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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Michigan 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 Michigan CDL Manual. Take this practice test now to prepare for the actual MI CDL combination test!
1. When you make a quick lane change, the crack-the-whip effect can turn the trailer over. The crack-the-whip effect is caused by:
strong wind.
rearward amplification.
the rear trailer of a triple.
2. What is the proper following distance for a 40 foot truck traveling at 35 mph?
10 seconds
4 seconds
12 seconds
3. What factors can cause brakes to fail or fade?
Brakes out of adjustment
Excessive use of the service brakes
All of the above.
4. When you are uncoupling a loaded trailer, lower the landing gear until:
it makes firm contact with the ground.
the tractor frame is under the trailer.
makes contact with the ground, and leave the trailer off the fifth wheel.
5. An item that is 15 feet long placed on a flatbed trailer should have at least:
1 tie-down.
2 tie-downs.
3 tie-downs.
6. When you are driving on a slippery road, you should NOT:
adjust turning and braking to road conditions.
use the engine brake or speed retarder.
keep a longer following distance.
7. An Anti-lock Braking System:
increases the distamce required to stop on slippery surfaces.
keeps your wheels from locking when you brake hard.
increases a vehicle's stopping power.
8. On any upgrade, gravity:
speed you up.
slows you down.
doubles your speed.
9. A high center of gravity means:
you'll have better traction.
you are more likely to tip over.
a rollover is less likely.
10. If you cannot make a right turn without entering another traffic lane, you should:
turn wide before you start the turn.
turn wide as you complete the turn.
swing wide to the left before starting the turn.
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MI 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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