KANSAS DOUBLES TRIPLES PRACTICE CDL TEST
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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 Kansas doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The KS CDL doubles triples test covers the following sections of the Kansas CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this KS CDL practice test now to prepare for the actual test! Important: Triple trailers are not legal in Kansas.
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1.
Which of the following is NOT true?
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ABS only comes into play when a wheel would have locked up because of over braking.
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ABS will change the way you normally brake.
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ABS won't compensate for bad brakes.
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ABS won't compensate for poor brake maintenance.
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2.
If your vehicle has air brakes, to check that air flows to all trailers:
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pull gently on the trailer with the tractor.
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check that the fifth wheel is not so far forward that the tractor frame will hit the landing gear.
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go to the rear of the second trailer and open the emergency line shut-off.
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watch each trailer’s air gauge for a drop of 25 psi.
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3.
If you go twice as fast, your stopping distance will increase by:
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eight times.
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ten times.
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two times.
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four times.
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4.
Which of the following statements about backing heavy vehicles is true?
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You should avoid backing whenever you can.
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Always back as quickly as possible.
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The helper should stand where you cannot see the helper.
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Back to the right side so that you can see better.
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5.
To prevent a rollover, the driver should:
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drive slowly around corners, on ramps, and off ramps.
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drive on the shoulder if possible.
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make quick lane changes if possible.
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pay extra attention to the coolant level.
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6.
If you are being tailgated, you should:
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make quick changes.
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open up room in front of you.
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increase your speed very gradually.
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turn on your taillights.
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7.
When the wheels of a trailer lock up:
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the vehicle will gradually come to a complete stop.
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the trailer will tend to swing around.
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ABS will increase stopping power.
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All of the above.
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8.
You should always try to back toward the driver's side because:
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you can watch the rear of your vehicle out the side window.
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backing toward the left side is more dangerous.
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you can more easily correct any steering errors.
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None of the above.
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9.
Before driving a vehicle with a dual air system, allow time for the air compressor to build up a minimum of ____ pressure in both the primary and secondary systems.
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75 psi
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50 psi
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100 psi
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25 psi
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10.
Before driving a vehicle with a dual brake brake system, the driver should:
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wait at least 10 minutes before driving.
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allow time for the air compressor to build up a minimum of 100 psi pressure in both the primary and secondary systems.
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pump the brake pedal 10 times to build pressure.
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wait at least 5 minutes before driving.
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KS Doubles Triples CDL Test
| Number of questions: | 20 |
| Correct answers to pass: | 16 |
| Passing score: | 80% |
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