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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

All Topics  9594

Humidity chart is useful for the solution of problems concerning condensation, vaporisation and air conditioning. At a given dry bulb temperature, value of humidity obtained from the humidity chart directly, is in terms of _______________ humidity?
A Molal
B Relative
C Percentage
D None of these
Correct Answer: Molal
Powdery materials can be guarded against caking tendency on storage by_________________?
A Providing irregular grain size
B Providing minimum percentage of voids
C Having maximum possible points of contact
D None of these
Correct Answer: None of these
The minimum liquid rate to be used in an absorber corresponds to an operating line_______________________?
A Of slope = 1
B Of slope = 0.1
C Tangential to the equilibrium curve
D None of these
Correct Answer: Tangential to the equilibrium curve
Separation of two volatile liquids by distillation makes use of their________________________?
A Selectivity
B Relative volatility
C Solubility
D Density difference
Correct Answer: Relative volatility
The critical moisture content in case of drying indicates the _______________ rate period?
A Beginning of falling
B Beginning of constant
C End of falling
D None of these
Correct Answer: Beginning of falling
The drying time between fixed moisture content within diffusion controlled ‘falling rate period’ is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid) ?
A √T
B T
C T2
D T3
Correct Answer: T
The dew point of an unsaturated gas-vapor mixture does not depend upon the ____________________ of the mixture?
A Composition
B Temperature
C Total pressure
D All A., B. and C.
Correct Answer: Temperature
The slope of 9-line is determined by the______________________?
A Reflux ratio
B Plate efficiency to be achieved
C Thermal condition of the feed
D Relative volatility
Correct Answer: Thermal condition of the feed
Freundlich equation applies to the adsorption of solute from_____________________?
A Dilute solutions, over a small concentration range
B Gaseous solutions at high pressure
C Concentrated solutions
D None of these
Correct Answer: Dilute solutions, over a small concentration range
A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids))_____________?
A M(Xo – XF)
B M(Xo/XF)
C M ln(Xo/XF)
D MXo ln(Xo/XF)
Correct Answer: MXo ln(Xo/XF)
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