WI CDL COMBINATION TEST - PRACTICE TEST
11.
Which of the following makes a rollover more likely?
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Weight that is loaded so there is a high center of gravity.
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Turning too fast.
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If the load is to one side so it makes a trailer lean.
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All of the above.
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12.
When driving in a construction zone, if a construction worker is near the road, you should:
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speed up.
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maintain a constant speed.
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come to a complete stop.
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further reduce your speed.
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13.
On any upgrade, gravity:
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doubles your speed.
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doesn't affect your speed.
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speed you up.
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slows you down.
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14.
The iron trailer supports are up, and the full weight of the trailer is resting on the tractor. Make sure:
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you are in a low enough gear.
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the safety latch is not engaged.
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there is enough clearance between the rear of the tractor frame and the landing gear.
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there is enough clearance between the upper and lower fifth wheel.
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15.
When you park trailers without spring brakes, you should use wheel chocks:
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to keep the trailer from moving.
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to prevent overheating.
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to prevent the transmission from shifting up.
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to prevent air from escaping.
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16.
Enough tread is especially important in winter conditions. You need at least ________ tread depth on steering axle tires.
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6/24 inch
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4/32 inch
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8/32 inch
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2/8 inch
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17.
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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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 front trailer of a double
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The rear trailer of a triple
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The rear trailer of a double
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19.
If your vehicle has dummy couplers, why should you use them when the air lines are not connected to a trailer?
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To prevent freezing of the washer liquid.
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To prevent water and dirt from getting into the coupler and the air lines.
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Because if you don't, you will never build system pressure.
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To prevent overheating.
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20.
You have uncoupled a trailer and want to inspect the landing gear. The tractor should be positioned:
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completely clear of the trailer.
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with the tractor frame under 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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