COMBINATION PRACTICE TEST - WA CDL
11.
Glad hands are used to:
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connect the brakes from the truck or tractor to the trailer.
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connect the electrical lines from the truck or tractor to the trailer.
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connect the service and emergency air lines from the truck or tractor to the trailer.
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12.
To prevent a rollover, you should keep the cargo as close to the ground as possible and:
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keep an eye on your tires.
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go slowly around turns.
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keep the vents clear so they work correctly.
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13.
If the ABS is not working:
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you still have normal brake functions.
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the vehicle will have weak brakes.
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the vehicle will have no brakes.
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14.
If your ABS is not working:
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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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it will slow your truck to a halt and force you to pull over.
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15.
Which of these is more likely to rollover due to the "crack-the-whip" effect?
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The last trailer of triples
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The last trailer of doubles
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The front trailer of 65 ft. conventional doubles
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16.
A high center of gravity means:
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you are more likely to tip over.
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a rollover is less likely.
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you'll have better traction.
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17.
You supply air to the trailer brake system by:
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connecting the tractor service air line to the trailer service glad hand.
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pushing in the trailer air supply knob.
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plugging the electrical cord into the trailer.
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18.
Poor weight balance:
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can make vehicle handling more difficult.
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improves handling.
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increases fuel efficiency.
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19.
If during vehicle inspection a tire is too hot to touch, you should:
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immediately decrease air pressure.
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let air out.
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remain stopped until the tire cools off.
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20.
When looking at your cargo covers in the mirrors while driving, you must be aware that a flapping cover:
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can tear loose, uncovering the cargo.
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keeps the cargo cool.
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helps keep the cargo as close to the ground as possible.
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