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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. If your vehicle is hydroplaning, you should:
put the vehicle in reverse.
speed up.
apply the brakes.
stay off the brake.
2. When a combination vehicle goes around a corner:
the front and rear wheels follow a different path.
the driver must keep the rear of your vehicle far away from the curb.
the rear wheels of the trailer will never off-track.
All of the above.
3. When coupling twin trailers, the more heavily loaded semitrailer should:
have its brakes locked.
be in first position behind the tractor.
be in the rear.
have chocked wheels.
4. Drivers transporting cargo are responsible for:
recognizing overloads.
inspecting the cargo.
making sure the cargo is properly secured.
All of the above.
5. 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.
75 psi
25 psi
50 psi
100 psi
6. If a trailer does not have spring brakes, to keep the trailer from moving you should:
use the service brakes.
close the brake valve.
use wheel chocks.
park on a slight decline.
7. Emergency lines are often coded with the color ___ to keep from getting them mixed up with the service line.
8. When more than one semitrailer is behind the tractor:
the more heavily loaded semitrailer should be in the rear.
the lighter trailer should be in the rear.
the more heavily loaded trailer should be disconnected.
The order doesn't matter.
9. When backing, you should:
use a helper if possible.
back and turn toward the right side.
back quickly.
avoid using the mirrors.
10. You can determine if your vehicle is equipped with ABS (anti-lock braking system) by:
checking for a yellow ABS malfunction lamp on the instrument panel.
checking if your vehicle was manufactured after March 1, 1998.
looking for wheel speed sensor wires coming from the rear of your brakes.
All of the above.
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Doubles Triples NV CDL 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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