IL CDL DOUBLES TRIPLES TEST - PRACTICE TEST
11.
What is true about tire chains?
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You must carry the at least 6 chains and extra cross-links.
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You should watch the official video tutorial by the manifacturer before putting them on.
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You should learn how to put the chains on before you need to do it in snow.
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All of the above.
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12.
In vehicles with air brakes, the air compressor governor:
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controls how much air the air compressor will pump into the air storage tanks.
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controls when the air compressor will pump air into the air storage tanks.
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controls when the air storage tanks will pump air into the air compressor.
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None of the above.
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13.
When the wheels of a trailer lock up, which of the following is most likely to occur?
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The rig will stay in a straight line but slide sideways.
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The trailer will tend to swing around (trailer jackknife).
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The trailer will the trailer
has overturn.
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The trailer will tend to push the towing vehicle sideways (tractor jackknife).
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14.
When backing, you should:
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back and turn toward the right side whenever possible.
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back quickly.
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only use mirror on the driver's side.
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use the mirrors on both sides.
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15.
Which of the following statements about doubles/triples is true?
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Doubles/triples are more stable than other CMVs.
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Doubles/triples may have to go faster around corners than single trailer combination vehicles.
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A safe speed on a curve for a single trailer combination vehicle may be too fast for a double/triple.
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All of the above.
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16.
As you approach off ramps and on ramps, remember:
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to slow down before you get on the curved part of an off ramp or on ramp.
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that the posted speed limit may be safe for automobiles, but may not be safe for larger vehicles.
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that braking and turning at the same time can be a dangerous.
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All of the above.
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17.
If you doubt you have enough space to pass under a bridge, you should:
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drive faster.
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turn on your 4-way emergency flashers.
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go slowly.
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turn on your headlights.
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18.
When driving double and triple trailers, drivers should:
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steer gently and go slowly around corners.
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look far ahead.
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allow more following distance.
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All of the above.
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19.
The maximum amount of play in a 20-inch steering wheel is:
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5 inches
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2 inches
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1/2 inch
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1/4 inch
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20.
Doubles and triples:
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can be turned suddently due to the low center of gravity.
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have a lower chance of skidding.
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can be stopped suddenly due to their weight.
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can't be turned suddenly.
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