Low pressure steam (with saturation temperature between 105 to 120°C) is usuall

Question

Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about __________ mm Hg (referred to a 760 mm mercury barometer).

Options:

A . 250

B . 450

C . 650

D . 750

Answer: Option C

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