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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 Nevada doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The NV CDL doubles triples test covers the following sections of the Nevada CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this NV CDL practice test now to prepare for the actual test! Important: Triple trailers are not legal in Nevada.
1. A bridge formula permits:
more maximum axle weight for axles that are closer together.
more maximum axle weight for axles that are far apart.
less maximum axle weight for axles that are far apart.
less maximum axle weight for axles that are close together.
2. If your ABS fails:
the first step is to get the vehicle off the road and stop.
your tires might grab unexpectedly and you could lose control.
you will have no brake function, and could lose control.
you will still have normal brake functions.
3. To prevent rollover, you should:
turn the engine off while turning.
drive on the shoulder of the road when possible.
drive in the left lane.
drive slowly around corners.
4. 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:
the rear trailer of a triple.
rearward amplification.
worn tire tread.
strong wind.
5. If an aggressive driver is involved in an accident down the road, you should:
confront the aggressive driver.
stop a safe distance from the accident scene, wait for the police and report the behavior you witnessed.
make eye contact with the driver.
try to get their vehicle to the side of the road.
6. Under a pressurized system, the radiator cap:
should never be removed until the system has cooled.
should never be hot.
should always be cool.
should be removed when the coolant is hot.
7. Why should you cover your cargo?
To protect people from spilled cargo.
Because spill protection is a safety requirement in many states.
To protect the cargo from weather.
All of the above.
8. On any upgrade, gravity:
slows you down.
doesn't affect your speed.
speed you up.
doubles your speed.
9. The trailer hand valve should:
never be used for parking.
never be used to test the trailer brakes.
be used in driving.
All of the above.
10. If driving a heavy vehicle, you should:
avoid braking.
stay in the right lane.
try to pass other vehicles going uphill.
stay in the left lane.
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NV CDL Doubles 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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