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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.

_______________ paint has the maximum absorption coefficient ?

A Black

B Yellow

C White

D Grey

Review Detailed Answer

Correct Answer: Black

Baffles are provided in heat exchangers to increase the________________?

A Fouling factor

B Heat transfer area

C Heat transfer co-efficient

D Heat transfer rate

Review Detailed Answer

Correct Answer: Heat transfer co-efficient

Prandtl and Reynold’s analogies are identical for Prandtl number value of__________________?

A 0

B 0.5

C 1

D 5

Review Detailed Answer

Correct Answer: 1

The rate of heat transfer through a pipe wall is given by, q = 2π k (Ti – T0)/ln (ri/r0). For cylinder of very thin wall, q can be approximated by__________________?

A q = [2π k (Ti + T0)/2]/ln (ri/r0)

B q = 2π ri k (Ti – T0)/(r0/ri)

C q = 2π k (Ti – T0)/(r0/ri)

D q = 2π k (Ti – T0)/[(r0 + ri)/2]

Review Detailed Answer

Correct Answer: q = 2π k (Ti – T0)/[(r0 + ri)/2]

If a single tube pass heat exchanger is converted to two pass, then for the same flow rate, the pressure drop per unit length in tube side will ________________?

A Increase by 1.8 times

B Decrease by 22

C Increase by 216

D Remain unchanged

Review Detailed Answer

Correct Answer: Increase by 216

A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the _______________ number?

A Condensation

B Grashoff

C Stanton

D Brinkman

Review Detailed Answer

Correct Answer: Brinkman

Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by____________________?

A Keeping the heat transfer surface clean

B Enhancing the fluid pumping rate

C Increasing the tube length

D None of these

Review Detailed Answer

Correct Answer: Keeping the heat transfer surface clean

Which is the most suitable for the concert-ration of highly concentrated solution ?

A Open pan evaporation

B Long tube vertical evaporator

C Agitated film evaporator

D None of these

Review Detailed Answer

Correct Answer: Open pan evaporation

A hot liquid is kept in a big room. The logarithm of the numerical value of the temperature difference between the liquid and the room is plotted against time. The plot will be very nearly a/an___________________?

A Ellipse

B Straight line

C Parabola

D Circular arc

Review Detailed Answer

Correct Answer: Straight line

Maximum heat transfer rate can be expected in case of_________?

A Laminar flow

B Co-current flow

C Turbulent flow

D Heat flow rate is independent of nature of flow

Review Detailed Answer

Correct Answer: Turbulent flow

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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All Topics 9594

_______________ paint has the maximum absorption coefficient ?

Baffles are provided in heat exchangers to increase the________________?

Prandtl and Reynold’s analogies are identical for Prandtl number value of__________________?

The rate of heat transfer through a pipe wall is given by, q = 2π k (Ti – T0)/ln (ri/r0). For cylinder of very thin wall, q can be approximated by__________________?

If a single tube pass heat exchanger is converted to two pass, then for the same flow rate, the pressure drop per unit length in tube side will ________________?

A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the _______________ number?

Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by____________________?

Which is the most suitable for the concert-ration of highly concentrated solution ?

A hot liquid is kept in a big room. The logarithm of the numerical value of the temperature difference between the liquid and the room is plotted against time. The plot will be very nearly a/an___________________?

Maximum heat transfer rate can be expected in case of_________?