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A paper machine drive train requires

  • A.a single drive for the whole machine with no sections
  • B.one-quadrant operation without any speed control
  • C.the largest possible starting torque at each section
  • D.precise speed ratios between many sections

Answer: D

The sheet is drawn through press, dryer and calender sections whose speeds must be held in exact and adjustable ratio, or the web wrinkles or tears. An electronic line shaft distributing a common position reference is the modern arrangement.

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