ND CDL DOUBLES TRIPLES TEST - 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 North Dakota doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The ND CDL doubles triples test covers the following sections of the North Dakota CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this ND CDL practice test now to prepare for the actual test! Important: Triple trailers are not legal in North Dakota.
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1.
Enough tread is especially important in winter conditions. You need at least ________ tread depth on steering axle tires.
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4/32 inch
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8/32 inch
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6/24 inch
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2/8 inch
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2.
If you hear a loud loud "bang" and the steering feels "heavy", you should:
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hold the steering wheel firmly and stay off the brake.
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brake hard and pull off the road.
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pump the brakes until the vehicle has slowed down.
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check your rearview mirrors to see if you have a flat tire.
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3.
If you are being tailgated, you should:
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open up room in front of you.
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increase your speed very gradually.
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turn on your taillights.
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make quick changes.
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4.
To start moving without rolling back, you should:
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put on the parking brake whenever necessary.
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apply the trailer brake hand valve.
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partly engage the clutch before you take your right foot off the brake.
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All of the above.
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5.
You are driving a modern truck with a manual transmission. When going down a hill you should usually:
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shift into neutral and coast.
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use the same gear you would use to go up the hill.
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use a lower gear than would be required to go up the hill.
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downshift after your
speed has already built up.
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6.
You should flash your brake lights to warn drivers behind you when:
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you see a hazard that will require slowing down.
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you see a bus stops in the roadway ahead to unload passengers.
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you see you'll need to slow down.
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All of the above.
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7.
Air tanks usually hold enough compressed air to allow the brakes to be used _________ even if the compressor stops working.
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several times
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for one stop
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for 3 days
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for one day
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8.
Many large vehicles have convex (curved, "spot, "fisheye") mirrors. Convex mirrors:
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are illegal in most states.
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make things look smaller and farther away than they really are.
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misrepresent reality by showing a larger area than flat mirrors.
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None of the above.
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9.
Retarders:
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reduce the danger of slipping.
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reduce braking distance.
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help slow a vehicle, reducing the need for using brakes.
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improve gas mileage.
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10.
When inspecting the coupling, make sure the fifth-wheel jaws have closed around the:
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shank of the kingpin.
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the brake camshaft.
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the electrical cord.
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head of the kingpin.
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ND Doubles Triples Test
| Number of questions: | 20 |
| Correct answers to pass: | 16 |
| Passing score: | 80% |
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