OREGON CDL COMBINATION PRACTICE TEST
11.
To be in the proper position for coupling, the fifth wheel should:
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tilted up towards the rear of the tractor.
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have its jaws closed around the shank of the kingpin.
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be level with the ground.
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be tilted down towards the rear of the tractor.
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12.
If the drive wheels start to skid:
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push in the clutch to let them turn freely.
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use the brakes to slow down.
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accelerate slightly to regain control.
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All of the above.
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13.
Do NOT use the parking brakes:
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when you park for less than two hours.
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to test that they work.
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when you leave your vehicle.
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if the brakes are very hot.
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14.
Before entering an intersection, make sure that:
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there's enough room to get at least halfway across.
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accelerate smoothly and change gears as necessary.
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That there is enough room for the rear of your vehicle to clear the stop line on your side.
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there is sufficient space to clear it.
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15.
Which of the following is NOT part of the procedure to raise the landing gear?
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Raising the landing gear all the way up
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Safely securing the crank handle, after raising the landing gear
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Using the low range gear, if equipped, to begin raising the landing gear
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Using the high range gear, if equipped, to begin raising the landing gear
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16.
If ABS is not working:
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you should use the emergency brake.
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you will not have any brakes.
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you should use the parking brake.
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you will still have brakes.
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17.
When you make a quick lane change, the crack-the-whip effect can turn the trailer over. The crack-the-whip effect is caused by:
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strong wind.
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worn tire tread.
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the rear trailer of a triple.
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rearward amplification.
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18.
You are coupling a tractor to a semi-trailer and have backed up but are not yet under the trailer. Before backing under the semi-trailer, you should hook up:
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the safety chain.
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the emergency and service air lines.
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the electrical service cable.
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the landing gear.
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19.
When backing a trailer, if you turn the wheel left:
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the cab 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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the cab will go left and the trailer will go right.
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the cab and the trailer will go left.
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20.
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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make sure that the release arm is in the engaged position.
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go slowly around turns.
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keep the vents clear so they work correctly.
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