MN CDL COMBINATION PRACTICE TEST
11.
The tire load rating is stated:
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inside the suspension system.
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on the side of each tire.
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on each axle.
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on the dashboard.
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12.
When approaching a stopped bus, you must be aware that:
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passengers crossing in front of the bus can always see you.
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passing a stopped bus is illegal.
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passengers may cross in front of or behind the bus.
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a student may be driving the bus.
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13.
You have uncoupled a trailer and want to inspect the landing gear. The tractor should be positioned:
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with the tractor frame above the trailer.
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with the tractor frame under the trailer.
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completely clear of the trailer.
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None of the above.
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14.
Which of these statements about brakes is true?
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Brake fade does not result from excessive heat.
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To stop, the brake shoes and linings are pushed against the outside of the drum.
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The lighter the vehicle, the more heat the brakes absorb to stop it.
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None of the above.
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15.
When should you use chocks to park a trailer without spring brakes?
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Never
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Always
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Only when parking uphill
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Only when parking downhill
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16.
Emergency lines on combination vehicles are often coded with the color ____ to keep from getting them mixed up with the ____ service line.
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yellow; black
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red; blue
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blue; red
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red; yellow
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17.
Strong winds can make it difficult to stay in your lane especially when driving:
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lighter vehicles.
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vehicles with ABS.
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flatbed trailers.
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heavier vehicles.
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18.
For a cargo fire in a box trailer, you should:
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open the doors immediately and use the fire extinguisher.
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use the fire extinguisher on the doors.
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wait 10 minutes before opening the doors.
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keep the doors shut.
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19.
Which of the following is NOT part of testing the trailer service brakes?
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Moving the vehicle forward slowly.
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Checking for normal air pressure.
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Releasing the parking brakes.
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Pushing in the trailer air supply knob.
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20.
If your vehicle has dummy couplers, why should you use them when the air lines are not connected to a trailer?
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To prevent overheating.
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To prevent freezing of the washer liquid.
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Because if you don't, you will never build system pressure.
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To prevent water and dirt from getting into the coupler and the air lines.
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