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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.

Nusselt number is the ratio of the temperature gradient at the wall to_________________?

A Temperature difference

B Heat flux

C That across the entire pipe

D None of these

Review Detailed Answer

Correct Answer: That across the entire pipe

What is the unit of thermal conductivity ?

A Kcal/hr. m2 °C

B Kcal/hr.m.°C

C Kcal/hr.m

D Kcal/hr. °C

Review Detailed Answer

Correct Answer: Kcal/hr.m.°C

Tubes are held between top and bottom tube sheets in Calandria type evaporator by keeping_________________?

A Both the tube sheets fixed

B Both the tube sheets floating

C The top tube sheet floating and bottom tube sheet fixed

D The top tube sheet fixed and the bottom tube-sheet floating

Review Detailed Answer

Correct Answer: Both the tube sheets fixed

What is the emissivity of a black body ?

A 0

B 1

C 0.5

D 0.90

Review Detailed Answer

Correct Answer: 1

In SI units, thermal conductivity is expressed in__________________?

A Watt/m.°K

B Watt/m2. °K

C Watt/m2. °K

D Watt/m4. °K

Review Detailed Answer

Correct Answer: Watt/m.°K

In pipe flow, heat is transferred from hot wall to the liquid by__________________?

A Conduction only

B Forced convection only

C Forced convection and conduction

D Free and forced convection

Review Detailed Answer

Correct Answer: Forced convection and conduction

Heat transfer rate described by Fourier’s law will decrease, if the _____________ increases?

A Thermal conductivity

B Thickness

C Temperature difference

D Heat transfer area

Review Detailed Answer

Correct Answer: Thickness

In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will___________________?

A Increase

B Decrease

C Remain unchanged

D Either increase or decrease; depends on the coolant flow rate

Review Detailed Answer

Correct Answer: Remain unchanged

Which one gives the monochromatic emissive power for black body radiation ?

A Planck’s law

B Kirchhoff’s law

C Wien’s law

D Stefan-Boltzmann law

Review Detailed Answer

Correct Answer: Planck’s law

Absorptivity and reflectivity of a perfect black body are respectively _______________?

A 1 and 0

B 0 and 1

C 1 and ∞

D 0 and 0.5

Review Detailed Answer

Correct Answer: 1 and 0

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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All Topics 9594

Nusselt number is the ratio of the temperature gradient at the wall to_________________?

What is the unit of thermal conductivity ?

Tubes are held between top and bottom tube sheets in Calandria type evaporator by keeping_________________?

What is the emissivity of a black body ?

In SI units, thermal conductivity is expressed in__________________?

In pipe flow, heat is transferred from hot wall to the liquid by__________________?

Heat transfer rate described by Fourier’s law will decrease, if the _____________ increases?

In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will___________________?

Which one gives the monochromatic emissive power for black body radiation ?

Absorptivity and reflectivity of a perfect black body are respectively _______________?