Question 547General Subjects - Assistant Engineer
70% to passSuppose that a standard remote reading bourdon tube thermometer has a scale of 40 to 240oF. If the accuracy of the thermometer is plus or minus 1% of the span, what would the range of measured temperature be if the thermometer indicates 180oF?
A177.6 to 182.4oF
B178 to 182oF
C178.2 to 181.8oF
D179 to 181oF
AI Explanation
The correct answer is B) 178 to 182°F. The reasoning is as follows: 1) The thermometer has a scale of 40 to 240°F, which means the span is 200°F (240°F - 40°F = 200°F). 2) The accuracy of the thermometer is ±1% of the span, which means ±2°F (1% of 200°F = 2°F). 3) If the thermometer indicates 180°F, the actual temperature range would be 180°F ± 2°F, which is 178 to 182°F. The other options are incorrect because: A) The range of 177.6 to 182.4°F exceeds the ±1% accuracy. C) The range of 178.2 to 181.8°F is too narrow and does not account for the full ±1% accuracy. D) The range of 179 to 181°F is too narrow and does not account for the full ±1% accuracy.
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