Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability ?
Correct answer: D. Alcohol in glass thermometer
- A. Mercury in glass thermometer
- B. Nitrogen in steel thermometer
- C. Fused metal (Na or K) in steel thermometer
- D. Alcohol in glass thermometer
Explanation
Alcohol remains liquid at much lower temperatures than mercury, so an alcohol-in-glass thermometer has the lowest temperature range among these filled-system thermometers. The other devices are mainly suited to higher-temperature measurement.
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