CDL COMBINATION PRACTICE TEST NEW JERSEY
11.
Combination vehicles usually:
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are easier to drive than single than single CMVs.
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are shorter than single than single CMVs.
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require more driving skill than single CMVs.
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All of the above.
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12.
Which of these statements is true?
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"Bobtail" tractors can take longer to stop than a combination vehicle loaded to maximum gross weight.
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Large combination vehicles take longer to stop when they are fully loaded than when they are empty.
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Trailer skids are more likely to happen when the trailer is empty or lightly loaded.
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All of the above.
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13.
As part of the final air brake check, you should:
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Check air compressor governor cut-in and cut-out pressure.
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Test low pressure warning signal.
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Test air leakage rate.
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All of the above.
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14.
A bridge formula permits:
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more maximum axle weight for axles that are far apart.
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less maximum axle weight for axles that are far apart.
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more maximum axle weight for axles that are closer together.
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less maximum axle weight for axles that are close together.
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15.
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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hand valve
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height control valve
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16.
The service line:
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carries air to the parking brake to control the trailer brakes.
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carries air and is connected to relay valves which allow the trailer brakes to be applied more quickly.
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carries power steering fluid to control the trailer brakes.
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None of the above.
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17.
You must check that all shut-off valves are in the open position except the ones:
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on the first trailer in a set of triples.
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on the middle trailer of a set of triples.
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on the first trailer in a set of doubles.
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at the back of the last trailer.
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18.
Emergency lines on combination vehicles are often coded with the color ____ to keep from getting them mixed up with the ____ service line.
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red; yellow
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blue; red
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red; blue
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yellow; black
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19.
After coupling the trailer, begin raising the landing gear by using:
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the low gear range.
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the high gear range.
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the electrical cord.
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the crank handle.
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20.
During a trip:
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you should not watch gauges as they can be misleading.
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you should watch gauges for signs of trouble.
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you should watch gauges to make sure that valve caps are not missing.
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None of the above.
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