CDL DOUBLES TRIPLES PRACTICE TEST MISSISSIPPI
11.
With an engine fire, you should NOT:
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open the hood.
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turn the engine off as soon as possible.
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shoot foam from the vehicle’s underside.
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None of the above.
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12.
While crossing railroad tracks, you should:
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shift up.
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stop, then look and listen for the train.
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not shift gears.
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shift down.
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13.
During a walk around inspection of a double or triple trailer, make sure that the converter dolly air tank drain valve is _____ and the glad hands are ______.
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closed; properly connected
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closed; not connected
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open; properly connected
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open; not connected
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14.
When the wheels of a trailer lock up, which of the following is most likely to occur?
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The trailer will tend to swing around (trailer jackknife).
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The trailer will tend to push the towing vehicle sideways (tractor jackknife).
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The trailer will the trailer
has overturn.
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The rig will stay in a straight line but slide sideways.
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15.
When coupling twin trailers, the more heavily loaded semitrailer should:
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be in first position behind the tractor.
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have its brakes locked.
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be in the rear.
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have chocked wheels.
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16.
Rollovers happen when drivers:
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turn too fast.
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turn too slowly.
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stop too often.
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brake too hard.
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17.
You should do an after-trip inspection:
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after each trip.
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at least once a week.
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after each stop.
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once a month.
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18.
Another name for front-end header boards is:
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head belt.
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cargo stopper.
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containerized racks.
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headache racks.
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19.
You are driving a vehicle with air brakes when the low air pressure warning light and buzzer come on. You should:
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slow down and test your brakes.
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activate your hazard lights and drive to the nearest place where you can stop.
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apply the brakes as hard as you can.
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pull off the road and stop immediately.
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20.
If the drive wheels start to skid:
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push in the clutch to let them turn freely.
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accelerate slightly to regain control.
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use the brakes to slow down.
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All of the above.
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