VIRGINIA DOUBLES TRIPLES PRACTICE CDL TEST
11.
Air tank drains:
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protect the tanks and the rest of the system from too much pressure.
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should not be used in wet weather.
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are used to remove water and oil from the air tanks.
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12.
Which of these describes the proper braking technique when driving on a long and steep downgrade?
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Apply the brakes until your speed has been reduced to 5 mph, then release the brakes. When your speed has increased to your safe speed, repeat the previous steps.
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Release the brakes until your speed is 5 mph above your safe speed, then apply the brakes. When your speed has decreased to your safe speed, repeat the previous steps.
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Apply the brakes. When your speed has been reduced to 5 mph below your safe speed, release the brakes. When your speed has increased to your safe speed, repeat the previous steps.
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13.
When coupling a double or triple, ________ should be attached last.
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the trailer right behind the cab.
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the middle trailer.
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None of the above.
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14.
The average driver has a reaction time of:
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1/8 of a second.
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1/32 of a second.
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3/4 second to 1 second.
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15.
If you unlock the pintle hook with the dolly still under the rear trailer:
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the dolly tow bar may fly up.
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the brakes could be damaged by the combined forces of the springs and the air pressure.
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your vehicle might roll away.
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16.
You as a driver should always:
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make emergency plans when you see a hazard.
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reduce your following distance.
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stay in your lane.
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17.
Air tanks usually hold enough compressed air to allow the brakes to be used _________ even if the compressor stops working.
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several times
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for one day
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for one stop
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18.
Radial and bias-ply tires:
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should not be used together.
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should be used together only when driving in packed snow.
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should be used together.
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19.
Which of the following is a reason to cover cargo?
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To protect the cargo from weather
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To protect people from spilled cargo
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All of the above.
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20.
With low beams, drivers can see ahead about:
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250 feet
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15 feet
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100 feet
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