Engineering Questions with Answers - Multiple Choice Questions
Distillation Design MCQ’s – Computer Simulation Result Analysis
More volatile keys are defined as
a) Heavy key (H)
b) Over Key (O)
c) Light Key (L)
d) Down comer Key (D)
Explanation: Keys must differ in volatility more volatile is the Light Key (L), while the less volatile keys are defined as Heavy key (H)
Components heavier than the heavy key are finally
a) Recovered in the Condenser
b) Recovered in the bottom stream
c) Recovered in the Upsides stream
d) Not recovered
Explanation: Components heavier than the heavy key are finally separated at bottom stream and light key at the top.
For an infinite number of plates required, the desired separation
a) Hardly possible
b) Finely possible
c) Can’t be specified
Explanation: At infinite plates for reflux ratio, the desired separation is just barely possible, while for fixed number of trays the separation can be assumed.
Which of the following model is best for computer simulation?
a) Auto Model
b) HYSYS Model
c) Cremer Model
d) Two parameter model
Explanation: For computer simulation HYSYS Model is widely used, auto model is used to design automobiles, whereas two parameter model is used in reaction operations.
For computer simulation, considerations were defined by
a) Richardson and Coulson
b) Robinson and Gilliland
c) Murphree and Fenske
d) Johnson and Morgan
Explanation: Key considerations were defined by Johnson and Morgan and Robinson and Gilliland gave the correlation of stages and Richardson and Coulson are famous chemical engineering authors.
For identifying misallocated feed stages, which of the following is used?
a) Key Ratios
b) Molar Ratios
c) Reflux Ratios
d) Feed Ratios
Explanation: Misallocated feed stages are identified using Key Ratios, while separation are identified using the feed ratios.
Key ratios and stages are plotted on which scale?
a) Binary scale
b) Exponential Scale
c) Semi log scale
d) Pressure scale
Explanation: Key ratios and stages are plotted on Semi log scale, and equilibrium relation are plotted on binary scale.
d/b plots are also called as
a) Key plots
b) Mole plots
c) Reflux plots
d) Non Key plots
Explanation: They are called as key plots always, where d is the higher key representative and b the lower one.
d/b plots are used when there is
a) Non key components
b) Total reflux
c) Boil up required
d) Can’t be specified
Explanation: The d/b plots are used when there is tight spacing on non-key components, while full withdrawal of product is called as total reflux.
d/b plots are
d) Non linear
Explanation: The d/b plots are frequently Nonlinear, equilibrium plots are nonlinear and diagonal plots are linear.