DOUBLES TRIPLES TEST MI - CDL PRACTICE TEST
11.
Air tanks usually hold enough compressed air to allow the brakes to be used _________ even if the compressor stops working.
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for one day
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for one stop
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several times
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12.
You can release dolly brakes:
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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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13.
If you have to drive off the road, you should:
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keep one set of wheels on the pavement, if possible.
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brake as hard as you can to maintain control.
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fully apply the brakes until your speed has dropped to about 20 mph.
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14.
When coupling a double or triple, ________ should be attached last.
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the trailer right behind the cab.
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the middle trailer.
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None of the above.
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15.
For safety during a trip, you should:
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check critical items when you stop.
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watch gauges for signs of trouble.
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All of the above.
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16.
If you're feeling tired while driving you should:
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stop driving and get some rest.
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eat something.
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drink coffee.
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17.
Empty trucks:
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require the same stopping distance than full trucks.
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require a shorter stopping distance than full trucks.
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require a greater stopping distance than full trucks.
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18.
You should test the coupling by:
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locking the pintle hook.
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applying the parking brakes so the rig will not move.
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pulling against the pin of the second semitrailer.
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19.
Dollies with ABS are required to have a malfunction lamp:
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on the right side.
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on the rear.
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on the left side.
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20.
During a walk around inspection of a combination vehicle, drivers should check that:
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the glide plate is securely mounted to the trailer frame.
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all locking pins are present and locked in place.
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All of the above.
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