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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Wisconsin CDL combination test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The test covers the combination vehicles section of the Wisconsin CDL Manual. Take this practice test now to prepare for the actual WI CDL combination test!
1.
The tire load rating is stated:
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on each axle.
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on the dashboard.
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inside the suspension system.
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on the side of each tire.
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2.
To unlock the fifth wheel, pull the release handle to the _______ position.
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open
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sixth
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neutral
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closed
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3.
ABS will:
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not give you more control over the vehicle during braking.
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increase your average speed.
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shorten your stopping distance.
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not change your normal braking capability.
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4.
Combination vehicles have __ air lines.
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3
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4
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2
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1
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5.
Empty trucks:
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may have poor traction.
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require shorter stopping distances than fully-loaded trucks.
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have better traction than fully-loaded trucks.
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None of the above.
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6.
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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the rear trailer of a triple.
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strong wind.
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worn tire tread.
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rearward amplification.
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7.
Headlights:
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can blind other drivers.
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should be out of adjustment.
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must be turned on a half hour before sunset to a half hour after sunrise.
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should not be used when driving at night.
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8.
On front tires, tread should be at least:
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4/16 inch
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2/32 inch
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1/16 inch
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4/32 inch
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9.
You are coupling a tractor to a semi-trailer and have backed up but are not yet under the trailer. Before backing under the semi-trailer, you should hook up:
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the safety chain.
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the emergency and service air lines.
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the landing gear.
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the electrical service cable.
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10.
To stop a trailer skid, you should:
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use the trailer hand brake to straighten out the rig.
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use the brakes to slow down.
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countersteer to get traction back.
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release the brakes to get traction back.
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