NE CDL DOUBLES TRIPLES PRACTICE TEST
11.
Strong winds can make it difficult to stay in your lane, especially when:
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coming out of tunnels.
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going into tunnels.
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driving at speeds below 40 mph.
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driving alongside other vehicles.
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12.
The tractor protection valve:
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keeps your wheels from locking up when you brake hard.
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keeps air in the brake system should the trailer develop a bad leak.
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prevents the trailer from being accidentally released.
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keeps air from going out if the air compressor develops a leak.
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13.
At night, when the load on a vehicle extends 4 feet or more beyond the rear of the body, there must be _______ at the end of the load.
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2 lit red lights
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2 red flags
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a fluorescent orange flag
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All of the above.
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14.
Alcohol:
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improves reaction time.
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does not affect judgement.
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improves muscle coordination.
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impairs depth perception.
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15.
Why should you cover your cargo?
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To protect people from spilled cargo.
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To protect the cargo from weather.
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Because spill protection is a safety requirement in many states.
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All of the above.
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16.
When you push in the red trailer air supply knob, this will:
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supply air to the emergency supply lines.
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open the emergency line shut-off valve at the rear of the last trailer.
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disconnect the air lines from the trailer.
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disconnect the electrical connector.
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17.
When driving in extremely hot weather, if the air pressure in the tires is too high, you should:
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let air out of the tires to decrease pressure.
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stop and remain stopped until the tires cool off.
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continue driving.
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call your supervisor.
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18.
To prevent rollover, you should do all of the following except:
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keep the load centered on your rig.
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put the lightest parts of the cargo under the heaviest parts.
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avoid quick lane changes.
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drive slowly around turns.
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19.
After an accident, an improper use of flares could cause:
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the springs to put on the brakes.
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a fire if spilled fuel is on the ground.
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air pressure to build from 50 to 100 psi within 2 minutes.
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the vehicle to slide back and forth.
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20.
Air storage tanks:
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hold compressed air for the brakes.
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pump air into the air storage tanks.
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are installed in the first tank the air compressor pumps air to.
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use parts of the service brake systems to stop the vehicle in a brake system failure.
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