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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Montana CDL combination test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The test covers the combination vehicles section of the Montana CDL Manual. Take this practice test now to prepare for the actual MT CDL combination test!
1. Never drive with landing gear only part way up. Why?
It must be exactly 5 feet off the ground.
It makes it harder to brake.
It may be harder to use.
It may catch on railroad tracks.
2. Tests have shown that trucks with a high center of gravity are more likely to tip over, therefore you should:
put the lightest parts of the cargo under the heaviest parts.
distribute the cargo as low as possible.
distribute the cargo so the majority of the weight is on the steering axle.
All of the above.
3. Radial and bias-ply tires:
should be used together.
should be used together only during bad weather.
should be used together only when driving in packed snow.
should not be used together.
4. Before leaving your vehicle unattended, you should:
Chock the wheels.
Remove the keys.
Apply the parking brake.
All of the above.
5. You are coupling a tractor to a semi-trailer and have backed up but are not yet under the trailer. Before backing under the semi-trailer, you should hook up:
the electrical service cable.
the landing gear.
the emergency and service air lines.
the safety chain.
6. As you approach off ramps and on ramps, remember:
to maintain your highway speed.
that the posted speed limit may not be safe for larger vehicles.
that downgrades make it easier to reduce speed.
to always brake and turn at the same time.
7. When uncoupling a trailer, after shutting off the trailer air supply to lock the trailer brakes, you should:
inspect the trailer supports.
back up gently to ease the pressure on the fifth-wheel locking jaws.
pull the tractor forward until the fifth-wheel comes out from under the trailer.
immediately apply your tractor parking brakes.
8. If the spring brakes do not release when you push the trailer air supply control, you should:
rev or lug the engine.
pump the brakes.
check the electrical cables.
check the air line connections.
9. How can you tell if a converter dollie has ABS?
There is a yellow lamp on the left side of the dolly.
There is a red lamp on the left side of the dolly.
There is an ABS system on the right side of the dolly.
There is an ABS plaque on the right side of the dolly.
10. You supply air to the trailer brake system by:
connecting the tractor service air line to the trailer service glad hand.
pulling out the trailer air supply valve.
plugging the electrical cord into the trailer.
pushing in the trailer air supply knob.
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MT CDL Combination Test

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