COMBINATION PRACTICE TEST - WV CDL
11.
If the fifth-wheel locking lever is not locked after the jaws close around the kingpin:
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the parking brakes are on and the wheels are chocked.
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the parking brakes are on and your vehicle is safe to drive.
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cargo is properly blocked.
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the coupling is not right and you should not drive until you get it fixed.
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12.
When uncoupling a trailer, after shutting off the trailer air supply to lock the trailer brakes, you should:
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back up gently to ease the pressure on the fifth-wheel locking jaws.
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inspect the trailer supports.
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pull the tractor forward until the fifth-wheel comes out from under the trailer.
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immediately apply your tractor parking brakes.
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13.
Which of the following statements about off-tracking is true?
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When a vehicle goes around a corner, the rear wheels follow the same path as the front wheels.
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If there is more than one trailer, the rear wheels of the last trailer will off-track the most.
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Longer vehicles off-track less.
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None of the above.
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14.
You have uncoupled a trailer and want to inspect the landing gear. The tractor should be positioned:
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with the tractor frame under the trailer.
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completely clear of the trailer.
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with the tractor frame above the trailer.
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None of the above.
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15.
Which of the following is not a reason for covering cargo?
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To protect people from spilled 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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All of the above.
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16.
When the wheels of a trailer lock up:
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ABS will increase stopping power.
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the trailer will tend to swing around.
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the vehicle will gradually come to a complete stop.
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All of the above.
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17.
The wheels of a large combination vehicle are more likely to lock up when:
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the trailer has new tires.
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the vehicle is heavily loaded.
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you are traveling in very hot weather.
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the vehicle is lightly loaded.
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18.
You are driving a heavy vehicle with a manual transmission, and you have to stop on the shoulder while driving on an uphill grade. When putting your vehicle back in motion up the grade, you should:
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partly engage the clutch before you take your right foot off the brake.
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use the parking brake to hold the vehicle until the clutch engages.
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keep the clutch slipping while slowly accelerating.
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shift down to a speed that you can control without using the brakes.
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19.
Combination vehicles usually:
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require more driving skill than single CMVs.
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are easier to drive than single than single CMVs.
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are shorter than single than single CMVs.
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All of the above.
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20.
Do NOT use the parking brakes:
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when you park for less than two hours.
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if the brakes are very hot.
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when you leave your vehicle.
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to test that they work.
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