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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Indiana 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 Indiana CDL Manual. Take this practice test now to prepare for the actual IN CDL combination test!
1. On any upgrade, gravity:
slows you down.
speed you up.
doesn't affect your speed.
doubles your speed.
2. Cargo should be properly covered:
to block your view or someone else’s.
to protect the weather from the cargo.
to protect people from spilled cargo.
All of the above.
3. Which of the following is NOT part of checking the sliding fifth-wheel?
Testing the tractor protection valve
Checking that it is properly greased
Checking that the slide is not damaged or parts are missing
Checking that all locking pins are present and locked in place
4. What is the proper following distance for a 40 foot truck traveling at 35 mph?
12 seconds
4 seconds
10 seconds
5 seconds
5. When the wheels of a trailer lock up, the trailer will tend to swing around. This is more likely to happen when:
the trailer is overloaded.
the trailer is fully loaded.
the trailer is empty or lightly loaded.
None of the above.
6. A trailer jackknife is more likely to happen when the trailer is:
loaded to its full capacity.
None of the above.
7. Dual tires:
should always come in contact with each other.
are dangerous.
should not come in contact with each other.
should come in contact with each other whenever possible.
8. 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.
9. If the drive wheels begin to spin when accelerating, you should:
continue to accelerate.
set the parking brake.
take your foot off the accelerator.
brake gently.
10. Hydroplaning:
only occurs at extremely high speeds.
only happens when tire pressure is higher than normal.
can occur at speeds as low as 30 mph.
never occurs at speeds below 40 mph.
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IN Combination Test

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