AIR BRAKES CDL PRACTICE TEST - WISCONSIN
16.
Which of the following statements is true?
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Under-inflated tires will NOT cause a vehicle fire.
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Carrying a properly charged and rated fire extinguisher will help prevent fires.
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There is no way that short circuits due to damaged insulation can cause a vehicle fire.
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Poor cargo ventilation is a common cause of fire.
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17.
An anti-lock braking system (ABS):
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helps you avoid wheel lock up.
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helps you avoid skids caused by over braking.
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should help you steer around an obstacle while braking.
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All of the above.
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18.
Why must air tanks be drained?
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To keep from fouling the air compressor oil.
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Water and
oil reduce the air pressure.
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Water can freeze in cold weather and cause brake failure.
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The low boiling point of water reduces braking power.
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19.
Brake fade results from:
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excessive use of the service brakes.
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excessive smoke.
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excessive wear.
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excessive speeding.
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20.
Typically an air system is fully-charged at:
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250 psi
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125 psi
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75 psi
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25 psi
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