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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 a tire fails while you are driving, you should:
call your supervisor for instructions.
stay off the brake until your vehicle has slowed down.
stop on the roadway if possible.
brake as hard as possible.
2. When driving a 60-foot truck at 50 mph, your minimum following distance should be:
5 seconds
6 seconds
7 seconds
3 seconds
3. In vehicles with air brakes, the two markings on a front brake limiting valve are:
wet and dry.
high and low.
normal and slippery.
left and right.
4. When backing, it is best to:
use a helper whenever possible.
try to back in the direction of the drift.
back toward the passenger's side when possible.
use only the passenger's side mirror.
5. At dawn, dusk, in rain or snow, to make yourself easier to see you should:
use the emergency flashers.
use the high beams.
use the low beams.
use the parking lights.
6. To make the brakes work, air brakes use:
hydraulic air.
compressed air.
carbon monoxide.
7. You should test the coupling by:
locking the pintle hook.
pulling against the pin of the second semitrailer.
applying the parking brakes so the rig will not move.
disconnect the safety chains.
8. If you hear a loud loud "bang" and the steering feels "heavy", you should:
check your rearview mirrors to see if you have a flat tire.
brake hard and pull off the road.
pump the brakes until the vehicle has slowed down.
hold the steering wheel firmly and stay off the brake.
9. When should you downshift automatic transmissions?
Watch your tachometer, and downshift when your engine reaches the top of the range.
When you want to go faster.
When going down steep grades.
When you start to get drowsy.
10. If your trucks has a high center of gravity, which of the following is true for curves?
Reduce your speed to a crawl.
You should travel at the posted speed limit.
You should slow down, as your truck can roll over at the posted speed limit for the curve.
None of the above.
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NV 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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