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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 Ohio doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The OH CDL doubles triples test covers the following sections of the Ohio CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this OH CDL practice test now to prepare for the actual test! Important: Triple trailers are not legal in Ohio.
1.
ABS helps you:
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drive faster.
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brake harder.
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None of the above.
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2.
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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3.
If you are carrying a heavy load that is slowing you down, you should:
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drive on the shoulder.
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drive in the left lane.
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drive in the right lane.
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4.
Engine oil pressure should come up to normal within _________ after the engine is started.
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two minutes
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seconds
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five minutes
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5.
As you approach off ramps and on ramps, remember:
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to always brake and turn at the same time.
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that the posted speed limit may not be safe for larger vehicles.
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that downgrades make it easier to reduce speed.
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6.
The posted speed limit for a curve:
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may be too fast for many trucks or buses.
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is safe for all vehicles.
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is safe for trucks or buses, but it may be too fast for cars.
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7.
In your mirror, you see a car approaching from the rear. The next time you check your mirror, you don't see the car. If you wish to change lanes, you should:
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assume the car left the roadway and change lanes as normal.
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ease into the other lane slowly so the other car can get out of the way.
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wait until you are sure the car isn't in your blind spot.
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8.
Who is responsible for inspecting the cargo?
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The person who loaded and secured the cargo
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The driver
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The shipper
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9.
Dollies with ABS are required to have a malfunction lamp:
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on the left side.
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on the rear.
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on the right side.
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10.
When should you be particularly careful about high winds?
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When going downhill
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When emerging from a tunnel
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When driving at night
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