CDL DOUBLES TRIPLES PRACTICE TEST WISCONSIN
11.
The posted speed for a curve that may be safe for a straight truck:
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is likely to be safe for a double or triple.
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is never safe for a double or triple.
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could be too fast for a double or triple.
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can be ignored when driving a double or triple.
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12.
If your brakes fail on a steep mountain downgrade, you should:
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decide what to do as soon as you know your brakes do not work.
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set the parking brake and park in an open area.
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stay on the road and keep looking for the next available escape ramp.
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slow down until your vehicle comes to a complete stop.
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13.
When connecting to the rear trailer, the trailer height should be:
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higher than the center of the fifth-wheel.
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the same height as the fifth-wheel.
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lower than the center of the fifth-wheel.
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None of the above.
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14.
If your vehicle has air brakes, to check that air flows to all trailers:
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pull gently on the trailer with the tractor.
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check that the fifth wheel is not so far forward that the tractor frame will hit the landing gear.
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watch each trailer’s air gauge for a drop of 25 psi.
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go to the rear of the second trailer and open the emergency line shut-off.
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15.
When should you downshift automatic transmissions?
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Watch your tachometer, and downshift when your engine reaches the top of the range.
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When going down steep grades.
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When you start to get drowsy.
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When you want to go faster.
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16.
Before connecting the converter dolly to the rear trailer, make sure that:
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the kingpin rests on the fifth-wheel.
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the trailer height is slightly lower than the center of the fifth-wheel.
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the locking jaws rest on the kingpin.
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the shut-off valves at the rear of the first trailer are open.
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17.
With an engine fire, you should:
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turn the engine off as soon as possible.
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not shoot foam from the vehicle’s underside.
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open the hood as soon as possible.
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All of the above.
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18.
Pre-trip inspections of doubles and triples should:
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be done by the shipper.
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take less time than inspecting straight trucks.
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take more time than inspecting straight trucks.
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be done once a week.
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19.
Too little weight on the driving axles can cause:
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mechanical damage.
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poor traction.
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poor visibility.
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longer stopping distances.
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20.
If you cannot make a right turn without entering another traffic lane, you should:
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watch out for vehicles coming toward you and back up for them.
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swing wide to the left before starting the turn.
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turn wide before you start the turn.
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turn wide as you complete the turn.
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