CDL DOUBLES PRACTICE TEST NEVADA
11.
When should you turn the retarder off?
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when the road is slippery.
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when your vehicle has a high center of gravity.
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when the cargo is heavy.
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when the cargo is prone to shifting.
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12.
ABS:
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helps you avoid skids caused by over braking.
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may cause your wheels to lock when you break hard.
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helps you stop faster.
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improves your visibility at night.
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13.
You are driving a double. Before entering traffic, you should:
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turn on your headlights.
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always come to a complete stop.
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make sure you have a large enough gap before entering or crossing traffic.
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assume there is enough room to merge into traffic.
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14.
The trailer hand valve should be used:
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to test the trailer brakes.
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to check that the fire extinguisher is charged.
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to check that the trailer emergency brakes are on.
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to check that the trailer is locked onto the tractor.
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15.
You should always adjust your speed to be able to stop within:
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50 feet.
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the length of your vehicle.
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30 feet.
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the distance you can see ahead.
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16.
With the controlled braking method:
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you use the parking brake to lock the wheels.
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you lightly tap the brakes.
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you apply your brakes all the way and release the brakes when the wheels lock up.
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you apply your brakes as hard as possible without locking the wheels.
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17.
Air tank drains:
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protect the tanks and the rest of the system from too much pressure.
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are used to remove water and oil from the air tanks.
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are used to move air to the brakes.
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should not be used in wet weather.
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18.
To prevent rollover, you should:
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keep the cargo as close to the ground as possible.
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go slowly around turns.
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drive slowly around on ramps and off ramps.
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All of the above.
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19.
Fully loaded rigs:
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are less likely to roll over than empty rigs.
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are much more likely to roll over than empty rigs.
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are just as likely to roll over as empty rigs.
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None of the above.
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20.
When driving, you should check mirrors regularly to know where other vehicles are around you. Remember that:
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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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every registered motor vehicle must have at least one mirror.
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convex mirrors make things look larger and closer than they really are.
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