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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Minnesota 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 Minnesota CDL Manual. Take this practice test now to prepare for the actual MN CDL combination test!
1.
If a vehicle is equipped with ABS, when you start the engine:
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the ABS indicator light on the dash should come on and then turn off.
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the trailer emergency brakes will come on.
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the spring brakes will come on.
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the wheels will lock up.
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2.
Rollovers happen when drivers:
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stop too often.
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brake too hard.
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turn too fast.
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turn too slowly.
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3.
Which of the following will NOT help you prevent rollover?
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Driving slowly around turns.
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Using the controlled braking method.
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Keeping the cargo as close to the ground as possible.
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All of the above.
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4.
When backing a tractor under a trailer, you should:
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stop before when the kingpin is locked into the fifth wheel.
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back at an angle.
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always use the lowest reverse gear.
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All of the above.
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5.
Which of the following is NOT a step in backing up with a trailer?
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Looking at your line of travel before you begin
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Checking the outside mirrors on both sides frequently
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Backing slowly
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Backing quickly when the path is straight
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6.
When driving trucks with trailers, drivers should:
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push the brake pedal to the floor when braking.
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avoid making sudden movements with the steering wheel.
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decrease their following distance.
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make quick lane changes.
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7.
If you discover a fire, before opening trailer doors you should:
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use the fire extinguisher on the doors.
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feel the doors to see if they are hot.
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have a helper open the doors.
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All of the above.
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8.
If your ABS is not working:
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you still have normal brake functions, and should drive and brake as you always have.
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you should immediately bring your vehicle to a complete stop.
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the drive wheels will begin to spin, and you should take your foot off the accelerator.
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it will slow your truck to a halt and force you to pull over.
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9.
Under-loaded front axles can:
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cause the drive wheels to spin easily.
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make the steering axle weight too light to steer safely.
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cause poor traction.
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All of the above.
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10.
With brake drums, if brakes become too hot:
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the air compressor will kick on to cool the brakes.
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your ABS will malfunction.
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the brakes may stop working.
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the brakes will supply too much power to the drive wheels.
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