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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 West Virginia doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The WV CDL doubles triples test covers the following sections of the West Virginia CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this WV CDL practice test now to prepare for the actual test!
1. You should always try to back toward the driver's side because:
you can watch the rear of your vehicle out the side window.
backing toward the left side is more dangerous.
you can more easily correct any steering errors.
None of the above.
2. An alcohol evaporator:
protects the air brake system from too much pressure.
is used to reduce the risk of ice in air brake valves and other parts during cold weather.
to hold compressed air.
used to reduce the chance of the front wheels skidding.
3. Before operating the vehicle, the driver should:
review the last vehicle inspection report.
rely on the last vehicle inspection and skip the pre-trip inspection.
should not review the vehicle inspection report and immediately try to find any vehicle defects.
None of the above.
4. For safety during a trip, you should:
check critical items when you stop.
watch gauges for signs of trouble.
use your senses to check for problems.
All of the above.
5. What can cause poor traction?
Too much weight on the steering axle.
Too little weight on the driving axles.
Overloading the truck.
All of the above.
6. Older trailers do not have spring brakes. If the air supply leaks away:
the trailer will stop normally.
there will be no emergency brakes.
the ABS won't work properly.
All of the above.
7. Before connecting the converter dolly to the rear trailer, make sure that:
the kingpin rests on the fifth-wheel.
the locking jaws rest on the kingpin.
the shut-off valves at the rear of the first trailer are open.
the trailer height is slightly lower than the center of the fifth-wheel.
8. If your ABS malfunctions:
the parking brakes will not work.
the service brake will not work.
you should immediately come to a complete stop.
you still have normal brake functions.
9. What factors can cause brakes to fade?
Excessive heat and brakes out of adjustment.
Slippery surfaces and shaded areas.
Gravel and tar.
Dirt roads and in unpaved yards.
10. To reduce driver distraction, you should do all of the following except:
Adjust mirrors before driving
Eat while driving.
Plan your route before driving
Pre-program radio stations
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WV CDL Doubles Triples Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
Number of questions: 20
Correct answers to pass:16
Passing score:80%
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