CDL DOUBLES PRACTICE TEST TEXAS
11.
If your trailer starts to skid, you should:
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release the brakes.
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steer in the opposite direction.
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pump the brakes.
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lock the brakes.
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12.
When parked on the side of the road, you should:
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turn off all lights.
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activate the right turn signal.
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flash your brake lights.
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use the 4-way emergency flashers.
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13.
During freezing weather, which area is most likely to be slippery after it rains?
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Roads that look wet.
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Bridges.
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Shaded areas.
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All of the above.
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14.
To prevent rollover, you should:
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keep the cargo as close to the ground as possible.
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put the lightest parts of the cargo under the heaviest parts.
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place the cargo near the front of the trailer.
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place the cargo near the rear of the trailer.
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15.
Dual tires:
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should not come in contact with each other.
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are dangerous.
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should always come in contact with each other.
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should come in contact with each other whenever possible.
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16.
It may not be safe to operate at legal maximum weights:
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on two-way streets.
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on highways.
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in hot weather.
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during bad weather or in mountains.
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17.
When the trailer breaks away or develops a bad leak, the tractor protection valve will close automatically and:
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the tractor will lose all air pressure.
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the trailer supply valve will stay open.
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the engine will shut down.
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the trailer emergency brakes will come on.
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18.
To know how much space you should keep in front of you when driving at speeds below 40 mph, one good rule says you need at least ______ for each ______ of vehicle length.
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3 seconds; 50 feet
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2 seconds; 10 feet
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1 second; 10 feet
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1 second; 5 feet
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19.
When you double your speed, the braking distance is:
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2 times longer.
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3 times longer.
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4 times longer.
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the same.
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20.
When driving on slippery roads, you should NOT:
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try to anticipate stops early.
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go slowly.
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use the engine brake.
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watch far enough ahead to keep a steady speed.
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