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Safely pulling double and triple trailers requires knowledge and skill. If you want to pull double or triple trailers, you must add the Doubles/Triples (T) endorsement to your Class A CDL. The Wisconsin doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The WI CDL doubles triples test covers the following sections of the Wisconsin CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this WI CDL practice test now to prepare for the actual test!
1.
To prevent a rollover, the driver should:
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drive on the shoulder if possible.
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make quick lane changes if possible.
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drive slowly around corners, on ramps, and off ramps.
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pay extra attention to the coolant level.
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2.
If an aggressive driver is involved in an accident down the road, you should:
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confront the aggressive driver.
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stop a safe distance from the accident scene, wait for the police and report the behavior you witnessed.
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make eye contact with the driver.
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try to get their vehicle to the side of the road.
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3.
When driving a double or triple:
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the more heavily loaded trailer should be directly behind the tractor.
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all trailers should have the same weight.
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the more heavily loaded trailer should be in the rear.
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the lighter trailer should be directly behind the tractor.
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4.
You must have at least _____ inch tread depth in every major groove on front tires.
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3/32
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4/32
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2/32
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6/32
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5.
To make the brakes work, air brakes use:
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hydraulic air.
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compressed air.
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nitrogen.
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carbon monoxide.
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6.
To avoid becoming an aggressive driver you should:
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speed up if you think you’re going to be late.
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give other drivers your full attention.
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give other drivers the benefit of the doubt.
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make gestures to other drivers.
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7.
If your vehicle is equipped with air brakes, loss of air pressure in the emergency line will cause:
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the vehicle to slide back and forth.
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the springs to put on the brakes.
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the trailer emergency brakes to come on.
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the trailer supply valve to open.
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8.
Which of the following is not a braking system on a truck?
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Emergency brake
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Steering brake
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Parking brake
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Service brake
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9.
Longer combination vehicles have the tendency to swing wide on turns. This is called:
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off-tracking.
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jackknifing.
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hydroplaning.
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rollover.
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10.
When driving a 60-foot truck at 50 mph, your minimum following distance should be:
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7 seconds
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3 seconds
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5 seconds
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6 seconds
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