COMBINATION PRACTICE TEST - MI CDL
11.
Tests have shown that trucks with a high center of gravity are more likely to tip over, therefore you should:
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distribute the cargo as low as possible.
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put the lightest parts of the cargo under the heaviest parts.
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All of the above.
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12.
What happens when the center of gravity of a truck moves higher up from the road?
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The vehicle is more stable while turning.
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The truck becomes easier to turn over.
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It is easier it is to turn around corners.
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13.
When should you use chocks to park a trailer without spring brakes?
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Only when parking downhill
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Never
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Always
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14.
When going down grades, you should:
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shift up.
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put the transmission in Neutral.
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downshift to a lower gear.
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15.
Rollovers happen when drivers:
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turn too slowly.
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brake too hard.
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turn too fast.
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16.
To avoid rollbacks when you start, you should:
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if you have manual transmission, partly engage the clutch before you take your right foot off the brake.
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release the parking brake only when you have applied enough engine power.
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All of the above.
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17.
If your vehicle is equipped with air brakes, loss of air pressure in the emergency line will cause:
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the vehicle to slide back and forth.
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the trailer emergency brakes to come on.
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the springs to put on the brakes.
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18.
Dual tires:
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should always come in contact with each other.
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should come in contact with each other whenever possible.
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should not come in contact with each other.
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19.
When backing a tractor under a trailer, you should:
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always use the lowest reverse gear.
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back at an angle.
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stop before when the kingpin is locked into the fifth wheel.
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20.
In a vehicle with a dual air brake system:
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each system has its own air tanks.
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both systems typically operate the regular brakes on the rear axle.
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one system supplies air to the trailer.
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