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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 New Jersey doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The NJ CDL doubles triples test covers the following sections of the New Jersey CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this NJ CDL practice test now to prepare for the actual test!
1. How should you brake if your vehicle loses ABS?
Brake as you always have.
Stay off the Brake
Step on and off the brake pedal several times
Pump the brake repeatedly
2. If your ABS malfunctions:
the parking brakes will not work.
you still have normal brake functions.
you should immediately come to a complete stop.
the service brake will not work.
3. If you must stop on a one-way or divided highway, you should place warning devices _______ toward the approaching traffic.
10, 100 and 200 feet
5, 50 and 500 feet
3, 15 and 45 feet
5, 25 and 50 feet
4. Many large vehicles have convex (curved, "spot, "fisheye") mirrors. Convex mirrors:
are illegal in most states.
make things look smaller and farther away than they really are.
misrepresent reality by showing a larger area than flat mirrors.
None of the above.
5. Exhaust system parts should NOT:
rub against tires.
be loose.
rub against fuel system parts.
All of the above.
6. Air pressure should build up in a single air system, within about:
10 minutes.
1 minute.
15 minutes.
3 minutes.
7. Watch out for black ice:
any time the temperature is below freezing and the road looks wet.
right after it starts to rain.
when the temperature is above freezing and the road is dry.
when it is snowing.
8. Before operating the vehicle, the driver should:
review the last vehicle inspection report.
should not review the vehicle inspection report and immediately try to find any vehicle defects.
rely on the last vehicle inspection and skip the pre-trip inspection.
None of the above.
9. When driving a 50-foot truck at 40 mph, your minimum following distance should be:
5 seconds
4 seconds
6 seconds
8 seconds
10. The tire load for each tire is stated:
on the inside of the tire.
on the side of the tire.
on the tread of the tire.
on the vehicle's operator manual.
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NJ CDL Doubles Triples Test

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