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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.
Longer combination vehicles have the tendency to swing wide on turns. This is called:
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hydroplaning.
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off-tracking.
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rollover.
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jackknifing.
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2.
Tests have shown that trucks with a high center of gravity are more likely to tip over, therefore you should:
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distribute the cargo so the majority of the weight is on the steering axle.
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put the lightest parts of the cargo under the heaviest parts.
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distribute the cargo as low as possible.
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All of the above.
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3.
When you turn suddenly while pulling doubles, which trailer is most likely to turn over?
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The rear trailer is twice as likely to turn over as the tractor.
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All trailers are equally likely to turn over.
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The front trailer is twice as likely to turn over as the tractor.
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None of the above.
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4.
What is the proper following distance for a 40 foot truck traveling at 35 mph?
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10 seconds
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5 seconds
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12 seconds
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4 seconds
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5.
By pushing the trailer air supply control knob in, you:
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supply the tires with air.
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supply the trailer with air.
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keeps air in the tractor or truck brake system.
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shut the air off and put on the trailer emergency brakes.
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6.
The heavier the vehicle:
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the more work the brakes must do to stop it.
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the less work the brakes must do to stop it.
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the higher the center of gravity will be.
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None of the above.
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7.
When driving on slippery surfaces, you should:
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not pass slower vehicles unless necessary.
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make turns as quickly as possible.
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change lanes often.
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All of the above.
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8.
Most hydraulic brake failures occur for one of two reasons, one of which is:
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loss of hydraulic pressure.
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excessive downshifting.
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relying too much on the engine braking effect.
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driving in cold weather.
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9.
When driving a combination vehicle, which of the following 2 things will help you prevent a rollover?
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Keeping cargo near the center of the vehicle and driving slowly on turns.
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Keeping the cargo near the ground and driving slowly around turns.
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Keeping cargo near the center of the vehicle and driving slowly on the highway.
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Keeping cargo near the ground and driving slowly on the highway.
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10.
The only way to stop a front-wheel skid is to:
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supply more power to the drive wheels.
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countersteer.
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let the vehicle slow down.
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All of the above.
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