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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 York doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The NY CDL doubles triples test covers the following sections of the New York CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this NY CDL practice test now to prepare for the actual test!
1.
To test your parking brake, do the following:
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Set the parking brake while going downhill.
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Set the parking brake, and gently pull against it in a low gear.
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Speed up to 5 mph, then set the parking brake.
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Speed up to 15 mph, then set the parking brake.
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2.
Which of the following is NOT correct? Anti-lock brakes:
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require drivers to apply the brakes as hard as they can without locking the wheels.
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help drivers avoid skids caused by over braking.
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give drivers more control over the vehicle during braking.
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help drivers avoid wheel lock up.
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3.
Combination vehicles usually:
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are shorter than single than single CMVs.
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require more driving skill than single CMVs.
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are easier to drive than single than single CMVs.
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All of the above.
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4.
Why should you back toward the driver's side?
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You can see better and watch the rear of your vehicle by looking out the side window.
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You can more easily correct any steering errors.
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Using double clutching requires practice.
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All of the above.
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5.
The safety valve installed in the first tank the air compressor pumps air is set to open:
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if there is too little pressure.
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if there is too much pressure.
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at 30 psi.
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every 15 minutes.
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6.
If during vehicle inspection a tire is too hot to touch, you should:
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make sure there is enough engine oil on the tires.
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let air out.
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remain stopped until the tire cools off.
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immediately decrease air pressure.
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7.
How does ABS help you?
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ABS always shortens your stopping distance.
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ABS replaces your normal brakes and helps you to stop faster.
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ABS helps you avoid wheel lock up and maintain control when you brake hard on slippery surfaces.
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ABS makes stab braking more effective.
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8.
For safe handling, the heaviest trailer should be:
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the second trailer in a triple.
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behind the tractor.
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the last trailer.
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None of the above.
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9.
The last trailer of triples is ______ as likely to turn over as a five-axle tractor.
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3.5 times
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twice
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4 times
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5 times
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10.
As you approach off ramps and on ramps, remember:
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that the posted speed limit may be safe for automobiles, but may not be safe for larger vehicles.
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that braking and turning at the same time can be a dangerous.
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to slow down before you get on the curved part of an off ramp or on ramp.
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All of the above.
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