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A pressure transducer specified as 0.1 per cent of full scale over a span of 10 bar has a possible error at a reading of 1 bar of

  • A.0.001 bar, that is 0.1 per cent of the reading
  • B.0.1 bar, that is 10 per cent of the reading
  • C.0.01 bar, that is 0.1 per cent of the reading
  • D.0.01 bar, that is 1 per cent of the reading

Answer: D

A tenth of one per cent of ten bar is 0.01 bar wherever the reading lies, so at one bar that absolute error is one per cent of the reading. Specifications given as a percentage of full scale always behave this way at the bottom of the range.

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