NEBRASKA CDL DOUBLES TRIPLES PRACTICE TEST
11.
Which of the following vehicles is most likely to turn over?
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5 axle tractor semitrailer
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3 axle tractor semitrailer
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65 ft. conventional double
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Triple trailer
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12.
When driving in very hot weather, you may have to:
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reduce your speed to prevent overheating.
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decrease your following distance.
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watch out for black ice.
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increase your speed until the tires cool off.
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13.
When you discover a fire, if the trailer doors are hot you should not open them because:
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the temperature of the trailer should not be changed in any way.
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opening the doors lets air in and may make the fire flare up.
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with air many fires do less damage.
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you should use the fire extinguisher on the door.
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14.
Doubles:
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are easier to drive than straight trucks.
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require more reaction time than straight trucks.
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are less likely to rollover than straight trucks.
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None of the above.
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15.
Texting while operating a commercial motor vehicle is:
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illegal.
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only allowed at night.
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acceptable if you are contacting your supervisor.
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acceptable if you are contacting your dispacther.
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16.
On dry pavement, the braking distance when traveling at 55 mph is about:
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216 feet.
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419 feet.
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61 feet.
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142 feet.
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17.
When transporting cargo, cargo securement must be checked within the first _____ miles of a trip and every _____ miles after.
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100; 150
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50; 250
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50; 150
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150; 250
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18.
To reduce the chance of rollover, you should:
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place the cargo as high as possible inside the trailer.
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distributed the cargo as low as possible inside the trailer.
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put the lightest parts of the cargo under the heaviest parts.
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None of the above.
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19.
You should be especially alert for drunk drivers:
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late at night.
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in the early evening.
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around shopping areas.
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in the morning.
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20.
Before driving a vehicle with a dual air system, allow time for the air compressor to build up a minimum of ____ pressure in both the primary and secondary systems.
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100 psi
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75 psi
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50 psi
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25 psi
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