COLORADO CDL COMBINATION PRACTICE TEST
11.
If ABS is not working:
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you should use the parking brake.
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you should use the emergency brake.
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you will still have brakes.
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you will not have any brakes.
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12.
Why should you cover your cargo?
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To protect people from spilled cargo.
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Because spill protection is a safety requirement in many states.
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To protect the cargo from weather.
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All of the above.
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13.
Whenever you back up with a trailer, position your vehicle so you can back in a straight line. If you must back on a curved path, back toward:
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the right side.
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Neither side (do not back).
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Either side.
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the driver's side.
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14.
Before entering a curve, you should:
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reduce your speed.
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maintain your speed.
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come to a complete stop.
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increase your speed.
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15.
When you make a quick lane change, the crack-the-whip effect can turn the trailer over. The crack-the-whip effect is caused by:
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strong wind.
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worn tire tread.
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the rear trailer of a triple.
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rearward amplification.
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16.
On front tires, tread should be at least:
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4/32 inch
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2/32 inch
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4/16 inch
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1/16 inch
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17.
What is the minimum tread depth for tires other than front tires?
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2/32 inch
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4/32 inch
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8/32 inch
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4/16 inch
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18.
When inspecting the coupling, check that the safety latch is:
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pushing against the kingpin.
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in position over the locking lever.
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in the "lock" position.
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None of the above.
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19.
You should test the coupling by:
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locking the pintle hook.
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disconnect the safety chains.
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pulling against the pin of the second semitrailer.
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applying the parking brakes so the rig will not move.
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20.
If driving a heavy vehicle, you should:
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stay in the right lane.
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avoid braking.
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try to pass other vehicles going uphill.
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stay in the left lane.
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