CDL DOUBLES PRACTICE TEST MARYLAND
11.
Which of the the following statements about fatigue is true?
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Fatigue may cause you to not see and react to hazards.
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Fatigue impairs your vision and judgment.
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Fatigued driving is one of the leading causes of accidents.
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All of the above.
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12.
Which of the following will off-track the most?
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The front wheels of the last trailer.
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The front wheels of the tractor.
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The rear wheels of the tractor.
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The rear wheels of the last trailer.
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13.
Which of these statements about brakes is true?
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To stop, the brake shoes and linings are pushed against the outside of the drum.
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The lighter the vehicle, the more heat the brakes absorb to stop it.
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Brake fade does not result from excessive heat.
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None of the above.
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14.
Texting while operating a commercial motor vehicle is:
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illegal.
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acceptable if you are contacting your dispacther.
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acceptable if you are contacting your supervisor.
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only allowed at night.
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15.
Retarders:
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reduce braking distance.
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help slow a vehicle, reducing the need for using brakes.
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reduce the danger of slipping.
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improve gas mileage.
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16.
If an item placed on a flatbed trailer is 7 feet long, it should have __ tie-downs.
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2
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1
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3
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7
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17.
Which of the following is not proper tie-down equipment:
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Ropes
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Straps
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Chains
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Bungee cords
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18.
The earliest way to recognize that your trailer has started to skid is:
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by hearing squeaking noises from the wheels.
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by checking the jackknife sensor.
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by checking your mirrors.
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by releasing the brakes.
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19.
When backing, you should:
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only use mirror on the driver's side.
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back quickly.
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use the mirrors on both sides.
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back and turn toward the right side whenever possible.
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20.
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 engine will shut down.
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the tractor will lose all air pressure.
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