MD CDL COMBINATION PRACTICE TEST
11.
If you unlock the pintle hook with the dolly still under the rear trailer:
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your vehicle might roll away.
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steam and boiling water can spray under pressure.
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the brakes could be damaged by the combined forces of the springs and the air pressure.
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the dolly tow bar may fly up.
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12.
When you make a quick lane change, the crack-the-whip effect can turn the trailer over. The crack-the-whip effect is caused by:
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strong wind.
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worn tire tread.
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rearward amplification.
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the rear trailer of a triple.
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13.
What are the two basic reasons for covering cargo?
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To protect the cargo from weather and to avoid littering.
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To protect the cargo from pilferage and from weather.
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To protect people from spilled cargo and the cargo from pilferage.
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To protect people from spilled cargo and the cargo from weather.
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14.
At passive railroad crossings, even if there are active railroad signals that indicate the tracks are clear, you must _________ to be sure it is safe to proceed.
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listen, look and stop
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go, stop and listen
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stop, look, and listen
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go, look and put the transmission in neutral
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15.
Before entering a curve, you should:
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increase your speed.
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maintain your speed.
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reduce your speed.
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come to a complete stop.
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16.
When inspecting the coupling, make sure ________ between the upper and the lower fifth-wheel.
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there is no space
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there are 10 feet
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there is at least 1 foot
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there are at least 36 inches
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17.
If there is a cargo fire in a van or box trailer, you should:
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keep the doors shut.
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enlist the help of bystanders.
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keep driving until you reach help.
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open the doors, especially if your cargo contains hazardous materials.
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18.
If your truck has automatic transmission, you should downshift:
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whenever road conditions allow.
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when you need to accelerate.
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after entering a curve.
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when going down grades.
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19.
When backing a trailer, you should:
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pull-up frequently to reposition the vehicle.
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turn the steering wheel toward the direction you want to go.
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avoid braking.
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not back up in a straight line.
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20.
Glad hands are:
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warning devices.
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securement devices.
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coupling devices.
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electronic devices.
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