UT CDL COMBINATION TEST - PRACTICE TEST
11.
Empty trucks:
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require the same stopping distance than full trucks.
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require a greater stopping distance than full trucks.
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require a shorter stopping distance than full trucks.
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None of the above.
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12.
Livestock:
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can move around in a trailer and cause unsafe handling.
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should never be carried on a trailer.
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should never be kept bunched together.
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should always be placed in the rear of the trailer.
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13.
In vehicles with air brakes, the tractor protection valve:
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keeps air in the tractor or truck brake system.
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is used to connect the service and emergency air lines from the truck/tractor to the trailer.
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carries air, which is controlled by the trailer hand brake or the foot brake.
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provides the air pressure used to operate trailer brakes.
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14.
You are hooking up to an old trailer. The trailer does not have spring brakes. If you cross the air lines:
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you will be able to drive away but you will not have trailer brakes.
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the trailer hand valve will apply the tractor brakes instead of the trailer brakes.
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the glad hands will be locked together.
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None of the above.
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15.
An Anti-lock Braking System:
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increases a vehicle's stopping power.
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lets you brake faster.
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keeps your wheels from locking when you brake hard.
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increases the distamce required to stop on slippery surfaces.
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16.
Which of these is more likely to rollover due to the "crack-the-whip" effect?
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The last trailer of doubles
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The front trailer of 65 ft. conventional doubles
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5-axle tractor semitrailers
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The last trailer of triples
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17.
If you will be transporting hazardous materials that require placards, you must:
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obtain a special transit permit.
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obtain a hazardous materials endorsement.
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transport the materials at night only.
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ask permission of the local transportation agency.
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18.
You are coupling a tractor to a semi-trailer. After checking the trailer height but before supplying air to the trailer, you should:
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connect the air lines to the trailer.
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raise the front trailer supports.
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inspect the fifth-wheel.
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lock the trailer brakes.
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19.
Where are shut-off valves?
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At the front of each trailer.
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At the front and back of each trailer.
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On converter dollies.
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At the back of each trailer.
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20.
_________ rigs are much more likely to roll over in an accident than _________ rigs.
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Empty ; overloaded
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Fully loaded ; empty
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Empty ; fully loaded
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Fully loaded ; overloaded
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