TN CDL DOUBLES TRIPLES TEST - PRACTICE TEST
11.
You can release dolly brakes:
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by closing the air tank petcock.
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by opening the service line valve.
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by closing the emergency line valve.
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by opening the air tank petcock.
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12.
Before operating the vehicle, the driver should:
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should not review the vehicle inspection report and immediately try to find any vehicle defects.
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review the last vehicle inspection report.
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rely on the last vehicle inspection and skip the pre-trip inspection.
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None of the above.
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13.
Which of the following statements is true?
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Poor cargo ventilation is a common cause of fire.
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Carrying a properly charged and rated fire extinguisher will help prevent fires.
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There is no way that short circuits due to damaged insulation can cause a vehicle fire.
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Under-inflated tires will NOT cause a vehicle fire.
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14.
When coupling a double or triple, ________ should be attached last.
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the middle trailer.
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the more heavily loaded trailer.
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the trailer right behind the cab.
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None of the above.
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15.
The weight of a truck:
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has no effect on stopping distance.
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has an impact on stopping distance.
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is not as important as the vehicle's center of gravity in determining stopping distance.
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None of the above.
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16.
To reduce the chance of rollover, you should:
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place the cargo as high as possible inside the trailer.
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distributed the cargo as low as possible inside the trailer.
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put the lightest parts of the cargo under the heaviest parts.
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None of the above.
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17.
Which of these is more likely to rollover due to the "crack-the-whip" effect?
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The front trailer of 65 ft. conventional doubles
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The last trailer of triples
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5-axle tractor semitrailers
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The last trailer of doubles
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18.
When you see you will need to slow down, you can warn drivers behind you by:
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making gestures.
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tapping the brakes a few times.
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slamming on the brakes.
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turning on the right turn signal.
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19.
Dollies with ABS are required to have a malfunction lamp:
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on the front.
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on the rear.
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on the right side.
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on the left side.
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20.
The trailer hand valve should be used:
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to test the trailer brakes.
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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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to check that the fire extinguisher is charged.
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