NC CDL COMBINATION TEST - PRACTICE TEST
11.
The trailer hand valve should be used only:
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to test the trailer brakes.
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in driving to prevent skids.
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only in combination with the foot brake.
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when the trailer is fully loaded.
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12.
When driving on slippery surfaces, you should:
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make turns as quickly as possible.
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change lanes often.
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not pass slower vehicles unless necessary.
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All of the above.
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13.
When more cargo is piled up in a truck, the center of gravity moves:
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to the left side of the truck.
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to the right side of the truck.
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higher up from the road.
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closer to the ground.
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14.
Cargo tie-downs are used to:
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prevent skidding.
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prevent right-turn accidents.
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keep cargo from shifting or falling.
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prevent freezing.
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15.
What is the minimum tread depth for tires other than front tires?
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8/32 inch
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4/16 inch
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2/32 inch
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4/32 inch
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16.
Glad hands are:
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warning devices.
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coupling devices.
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securement devices.
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electronic devices.
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17.
If are being followed closely, you should:
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decrease your following distance.
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flash your brake lights.
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increase your following distance.
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change lanes quickly.
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18.
"Bobtail" tractors are:
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tractors with a tank.
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tractors without semitrailers.
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tractors with two trailers.
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heavily loaded trailers.
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19.
When the wheels of a trailer lock up, the trailer will tend to swing around. This is more likely to happen when:
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the trailer is empty or lightly loaded.
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the trailer is overloaded.
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the trailer is fully loaded.
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None of the above.
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20.
A burning tire must be:
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cooled with water.
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covered with cloth.
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immediately removed from the vehicle.
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None of the above.
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