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An enlarging scale has a representative fraction that is

  • A.negative in value by convention
  • B.greater than unity
  • C.less than unity but greater than zero
  • D.exactly equal to unity in every case

Answer: B

Correct answer: greater than unity

The representative fraction is the drawing length divided by the actual length, so a drawing larger than the object gives a fraction above one. A watch escapement drawn at 10:1 has a representative fraction of 10. Full size is exactly unity and any reduction gives a fraction between zero and one.

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