COMBINATION TEST VERMONT - PRACTICE TEST
11.
At speeds below 40 mph, you should leave at least one second in front of you for each ___ feet of vehicle length.
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20
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5
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10
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12.
When transporting cargo, the cargo should be checked:
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before the trip and after the first 50 miles.
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before the trip and after the first 150 miles.
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only before the trip.
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13.
Never
drive with landing gear only part way up. Why?
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It must be exactly 5 feet off the ground.
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It may catch on railroad tracks.
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It may be harder to use.
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14.
If your trucks has a high center of gravity, which of the following is true for curves?
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You should slow down, as your truck can roll over at the posted speed limit for the curve.
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Reduce your speed to a crawl.
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You should travel at the posted speed limit.
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15.
What can cause poor traction?
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Too much weight on the steering axle.
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Overloading the truck.
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Too little weight on the driving axles.
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16.
If you're feeling tired while driving you should:
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drink coffee.
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stop driving and get some rest.
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eat something.
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17.
In combination vehicles with air brakes, the trailer air supply control should pop out when the air pressure falls within the range of:
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20 to 45 psi
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10 to 20 psi
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100 to 120 psi
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18.
When parking a trailer without spring brakes, it is very important for safety that you use wheel chocks. Why?
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if you don't use wheel chocks, supply air will be sent to the service line instead of going to charge the trailer air tanks.
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The air could leak out of the trailer air tank, releasing its emergency brakes.
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You may not notice a major leak in the service line until you try to put the brakes on.
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19.
When backing a trailer, turn the wheel right to make the cab go ________ and the trailer go ________.
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left; left
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left; right
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right; left
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20.
If you get stuck on railroad tracks, you should:
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stay in the vehicle and call for help.
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get out of the vehicle and away from the tracks.
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have a helper push your vehicle.
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