Liquid argon level in a pressurised storage tank (at 3 kg/cm2) is measured by a/an ____________________?
Correct answer: C. Differential pressure gage
- A. Gage glass
- B. External float gage
- C. Differential pressure gage
- D. None of these
Explanation
A differential-pressure gauge measures liquid level from the hydrostatic pressure difference between the tank bottom and the vapour space. This arrangement remains suitable when the tank is pressurised, unlike a simple gauge glass.
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