Vacuum maintained in the vacuum distillation column in oil refinery is – McqOptions

MCQOPTIONS

1.	Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute.
A.	1 to 5
B.	30 to 80
C.	250 to 350
D.	450 to 500
Answer» C. 250 to 350

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