NM CDL COMBINATION TEST - PRACTICE TEST
11.
Most heavy vehicles require ________ change gears.
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double shifting
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single clutching
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double clutching
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12.
Which of these is more likely to rollover due to the "crack-the-whip" effect?
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The last trailer of doubles
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The last trailer of triples
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The front trailer of 65 ft. conventional doubles
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13.
When the trailer breaks away or develops a bad leak, the tractor protection valve will close automatically and:
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the trailer supply valve will stay open.
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the trailer emergency brakes will come on.
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the tractor will lose all air pressure.
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14.
When approaching a vehicle with a distracted driver, you should:
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maintain your safe following distance.
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change lanes quickly.
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quickly pass the vehicle.
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15.
Who is responsible for inspecting the cargo?
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The shipper
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The driver
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The person who loaded and secured the cargo
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16.
When you are driving on a slippery road, you should NOT:
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keep a longer following distance.
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use the engine brake or speed retarder.
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adjust turning and braking to road conditions.
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17.
You are coupling a tractor to a semi-trailer. You have backed up but are not yet under the trailer. Before backing under the semi-trailer, you should:
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supply air to the trailer system and lock the trailer brakes.
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connect the electrical cord and check the air lines.
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begin raising the landing gear.
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18.
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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higher up from the road.
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closer to the ground.
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19.
Poor weight balance:
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can make vehicle handling more difficult.
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improves handling.
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increases fuel efficiency.
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20.
Over-length loads:
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may require special equipment such as "wide load" or flags.
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require special transit permits.
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All of the above.
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