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Put the steps of constructing a plain scale in order.

1. Divide the first main division into subdivisions   2. Compute the length of scale from the fraction and maximum length   3. Determine the representative fraction   4. Divide the length into equal main divisions

  • A.3, 4, 2, 1
  • B.3, 2, 1, 4
  • C.3, 2, 4, 1
  • D.2, 3, 4, 1

Answer: C

Correct answer: 3, 2, 4, 1

Each step needs the one before it. Fix the representative fraction first, from what must fit on the sheet. Compute the length of scale from that fraction and the maximum length to be read. Divide that length into equal main divisions for the larger unit. Finally subdivide the first main division for the smaller unit, placing the zero at its right-hand end.

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