CDL COMBINATION PRACTICE TEST (NV)
11.
Converter dollies and trailers built before 1975:
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are required to have ABS.
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typically have 2 parking brakes.
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are required to have spring brakes.
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are not required to have spring brakes.
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12.
When more cargo is piled up in a truck, the truck becomes easier to turn over. Fully loaded rigs are _________ to roll over in a crash than empty rigs.
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ten times more likely
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three times more likely
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less likely
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five times more likely
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13.
If you feel drowsy while driving, what should you do?
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Eat heavy foods.
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Turn on the radio to keep you awake.
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Pull off the road and get some sleep.
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Get an energy drink.
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14.
Cargo tie-downs are used to:
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prevent freezing.
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keep cargo from shifting or falling.
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prevent right-turn accidents.
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prevent skidding.
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15.
In your mirror, you see a car approaching from the rear. The next time you check your mirror, you don't see the car. If you wish to change lanes, you should:
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ease into the other lane slowly so the other car can get out of the way.
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assume the car left the roadway and change lanes as normal.
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wait until you are sure the car isn't in your blind spot.
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None of the above.
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16.
You are driving a modern truck with a manual transmission. When going down a hill you should usually:
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shift into neutral and coast.
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use the same gear you would use to go up the hill.
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downshift after your
speed has already built up.
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use a lower gear than would be required to go up the hill.
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17.
What factors can cause brakes to fail or fade?
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Brakes out of adjustment
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Not relying on the engine braking effect
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Excessive use of the service brakes
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All of the above.
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18.
When the ______ closes, it stops any air from going out of the tractor.
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tractor protection valve
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alcohol evaporator
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height control valve
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hand valve
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19.
The crack-the-whip effect:
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the ends of some vehicles to drag.
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can turn the trailer over.
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can cause problems for drivers coming toward you.
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can cause a vehicle to tilt.
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20.
To prevent rollover, you should:
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drive slowly around on ramps and off ramps.
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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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All of the above.
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