SOUTH CAROLINA CDL DOUBLES TRIPLES PRACTICE TEST
11.
When driving in extremely hot weather, if the air pressure in the tires is too high, you should:
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continue driving.
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let air out of the tires to decrease pressure.
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call your supervisor.
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stop and remain stopped until the tires cool off.
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12.
When should you turn the retarder off?
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when the cargo is prone to shifting.
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when the road is slippery.
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when the cargo is heavy.
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when your vehicle has a high center of gravity.
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13.
Which of the following vehicles is most likely to turn over?
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65 ft. conventional double
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Triple trailer
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3 axle tractor semitrailer
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5 axle tractor semitrailer
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14.
You as a driver should always:
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drive slowly in the left lane of traffic.
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stay in your lane.
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reduce your following distance.
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make emergency plans when you see a hazard.
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15.
Which of the following will NOT help you prevent rollover?
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Keeping the cargo as close to the ground as possible.
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Driving slowly around turns.
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Using the controlled braking method.
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All of the above.
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16.
When more than one semitrailer is behind the tractor:
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the more heavily loaded semitrailer should be in the rear.
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the lighter trailer should be in the rear.
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the more heavily loaded trailer should be disconnected.
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The order doesn't matter.
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17.
Your mirrors should be adjusted so that:
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the rear of the vehicle is visible in the mirror.
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more than half of the mirror shows the vehicle.
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no part of the vehicle is visible in the mirror.
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a part of the vehicle is visible in the mirror.
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18.
Before driving a vehicle with a dual brake brake system, the driver should:
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allow time for the air compressor to build up a minimum of 100 psi pressure in both the primary and secondary systems.
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wait at least 5 minutes before driving.
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pump the brake pedal 10 times to build pressure.
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wait at least 10 minutes before driving.
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19.
When should you downshift automatic transmissions?
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Watch your tachometer, and downshift when your engine reaches the top of the range.
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When going down steep grades.
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When you start to get drowsy.
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When you want to go faster.
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20.
An alcohol evaporator:
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used to reduce the chance of the front wheels skidding.
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is used to reduce the risk of ice in air brake valves and other parts during cold weather.
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to hold compressed air.
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protects the air brake system from too much pressure.
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