DOUBLES TRIPLES TEST NM - CDL PRACTICE TEST
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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 Mexico doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The NM CDL doubles triples test covers the following sections of the New Mexico CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this NM CDL practice test now to prepare for the actual test!
1.
The ABS malfunction lamp on the instrument panel is:
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Red
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Yellow
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Orange
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2.
To know how much space you should keep in front of you when driving at speeds below 40 mph, one good rule says you need at least ______ for each ______ of vehicle length.
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1 second; 10 feet
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1 second; 5 feet
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2 seconds; 10 feet
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3.
When coupling double trailers, you can secure the second trailer by:
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using the trailer spring brakes.
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chocking the wheels.
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All of the above.
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4.
When coupling double trailers, if the second trailer does not have spring brakes, to set the trailer emergency brakes you should:
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1. Disconnect the emergency line 2. Drive the tractor close to the trailer 3. Charge the trailer air tank 4. Connect the emergency line.
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1. Connect the emergency line 2. Drive the tractor close to the trailer 3. Disconnect the emergency line 4. Charge the trailer air tank.
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1. Drive the tractor close to the trailer 2. Connect the emergency line 3. Charge the trailer air tank 4. Disconnect the emergency line.
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5.
The best way to recognize that your trailer has started to skid is:
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by recognizing tire failure.
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by seeing it in your mirrors.
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by feeling the brakes come on.
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6.
Empty trucks require _____ stopping distances because empty vehicles have ______ traction.
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greater; more
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less; more
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greater; less
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7.
When parking a trailer without spring brakes, it is very important for safety that you use wheel chocks. Why?
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The air could leak out of the trailer air tank, releasing its emergency brakes.
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You may not notice a major leak in the service line until you try to put the brakes on.
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if you don't use wheel chocks, supply air will be sent to the service line instead of going to charge the trailer air tanks.
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8.
Over-length loads:
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require special transit permits.
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may require special equipment such as "wide load" or flags.
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All of the above.
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9.
Warnings on low bridges or underpasses:
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are always posted.
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are often posted, but sometimes they are not.
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must be posted.
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10.
Which of the following is a good way to avoid becoming an aggressive driver?
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Keep your following distance reasonable.
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Be realistic about your travel time.
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All of the above.
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