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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.

Increasing the liquor level in the evaporator results in the_______________?

A Decreased capacity

B Increase in liquor film co-efficient

C Decreased effect of hydrostatic head

D Increased true temperature drop

Review Detailed Answer

Correct Answer: Decreased capacity

In case of a shell and tube heat exchanger, the minimum and maximum baffle spacing is respectively (where, D = inside diameter of the shell) ?

A D/5 and D

B D/2 and 2 D

C D/4 and 2 D

D D and 2 D

Review Detailed Answer

Correct Answer: D/5 and D

Double pipe heat exchangers are used__________________?

A When heat transfer area required is very high

B When heat transfer area required is very low, i.e. (100-200 ft2).

C Because it occupies less floor area

D Because it is less costly

Review Detailed Answer

Correct Answer: When heat transfer area required is very low, i.e. (100-200 ft2).

A body is called grey if the monochromatic emissivity of the body is___________________?

A Zero

B Unity

C Same for all wavelengths

D Different for all wavelengths

Review Detailed Answer

Correct Answer: Same for all wavelengths

While the total emissivity of a perfect black body is unity, the same for a real body is__________________?

A 0

B 1

C > 1

D Between 0 and 1

Review Detailed Answer

Correct Answer: 0

Crystal size in a continuous crystalliser depends upon the___________________?

A Rate of heat transfer

B Degree of turbulence

C Degree of super-saturation

D All A., B. and C

Review Detailed Answer

Correct Answer: All A., B. and C

Boiling of milk in an open vessel is an example of ______________ boiling?

A Film

B Sub-cooled

C Saturated nucleate

D None of these

Review Detailed Answer

Correct Answer: Film

Black liquor generated during paper manufacture is concentrated in a___________________?

A Single effect evaporator

B Single effect evaporator followed by a crystalliser

C Multiple effect evaporator

D Multiple effect evaporators followed by a crystalliser

Review Detailed Answer

Correct Answer: Multiple effect evaporator

What is Nusselt number ?

A CP. μ/k

B hD/k

C h. CP/μ

D CP. μ/h

Review Detailed Answer

Correct Answer: hD/k

In the equation Q = UAΔt; Δt is_________________________?

A Geometric mean temperature difference

B Arithmetic mean temperature difference

C Logarithmic mean temperature difference

D The difference of average bulk temperatures of hot and cold fluids

Review Detailed Answer

Correct Answer: Logarithmic mean temperature difference

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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All Topics 9594

Increasing the liquor level in the evaporator results in the_______________?

In case of a shell and tube heat exchanger, the minimum and maximum baffle spacing is respectively (where, D = inside diameter of the shell) ?

Double pipe heat exchangers are used__________________?

A body is called grey if the monochromatic emissivity of the body is___________________?

While the total emissivity of a perfect black body is unity, the same for a real body is__________________?

Crystal size in a continuous crystalliser depends upon the___________________?

Boiling of milk in an open vessel is an example of ______________ boiling?

Black liquor generated during paper manufacture is concentrated in a___________________?

What is Nusselt number ?

In the equation Q = UAΔt; Δt is_________________________?