Psychrometry deals with the properties of gas-vapor mixture. Humidity can be determined by the measurement of the ________________ of a fibre ?
Correct answer: C. Electrical resistance
- A. Strength
- B. Thermal conductivity
- C. Electrical resistance
- D. None of these
Explanation
Moisture changes the electrical resistance of hygroscopic fibres, so fibre-resistance hygrometers can indicate humidity. Thermal conductivity is used in some gas analysers, but it is not the usual fibre-based measurement.
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