Pressure of 0.0001 absolute psi can be measured by _____________ gauge?
Correct answer: A. Mcleod
- A. Mcleod
- B. Pirani
- C. Thermocouple
- D. None of these
Explanation
A pressure of 0.0001 absolute psi is an extremely high vacuum, about 0.005 torr. A McLeod gauge measures very low absolute pressures by compressing a known volume of gas with mercury, whereas ordinary mechanical gauges cannot operate in this range.
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