COMBINATION PRACTICE TEST - DE CDL
11.
To reduce the chance of rollover, you should:
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place the cargo as high as possible inside the trailer.
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distributed the cargo as low as possible inside the trailer.
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put the lightest parts of the cargo under the heaviest parts.
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None of the above.
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12.
Tests have shown that trucks with a high center of gravity:
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can roll over at the posted speed limit for a curve.
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can roll over if the driver exceeds the posted speed limit for a curve.
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are less likely to roll over when entering a curve.
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can roll over if the driver slows down before entering a curve.
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13.
If your truck catches fire, the first thing you should do is to:
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pull off the road and park in an open area.
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get off the vehicle, open the hood and start shooting foam to keep the engine cool.
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pull into a service station and call for help.
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get the vehicle off the road and park near other vehicles.
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14.
When you back under a trailer:
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back the tractor slowly.
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use lowest reverse gear.
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make sure the trailer brakes are locked.
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All of the above.
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15.
To test the service brake:
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push the brake pedal firmly while going about 5 mph.
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shift your transmission to a low gear, pump the brake pedal three times, then hold it down for five seconds.
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gently try to pull forward with the trailer parking brake on, then release the brake.
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push the brake pedal firmly while slowly moving backward.
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16.
When connecting the glad hands, you should press the two seals together with the couplers at a ______ angle to each other.
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30 degree
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180 degree
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45 degree
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90 degree
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17.
What happens when the center of gravity of a truck moves higher up from the road?
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The truck becomes easier to turn over.
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The vehicle is more stable while turning.
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It is easier it is to turn around corners.
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It becomes much easier to downshift at the right rpm.
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18.
The best way to recognize that your trailer has started to skid is:
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by opening the window and feeling the front of the mirror.
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by recognizing tire failure.
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by seeing it in your mirrors.
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by feeling the brakes come on.
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19.
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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distribute the cargo so the majority of the weight is on the steering axle.
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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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20.
After the pre-trip inspection, drivers should inspect their cargo and its securing devices again within ________ after beginning the trip.
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two hours
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50 miles
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25 miles
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20 miles
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