CDL DOUBLES TRIPLES PRACTICE TEST MARYLAND
11.
In vehicles with air brakes, the air compressor governor:
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controls when the air storage tanks will pump air into the air compressor.
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controls when the air compressor will pump air into the air storage tanks.
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controls how much air the air compressor will pump into the air storage tanks.
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None of the above.
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12.
Which of the following statements is true?
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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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Carrying a properly charged and rated fire extinguisher will help prevent fires.
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Under-inflated tires will NOT cause a vehicle fire.
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13.
If a load is 50 feet long, the minimum number of tie-downs required is:
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4
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3
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10
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5
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14.
Which of the following is NOT a reason for hydraulic brake failure?
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Brake fade on long hills
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Stab braking
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Loss of hydraulic pressure
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All of the above.
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15.
An alcohol evaporator:
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to hold compressed air.
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used to reduce the chance of the front wheels skidding.
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protects the air brake system from too much pressure.
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is used to reduce the risk of ice in air brake valves and other parts during cold weather.
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16.
When making a turn you should:
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make gestures to get the attention of other drivers.
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signal early.
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honk your horn.
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turn the signal off before entering the turn.
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17.
ABS:
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helps you increase your average speed.
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does not decrease your stopping distance.
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helps you increase your following distance.
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improves your visibility at night.
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18.
If the drive wheels start to skid:
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accelerate slightly to regain control.
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use the brakes to slow down.
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push in the clutch to let them turn freely.
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All of the above.
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19.
Before operating the vehicle, the driver should:
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review the last vehicle inspection report.
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rely on the last vehicle inspection and skip the pre-trip inspection.
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should not review the vehicle inspection report and immediately try to find any vehicle defects.
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None of the above.
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20.
When driving a 60-foot truck at 50 mph, your minimum following distance should be:
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7 seconds
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6 seconds
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5 seconds
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3 seconds
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