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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.

Economy of an evaporator is influenced by the_____________________?

A Steam pressure

B Feed temperature

C Number of effect

D Both B. & C.

Review Detailed Answer

Correct Answer: Both B. & C.

‘Fouling factor’ used in the design of a multipass shell and tube heat exchanger is a_____________________?

A Non-dimensional factor

B Factor of safety

C Conversion factor for individual film heat transfer co-efficient to overall heat transfer coefficient

D None of these

Review Detailed Answer

Correct Answer: Factor of safety

At Pr > 1, conduction in an ordinary fluid flowing through a heated pipe is limited to the___________________?

A Buffer zone

B Turbulent core

C Both A. and B.

D Viscous sub-layer

Review Detailed Answer

Correct Answer: Viscous sub-layer

Film boiling occurs at ________________ pressure?

A Atmospheric

B Sub-atmospheric

C Negative

D Very high

Review Detailed Answer

Correct Answer: Very high

Choose the most important factor on which the heat conducted through a wall in a unit time will depend on ?

A Thickness of the wall

B Area of the wall perpendicular to heat flow

C Material of the wall

D Temperature difference between the two surfaces of the wall

Review Detailed Answer

Correct Answer: Temperature difference between the two surfaces of the wall

Thickness of thermal boundary layer is more compared to that of hydrodynamic boundary layer, when the value of Prandtl number is_________________?

A 1

B < 1

C > 1

D > 5

Review Detailed Answer

Correct Answer: 1

Double pipe heat exchangers are preferably useful, when____________________?

A High viscosity liquid is to be cooled

B Requirement of heat transfer area is low

C Overall heat transfer co-efficient is very high

D A corrosive liquid is to be heated

Review Detailed Answer

Correct Answer: Requirement of heat transfer area is low

With increase in the distance between the heat source and the object receiving the heat, the radiation heat transfer ?

A Decreases

B Increases

C Increases exponentially

D Remain unaffected

Review Detailed Answer

Correct Answer: Decreases

For gases, the thermal conductivity increases with temperature rise. For liquids, with increase in concentration, its thermal conductivity generally ?

A Decreases

B Increases

C Remains unchanged

D Increases exponentially

Review Detailed Answer

Correct Answer: Decreases

For a counter current heat exchanger with Ti h = 80°C, T°c = 60°C, T°h = 50°C and Ti c = 30°C, and the temperature difference between the two streams being the same everywhere along Z, the direction of flow of hot fluid. The temperature profile should satisfy___________________?

A d2T/dZ2 > 0

B d2T/dZ2 = 0

C d2T/dZ2 < 0

D dT/dZ = 0

Review Detailed Answer

Correct Answer: d2T/dZ2 = 0

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

Economy of an evaporator is influenced by the_____________________?

‘Fouling factor’ used in the design of a multipass shell and tube heat exchanger is a_____________________?

At Pr > 1, conduction in an ordinary fluid flowing through a heated pipe is limited to the___________________?

Film boiling occurs at ________________ pressure?

Choose the most important factor on which the heat conducted through a wall in a unit time will depend on ?

Thickness of thermal boundary layer is more compared to that of hydrodynamic boundary layer, when the value of Prandtl number is_________________?

Double pipe heat exchangers are preferably useful, when____________________?

With increase in the distance between the heat source and the object receiving the heat, the radiation heat transfer ?

For gases, the thermal conductivity increases with temperature rise. For liquids, with increase in concentration, its thermal conductivity generally ?

For a counter current heat exchanger with Ti h = 80°C, T°c = 60°C, T°h = 50°C and Ti c = 30°C, and the temperature difference between the two streams being the same everywhere along Z, the direction of flow of hot fluid. The temperature profile should satisfy___________________?