AIR BRAKES CDL PRACTICE TEST - IOWA
11.
When backing a trailer, you should:
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avoid correcting the drift.
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try to position your vehicle so you can back in a straight line.
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turn the steering wheel in the direction you want to go.
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12.
When the spring brakes are on, you should never:
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change lanes.
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upshift.
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push the brake pedal down.
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13.
Brake drums or discs must not have cracks longer than ____ the width of the friction area.
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1/3
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1/4
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1/2
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14.
To prevent rollover, you should:
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go slowly around turns.
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keep the cargo as close to the ground as possible.
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All of the above.
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15.
In air-operated disc brakes, the pressure of the ______ on the ______ turns a "power screw".
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slack adjuster; tie rod
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brake chamber; slack adjuster
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brake camshaft; tie rod
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