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This quiz contains multiple-choice problems on theoretical stages, constant molar overflow, McCabe-Thiele diagram fundamentals, line equations and construction, multi-component distillation key components and computer simulation result analysis.
The condition where reflux and stripping ratio approaches to infinity is called as
When heat is supplied to the bottom of liquid stage to vaporise a portion, it is called
Condensing
Boil-up
Cooling
Desalting
When cooling is applied to condense a part of an overhead product, it is called
Reflux
Dew point
Boil-up
Relative BP
When rectifying, stripping, and combining both in single-stage process, this is called
Differentiation
Fractionation
Recycle
Purging
The external reflux ratio can be defined as
L{0}/D
D/L
D{0}/L
V/L
The boil-up ratio can be expressed as the ratio
V/L
D/V
V/W
L/W
Optimum reflux ratio ranges between
2 to 5
2 to 3
1.0 to 1.5
1.0 to 2.5
If stages are fixed, then reflux ratio
Decreases
Increases
Equals zero
Approaches infinity.
If reflux increases, then the cost of operation
First increases, then decreases
Goes on increasing
Approaches infinity
First decreases, then increases
HETP is defined as
High energy temperature point
High efficiency tower plate
Height equivalent to theoretical plate
Homotomy engineer temperature point
The minimum number of trays can be calculated using
Bernoulli’s eon
Henry’s law
Fenske’s equation
Homotomy equation
Which of the following is an important assumption of the McCabe-Thiele method?
Heat loss is maximum
Heat loss is negligible
Heat loss is infinite
Cannot be specified
The point where the equilibrium curve and the component balance meet is called
Murphree point
Intersection point
Junction point
Pinch point
Consider the following data, L’ = 363 and slope of the section is 1.55. Estimate the vapour flow rate on either side.
456
284
303
234
An ideal distillation stage is one that
Operates at steady state
Operates at high temperature
Operates at low pressure
Operates at high pressure
