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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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.

In gas-liquid contact operation, the number of ideal stages, N = (xa – xb)/(xb – x*b). This is true when the stripping factor ‘S’ is ________________?

A S > 1

B S < 1

C S = 1

D S = ∞

Review Detailed Answer

Correct Answer: S > 1

The Reynolds number of the liquid was increased 100 fold for a laminar falling film used for gas-liquid contacting. Assuming penetrating theory is applicable, the fold increase in the mass transfer co-efficient (Kc) for the same system is_______________________?

A 100

B 10

C 5

D 1

Review Detailed Answer

Correct Answer: 10

Large scale usage of flash distillation is practised in __________________?

A Soap manufacturing

B Ammonia synthesis plant

C Polymerisation industry

D Petroleum refining

Review Detailed Answer

Correct Answer: Petroleum refining

The boiling points of pure components of a binary system ________________ with increase in total pressure of the system ?

A Decreases

B Increases

C Remains unchanged

D May increase or decrease, depends on the system

Review Detailed Answer

Correct Answer: Increases

During sensible cooling process ______________________?

A Relative humidity decreases

B Relative humidity increases

C Wet bulb temperature decreases

D Both B. and C.

Review Detailed Answer

Correct Answer: Both B. and C.

The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if___________________?

A NSc = 1

B NSc = NPr = NLe

C NPr = NLe

D NSc = NLe

Review Detailed Answer

Correct Answer: NSc = NPr = NLe

Pick out the wrong statement ?

A Absorption factor is constant, when the equilibrium and operating lines are straight

B In case of a stripper, the equilibrium curve is always below the operating line

C In case of an absorber, the operating line is always above the equilibrium curve

D In the absorption of low solubility gases, the liquid film is the controlling resistance

Review Detailed Answer

Correct Answer: In case of a stripper, the equilibrium curve is always below the operating line

In triangular co-ordinates, the ternary composition point falls ___________________ of the triangle?

A In the corners

B Inside

C On the sides

D None of these

Review Detailed Answer

Correct Answer: Inside

Co-current absorbers are usually used when the gas to be dissolved in the liquid is ___________________?

A Sparingly soluble

B Highly soluble

C A pure substance

D A mixture

Review Detailed Answer

Correct Answer: A pure substance

When acetone is added in a two layer mixture of methyl isobutyl ketone and water at 30°C, the acetone distributes between the two layers and the composition of the layer follows two solubility curves. For this system ?

A As the acetone concentration increases, the solubility curves approach each other

B Both the phases become identical at a particular common point on both the solubility curves

C The distribution curve which is a plot between x (acetone concentration in one phase) and y

D All A., B. and C.

Review Detailed Answer

Correct Answer: All A., B. and C.

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

In gas-liquid contact operation, the number of ideal stages, N = (xa – xb)/(xb – x*b). This is true when the stripping factor ‘S’ is ________________?

The Reynolds number of the liquid was increased 100 fold for a laminar falling film used for gas-liquid contacting. Assuming penetrating theory is applicable, the fold increase in the mass transfer co-efficient (Kc) for the same system is_______________________?

Large scale usage of flash distillation is practised in __________________?

The boiling points of pure components of a binary system ________________ with increase in total pressure of the system ?

During sensible cooling process ______________________?

The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if___________________?

Pick out the wrong statement ?

In triangular co-ordinates, the ternary composition point falls ___________________ of the triangle?

Co-current absorbers are usually used when the gas to be dissolved in the liquid is ___________________?

When acetone is added in a two layer mixture of methyl isobutyl ketone and water at 30°C, the acetone distributes between the two layers and the composition of the layer follows two solubility curves. For this system ?