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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

A coalescer in a mixer-settler liquid-liquid extraction column______________________?

A Comprises of thin bed of substances of extended surface having high porosity
B Helps in increasing the bubble size entering the settler
C Helps in increasing the settling rate of the bubbles
D All ‘a’, ‘b’, & ‘c’
Correct Answer: All ‘a’, ‘b’, & ‘c’

During constant rate drying period, vaporisation rate per unit drying surface area _____________________?

A Decreases with time
B Increases with time
C Does not change with time
D Does not affect the moisture content of the wet solid
Correct Answer: Does not change with time

In a distillation column, with increase in the reflux ratio, the heat removed in the cooler ______________________?

A Increases
B Decreases
C Remains unaffected
D And the heat required in reboiler decreases
Correct Answer: Increases

The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will______________________?

A Increase
B Decrease
C Remain same
D Depend on saturated boiling point; may increase or decrease
Correct Answer: Increase

In most of the vacuum crystalliser, vacuum is generally produced by means of a_____________________?

A Suction pump
B Compressed air jet
C Steam jet ejector with a barometric condenser
D None of these
Correct Answer: Steam jet ejector with a barometric condenser

__________________ is concerned with the adsorption equilibria?

A Fick’s law
B Gibb’s equation
C Freundlich equation
D None of these
Correct Answer: Freundlich equation

‘ADDUCTS’ and ‘CLATHRATES’ are used in case of_____________________?

A Extractive distillation
B Crystallisation
C Absorption
D None of these
Correct Answer: Crystallisation

The percentage humidity is less than the relative humidity only at __________________ percent humidity?

A Zero
B Hundred
C Both zero and hundred
D None of these
Correct Answer: Both zero and hundred

At constant pressure, with increase of temperature, the dew point will ________________________?

A Increase
B Decrease
C Remain unchanged
D Increase/decrease; depends on the temperature
Correct Answer: Increase

NSc/NPr is called the______________________?

A Psychrometric ratio
B Lewis number
C Sherwood number
D Stanton number
Correct Answer: Lewis number
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