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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.

For an ideal black body______________________?

A Absorptivity = 1

B Reflectivity = 1

C Emissivity = 0

D Transmissivity = 1

Review Detailed Answer

Correct Answer: Absorptivity = 1

For concentrating an aqueous solution of a material like anhydrous Na2SO4, whose solubility decreases with rise in temperature, the most suitable evaporator is a _______________ evaporator?

A High pressure

B Vacuum

C Backward feed

D None of these

Review Detailed Answer

Correct Answer: Vacuum

Steam consumption in kg/hr in case of an evaporator is given by (where, C & E are capacity the economy of the evaporator respectively) ?

A C/E

B E/C

C CE

D 1/CE

Review Detailed Answer

Correct Answer: C/E

Dittus-Boelter equation cannot be used for molten metals mainly due to its very low_____________________?

A Prandtl number

B Grashoff number

C Thermal conductivity

D Viscosity

Review Detailed Answer

Correct Answer: Prandtl number

The heat flux (from outside to inside) across an insulating wall with thermal conductivity, K = 0.04 W/m.°K and thickness 0.16m is 10 W/m2. The temperature of the inside wall is – 5°C. The outside wall temperature is___________________?

A 25°C

B 30°C

C 35°C

D 40°C

Review Detailed Answer

Correct Answer: 35°C

In a multipass shell and tube heat exchanger, tube side return pressure loss is equal to _____________ the velocity head?

A Twice

B Four times

C Square root of

D Square of

Review Detailed Answer

Correct Answer: Four times

Heat produced when a steady state current, I passes through an electrical conductor having resistance, ‘R’ is___________________?

A IR

B I2R

C IR2

D I2R2

Review Detailed Answer

Correct Answer: I2R

The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by__________________?

A Painting the surface black

B Painting the surface white (with aluminium paint)

C Giving the surface a mirror finish

D Roughening the surface

Review Detailed Answer

Correct Answer: Painting the surface white (with aluminium paint)

Fourier’s law applies to the heat transfer by__________________?

A Convection

B Radiation

C Conduction

D All A., B. & C.

Review Detailed Answer

Correct Answer: Conduction

As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________?

A Temperature of the body only

B Wavelength of monochromatic radiation

C Both A. and B.

D Nature of material of body

Review Detailed Answer

Correct Answer: Temperature of the body only

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

For an ideal black body______________________?

For concentrating an aqueous solution of a material like anhydrous Na2SO4, whose solubility decreases with rise in temperature, the most suitable evaporator is a _______________ evaporator?

Steam consumption in kg/hr in case of an evaporator is given by (where, C & E are capacity the economy of the evaporator respectively) ?

Dittus-Boelter equation cannot be used for molten metals mainly due to its very low_____________________?

The heat flux (from outside to inside) across an insulating wall with thermal conductivity, K = 0.04 W/m.°K and thickness 0.16m is 10 W/m2. The temperature of the inside wall is – 5°C. The outside wall temperature is___________________?

In a multipass shell and tube heat exchanger, tube side return pressure loss is equal to _____________ the velocity head?

Heat produced when a steady state current, I passes through an electrical conductor having resistance, ‘R’ is___________________?

The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by__________________?

Fourier’s law applies to the heat transfer by__________________?

As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________?