CDL DOUBLES TRIPLES PRACTICE TEST KENTUCKY
11.
It may not be safe to operate at legal maximum weights:
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in hot weather.
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on highways.
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during bad weather or in mountains.
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on two-way streets.
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12.
When a tire fails, you should:
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apply the brakes as hard as you can without locking the wheels.
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push the brake pedal down gradually.
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brake in a way that will keep your
vehicle in a straight line.
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stay off the brake.
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13.
When you discover a fire, if the trailer doors are hot you should not open them because:
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you should use the fire extinguisher on the door.
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the temperature of the trailer should not be changed in any way.
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opening the doors lets air in and may make the fire flare up.
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with air many fires do less damage.
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14.
If the drive wheels start to skid:
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use the brakes to slow down.
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accelerate slightly to regain control.
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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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15.
If the air compressor is belt-driven, you should check the air compressor drive belt before each trip. The belt should be:
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cracked.
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worn.
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loose.
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tight.
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16.
Front-end header boards:
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should never be used.
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protect drivers from cargo in case of an accident or emergency stop.
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reduce traction.
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protect drivers from spilled cargo.
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17.
In vehicles with air brakes, the air compressor governor:
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controls when the air compressor will pump air into the air storage tanks.
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controls when the air storage tanks will pump air into the air compressor.
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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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18.
If you have to drive off the road, you should:
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fully apply the brakes until your speed has dropped to about 20 mph.
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brake as hard as you can to maintain control.
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leave the road completely.
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keep one set of wheels on the pavement, if possible.
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19.
Which of the following road surfaces freezes first?
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Bridges
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Open roads
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Parkings
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Underpasses
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20.
Pre-trip inspections are:
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required only for trips of more than 50 miles.
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required by law
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recommended.
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required only for trips of more than 100 miles.
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