LA CDL COMBINATION TEST - PRACTICE TEST
11.
Never
drive with landing gear only part way up. Why?
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It may catch on railroad tracks.
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It may be harder to use.
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It must be exactly 5 feet off the ground.
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It makes it harder to brake.
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12.
Under-loaded front axles can:
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cause poor traction.
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cause the drive wheels to spin easily.
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make the steering axle weight too light to steer safely.
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All of the above.
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13.
A high center of gravity means:
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a rollover is less likely.
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the spring brakes will come fully on.
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you'll have better traction.
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you are more likely to tip over.
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14.
When you are driving on a slippery road, you should NOT:
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use the engine brake or speed retarder.
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keep a longer following distance.
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adjust turning and braking to road conditions.
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take curves at slower speeds.
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15.
You are coupling a tractor to a semi-trailer. You have backed up but are not yet under the trailer. Before backing under the semi-trailer, you should:
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remove the wheel chocks.
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connect the electrical cord and check the air lines.
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supply air to the trailer system and lock the trailer brakes.
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begin raising the landing gear.
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16.
After the pre-trip inspection, drivers should inspect their cargo and its securing devices again within ________ after beginning the trip.
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two hours
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50 miles
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25 miles
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20 miles
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17.
Having ABS on only the trailer:
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makes the trailer more likely to roll over.
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still gives you more control over your vehicle during braking.
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is very dangerous.
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makes the trailer more likely to swing out.
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18.
When you drive a tractor-trailer combination with ABS, you should:
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apply the trailer hand brake whe braking.
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brake as you always have.
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pump the brakes.
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always apply the brakes hard.
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19.
When driving on slippery surfaces, you should:
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not pass slower vehicles unless necessary.
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change lanes often.
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make turns as quickly as possible.
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All of the above.
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20.
When a vehicle goes around a corner, the rear wheels:
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will turn freely.
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follow a different path than the front wheels.
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will lock up.
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follow the same path as the front wheels.
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