Vacuum maintained in the vacuum distillation tower of the crude
distillation plant is about __________ mm Hg (absolute).
(A) 5-10
(B) 30-80
(C) 150-250
(D) 350-400
distillation plant is about __________ mm Hg (absolute).
(A) 5-10
(B) 30-80
(C) 150-250
(D) 350-400