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A diagonal scale can measure

  • A.two successive units of a measurement
  • B.four successive units of a measurement
  • C.one unit of measurement to great precision
  • D.three successive units of a measurement

Answer: D

Metres, decimetres and centimetres can all be read from a single scale, the third unit coming from the diagonal divisions. It is the standard construction where a distance must be read to two places beyond the principal unit.

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