DOUBLES TRIPLES TEST OR - CDL PRACTICE TEST
11.
When coupling twin trailers, the more heavily loaded semitrailer should:
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have its brakes locked.
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be in the rear.
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be in first position behind the tractor.
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have chocked wheels.
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12.
When driving, you should check mirrors regularly to know where other vehicles are around you. Remember that:
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convex mirrors make things look larger and closer than they really are.
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every registered motor vehicle must have at least one mirror.
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there are blind spots that your mirrors cannot show you.
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you should check your after the start of any trip to make sure they are properly adjusted.
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13.
When driving in hot weather, drivers should inspect tires:
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every 3 hours or every 75 miles.
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every 4 hours or every 200 miles.
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every 2 hours or every 100 miles.
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every hour or every 50 miles.
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14.
While crossing railroad tracks, you should:
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shift down.
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not shift gears.
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stop, then look and listen for the train.
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shift up.
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15.
Before connecting the converter dolly to the rear trailer, make sure that:
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the shut-off valves at the rear of the first trailer are open.
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the kingpin rests on the fifth-wheel.
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the trailer height is slightly lower than the center of the fifth-wheel.
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the locking jaws rest on the kingpin.
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16.
With low beams, drivers can see ahead about:
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15 feet
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100 feet
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150 feet
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250 feet
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17.
You should flash your brake lights to warn drivers behind you when:
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you see a hazard that will require slowing down.
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you see you'll need to slow down.
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you see a bus stops in the roadway ahead to unload passengers.
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All of the above.
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18.
When you turn suddenly while pulling doubles, which trailer is most likely to turn over?
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The rear trailer is twice as likely to turn over as the tractor.
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All trailers are equally likely to turn over.
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The front trailer is twice as likely to turn over as the tractor.
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None of the above.
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19.
When driving at night you should dim your lights when following another vehicle within:
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100 feet.
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50 feet.
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1 mile.
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500 feet.
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20.
Your vehicle has hydraulic brakes. When you press the brake pedal while driving and the pedal goes to the floor, remember that:
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the parking brake should never used to slow the vehicle.
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pumping the brake pedal may generate enough hydraulic pressure to stop the vehicle.
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shifting into neutral may help slow the vehicle.
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All of the above.
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