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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.

Prandtl number for most of dry gases is about________________?

A 0.001

B 0.72

C 70

D 150

Review Detailed Answer

Correct Answer: 0.72

Extremely large or small volumes of fluids are generally best routed through the shell side of a shell and tube heat exchanger, because of the________________?

A Less corrosion problems

B Flexibility possible in the baffle arrangement

C Low pressure drop

D High heat transfer co-efficient

Review Detailed Answer

Correct Answer: Flexibility possible in the baffle arrangement

The purpose of providing expansion bellows in the shell of tubular exchanger is to _____________________?

A Increase the heating load

B Impart structural strength

C Account for the uneven expansion of shell and tube bundles

D Facilitate increase of shell length, if needed

Review Detailed Answer

Correct Answer: Account for the uneven expansion of shell and tube bundles

Multipass heat exchangers are used______________________?

A Because of simplicity of fabrication

B For low heat load

C To obtain higher heat transfer co-efficient and shorter tube

D To reduce the pressure drop

Review Detailed Answer

Correct Answer: To obtain higher heat transfer co-efficient and shorter tube

It is not recommended to use a 1-2 shell and tube heat exchanger for a particular heat duty, whenever the LMTD correction factor is___________________?

A > 0.75

B < 0.75

C < 0.50

D < 0.25

Review Detailed Answer

Correct Answer: < 0.75

Finned tube heat exchangers__________________?

A Give larger area per tube

B Use metal fins of low thermal conductivity

C Facilitate very large temperature drop through tube wall

D Are used for smaller heat load

Review Detailed Answer

Correct Answer: Give larger area per tube

Fruit juice (a heat sensitive material) can be concentrated in a ____________ evaporator?

A Long tube

B Falling film

C High pressure

D None of these

Review Detailed Answer

Correct Answer: Falling film

The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re0.8, where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient varies with the pipe diameter D. as _________________?

A D-1.8

B D-0.2

C D0.2

D D1.8

Review Detailed Answer

Correct Answer: D-0.2

For heat flow through very thick walled cylinder, use ___________mean radius?

A Arithmetic

B Logarithmic

C Geometric

D Either A. or C.

Review Detailed Answer

Correct Answer: Logarithmic

In a shell and tube heat exchanger, the shell side fluid velocity can‟t be changed by changing the_________________?

A Tube layout

B Tube diameter

C Tube pitch

D Number of baffles

Review Detailed Answer

Correct Answer: Tube diameter

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

Prandtl number for most of dry gases is about________________?

Extremely large or small volumes of fluids are generally best routed through the shell side of a shell and tube heat exchanger, because of the________________?

The purpose of providing expansion bellows in the shell of tubular exchanger is to _____________________?

Multipass heat exchangers are used______________________?

It is not recommended to use a 1-2 shell and tube heat exchanger for a particular heat duty, whenever the LMTD correction factor is___________________?

Finned tube heat exchangers__________________?

Fruit juice (a heat sensitive material) can be concentrated in a ____________ evaporator?

The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re0.8, where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient varies with the pipe diameter D. as _________________?

For heat flow through very thick walled cylinder, use ___________mean radius?

In a shell and tube heat exchanger, the shell side fluid velocity can‟t be changed by changing the_________________?