COMBINATION PRACTICE TEST - TN CDL
11.
When backing a trailer, if you turn the wheel left:
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the cab and the trailer will go left.
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the cab and the trailer will go right.
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the cab will go left and the trailer will go right.
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the cab will go right and the trailer will go left.
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12.
If a load is 10 feet long, the minimum number of tie-downs required is:
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4
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2
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1
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3
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13.
When backing a trailer, you should:
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turn the steering wheel toward the direction you want to go.
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avoid braking.
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pull-up frequently to reposition the vehicle.
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not back up in a straight line.
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14.
What can cause poor traction?
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Too much weight on the steering axle.
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Too little weight on the driving axles.
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Overloading the truck.
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All of the above.
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15.
Before transporting sealed loads, you should check:
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a small sample of whatever is inside.
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the special transit permit.
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that you don't exceed gross weight and axle weight limits.
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None of the above.
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16.
When the trailer breaks away or develops a bad leak, the tractor protection valve will close automatically and:
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the trailer emergency brakes will come on.
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the trailer supply valve will stay open.
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the tractor will lose all air pressure.
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the engine will shut down.
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17.
If your ABS is not working:
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it will slow your truck to a halt and force you to pull over.
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you should immediately bring your vehicle to a complete stop.
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you still have normal brake functions, and should drive and brake as you always have.
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the drive wheels will begin to spin, and you should take your foot off the accelerator.
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18.
Which of the following is most likely to roll over?
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The middle trailer of a triple
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The rear trailer of a double
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The front trailer of a double
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The rear trailer of a triple
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19.
Which of the following is NOT part of a trailer air line system?
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Emergency air-line
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Glad hands
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Service air-line
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Kingpin
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20.
An item that is 15 feet long placed on a flatbed trailer should have at least:
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2 tie-downs.
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3 tie-downs.
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15 tie-downs.
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1 tie-down.
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