Pressure of 0.01 psi (absolute) can be measured by ______________ gauge?
Correct answer: C. Mcleod
- A. Ionisation
- B. Pirani
- C. Mcleod
- D. None of these
Explanation
A pressure of 0.01 psi absolute is about 0.52 mmHg, which lies in the low-pressure range commonly measured by a McLeod gauge. Ionisation gauges are used at much lower pressures, while Pirani gauges are generally used for rougher vacuum measurement.
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