COMBINATION PRACTICE TEST - WY CDL
11.
Which of the following is NOT part of checking the sliding fifth-wheel?
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Testing the tractor protection valve
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Checking that the slide is not damaged or parts are missing
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Checking that it is properly greased
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Checking that all locking pins are present and locked in place
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12.
What should you do if your vehicle gets stuck on the railroad tracks?
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Turn on the emergency flashers and call 911.
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Get out of the vehicle and away from the tracks as quickly as possible, then call 911.
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Call 911, then get out of the vehicle and away from the tracks.
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Stay inside the vehicle and call 911.
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13.
One way to prevent hydroplaning is to:
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have less than 4/32 inch tread depth in every major groove on front tires.
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take curves at higher speeds.
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use the controlled braking method.
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make sure you have enough tread on your tires.
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14.
Most truck driver deaths in crashes result from:
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truck rollovers.
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off-tracking.
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following too closely.
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driving side-by-side with another truck.
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15.
You supply air to the trailer brake system by:
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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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connecting the tractor service air line to the trailer service glad hand.
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pulling out the trailer air supply valve.
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16.
Cargo should be properly covered:
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to block your view or someone else’s.
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to protect the weather from the cargo.
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to protect people from spilled cargo.
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All of the above.
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17.
Which of the following is not a reason for covering cargo?
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To protect the cargo from weather
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To prevent other drivers from looking at the cargo
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To protect people from spilled cargo
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All of the above.
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18.
On front tires, tread should be at least:
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4/16 inch
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2/32 inch
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1/16 inch
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4/32 inch
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19.
A bridge formula permits:
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more maximum axle weight for axles that are far apart.
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less maximum axle weight for axles that are far apart.
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less maximum axle weight for axles that are close together.
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more maximum axle weight for axles that are closer together.
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20.
When backing a tractor under a trailer, you should:
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always use the lowest reverse gear.
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stop before when the kingpin is locked into the fifth wheel.
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back at an angle.
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All of the above.
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