1000+ Mass Transfer Objective Type Questions and Answers - 1
Question: 1
Minimum reflux ratio in a distillation column results
(A) optimum number of trays
(B) optimum number of trays
(C) minimum reboiler size
(D) maximum condenser size
Ans: D
maximum condenser size
Question: 2
Solvent used in extractive distillation
(A) does not alter the relative volatility of the original components
(B) forms a high boiling azeotrope
(C) forms a low boiling azeotrope
(D) is of low volatility
Ans: C
forms a low boiling azeotrope
Question: 3
When a multistage tray tower uses a minimum reflux ratio, it implies
(A) minimum trays and maximum reboiler heat load
(B) minimum trays and minimum reboiler heat load
(C) infinite trays and maximum reboiler heat load
(D) infinite trays and minimum reboiler heat load
Ans: C
infinite trays and maximum reboiler heat load
Question: 4
When warm saturated air is cooled
(A) specific humidity increases and relative humidity decreases
(B) excess moisture condenses and specific humidity increases but relative humidity remains unchanged
(C) excess moisture condenses but relative humidity remains unchanged
(D) excess moisture condenses
Ans: D
excess moisture condenses
Question: 5
High pressure at the bottom of a distillation tower handling heat sensitive materials results in
(A) erosion of the tower
(B) very efficient operation
(C) increased relative volatility
(D) thermal decomposition of bottoms
Ans: D
thermal decomposition of bottoms
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