COMBINATION TEST SOUTH DAKOTA - PRACTICE TEST
11.
Which of the following is NOT part of the procedure to stop a trailer skid?
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Releasing the brakes
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Using the trailer hand brake to get traction back
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Recognizing the skid
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Not using the hand brake
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12.
When you turn suddenly while pulling doubles, which trailer is most likely to turn over?
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The front trailer is twice as likely to turn over as the tractor.
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The rear trailer is twice as likely to turn over as the tractor.
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All trailers are equally likely to turn over.
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None of the above.
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13.
Weight that is loaded so there is a high center of gravity:
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makes a vehicle easier to handle.
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causes greater chance of rollover.
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reduces the chance that the load will shift to the side or fall off.
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All of the above.
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14.
Banked curves:
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have a safe "design speed".
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can be taken at any speed.
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should always be avoided.
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are reserved for pedestrians.
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15.
If you will be transporting hazardous materials that require placards, you must:
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obtain a hazardous materials endorsement.
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obtain a special transit permit.
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ask permission of the local transportation agency.
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transport the materials at night only.
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16.
You are coupling a tractor to a semi-trailer and have backed up but are not yet under the trailer. Before backing under the semi-trailer, you should hook up:
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the landing gear.
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the safety chain.
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the electrical service cable.
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the emergency and service air lines.
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17.
After supplying air to the trailer brake system, you should check the brake system for crossed air lines by:
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checking the air brake system pressure gauge for signs of major air loss.
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shutting the engine off so you can hear the brakes.
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applying and releasing the trailer brakes and listening for the sound of trailer brakes.
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All of the above.
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18.
If driving a heavy vehicle, you should:
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stay in the right lane.
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try to pass other vehicles going uphill.
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avoid braking.
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stay in the left lane.
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19.
A bridge formula permits:
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more maximum axle weight for axles that are far apart.
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less maximum axle weight for axles that are far apart.
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more maximum axle weight for axles that are closer together.
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less maximum axle weight for axles that are close together.
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20.
You should always try to back toward the driver's side because:
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you can watch the rear of your vehicle out the side window.
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you can more easily correct any steering errors.
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backing toward the left side is more dangerous.
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None of the above.
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