The ____________ of a vapor pressure thermometer is a secondary element ?
Correct answer: B. Bourdon tube
- A. Pointer
- B. Bourdon tube
- C. Bulb
- D. None of these
Explanation
The bulb senses temperature and is the primary element, while the Bourdon tube responds to the resulting vapour pressure and acts as the secondary element. The pointer only displays the motion of the secondary element.
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