with others.
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