Pirani gauge is used for the measurement of________________?
Correct answer: B. High vacuum
- A. Very high pressure
- B. High vacuum
- C. Liquid level under pressure
- D. Liquid level at atmospheric pressure
Explanation
A Pirani gauge measures very low pressures by relating the heat loss from a heated filament to the gas pressure, so it is used for high-vacuum measurement. It is not a liquid-level instrument or a high-pressure gauge.
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