1. Rigorous methods are only applied to
a) Small columns
b) Large columns
c) Dual columns
d) Triple columns
Explanation: Rigorous methods are only applied to Small columns for final design checks, whereas trial and error involves for final calculations.
2. Rigorous methods are used as primary
a) Stage calculation tools
b) Cost calculation tools
c) Control optimization tools
d) Design and optimization tools
Explanation: Rigorous methods are used as primary Design and optimization tools and Procuring methods are used for calculations of cost and stages.
3. An equilibrium stage that contains no feed, side products or heat exchangers is called
a) Final stage
b) Simple stage
c) First stage
d) Exit stage
Explanation: An equilibrium stage that contains no feed, side products or heat exchangers is called Simple stage.
4. A stage that contains more than one feed, side products or heat exchangers is called
a) Simple stage
b) Multi Stage
c) Complex stage
d) Pure stage
Explanation: A stage that contains more than one feed, side products or heat exchangers is called Complex stage.
5. In a multicomponent operation, i and j are
a) Variables of flow
b) Component and stage
c) Reflux and Boil up
d) Feed ratio
Explanation: In a multicomponent operation i and j are Component and stage, where I represents the gas phase and j as the liquid one.
6. MESH stands for?
a) Material, equilibrium, summation and heat
b) Mass, equilibrium, simulation and heat
c) Makeup, equilibrium, subject and heat
d) Material, equilibrium, summation and Height
Explanation: MESH stands for Material, equilibrium, summation and heat, all these components are equally important for the column specifications and design analysis.
7. When a solution is said to be formed?
a) All MESH equation are zero
b) All MESH equation are infinite
c) All MESH equation are satisfied
d) All MESH equation are unity
Explanation: When all MESH equation are satisfied a solution is said to be formed, when MESH are zero this represent the error in calculations.
8. Murphree equation is used for calculating?
a) Stage calculation
b) Equilibrium condition
c) Reflux ratio
d) Tray efficiency
Explanation: Murphree equation is used for calculating Tray efficiency and reflux ratio is calculated as L/D and equilibrium conditions given by y* = x.
9. The term KijVj/Lj is called
a) Stripping factor
b) Absorption Factor
c) Reflux Ratio
d) Boil up
Explanation: The term KijVj/Lj is called Stripping factor, where Kij represents the k factor and V and L are gas and liquid flow rates respectively.
10. The term Lj/VjKij is called
a) Stripping factor
b) Absorption Factor
c) Reflux Ratio
d) Boil up
Explanation: The term Lj/VjKij is called Absorption Factor, this is also called as the inverse of the stripping factor.