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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.

Grashoff number is given by________________?

A gD3.β.Δtρ2/μ2

B gD2βΔtρ/μ2

C gD2βΔtP2μ

D gD3βΔtP2/μ

Review Detailed Answer

Correct Answer: gD3.β.Δtρ2/μ2

If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows _____________ law?

A Parabolic

B Hyperbolic

C Linear

D Logarithmic

Review Detailed Answer

Correct Answer: Parabolic

Which of the following is the most widely used heat insulating material for pipelines carrying steam ?

A Tar dolomite bricks followed by asbestos

B Fireclay refractory followed by aluminium sheet

C Cotton followed by aluminium foil

D 85% magnesia cement and glass wool

Review Detailed Answer

Correct Answer: 85% magnesia cement and glass wool

Evaporator tubes are generally_____________________?

A Horizontal

B Vertical

C Inclined

D Random

Review Detailed Answer

Correct Answer: Vertical

In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is _____________ the outlet temperature of the cold fluid?

A Equal to

B More than

C Less than

D Either more or less than (depending upon the fluid)

Review Detailed Answer

Correct Answer: Equal to

Critical value of the _____________ number governs the transition from laminar to turbulent flow in free convection heat transfer?

A Grashoff

B Reynolds

C Both ‘a’ & ‘b’

D Prandtl & Grashoff

Review Detailed Answer

Correct Answer: Grashoff

Fluid motion in the natural convection heat transfer between a solid surface and a fluid in contact with it, results from the_________________?

A Existence of thermal boundary layer

B Temperature gradient produced due to density difference

C Buoyancy of the bubbles produced at active nucleation site

D None of these

Review Detailed Answer

Correct Answer: None of these

Reason for operating an evaporator in multiple effects is to secure ___________________?

A Increased steam economy

B Decreased steam consumption

C Both A. and B.

D Increased capacity

Review Detailed Answer

Correct Answer: Both A. and B.

All analogy equations connecting friction factor and heat transfer co-efficient apply only to ___________________?

A Wall or skin friction

B Form friction

C Both A. and B.

D Turbulent flow

Review Detailed Answer

Correct Answer: Wall or skin friction

Fouling factor for a heat exchanger is given by (where, U1 = heat transfer co-efficient of dirty surface U2 = heat transfer co-efficient of clean surface) ?

A U1 – U2

B 1/U1 – 1/U2

C 1/U2 – 1/U1

D U2 – U1

Review Detailed Answer

Correct Answer: 1/U1 – 1/U2

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

Grashoff number is given by________________?

If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows _____________ law?

Which of the following is the most widely used heat insulating material for pipelines carrying steam ?

Evaporator tubes are generally_____________________?

In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is _____________ the outlet temperature of the cold fluid?

Critical value of the _____________ number governs the transition from laminar to turbulent flow in free convection heat transfer?

Fluid motion in the natural convection heat transfer between a solid surface and a fluid in contact with it, results from the_________________?

Reason for operating an evaporator in multiple effects is to secure ___________________?

All analogy equations connecting friction factor and heat transfer co-efficient apply only to ___________________?

Fouling factor for a heat exchanger is given by (where, U1 = heat transfer co-efficient of dirty surface U2 = heat transfer co-efficient of clean surface) ?