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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.

The most conducive surface for dropwise condensation to occur is the _____________ surface?

A Coated

B Oily

C Glazed & polished

D Smooth

Review Detailed Answer

Correct Answer: Oily

Out of 100 kcal/second of incident radiant energy on the surface of a thermally transparent body, 300 kcal/second is reflected back. If the transmissivity of the body is 0.25, the emissivity of the surface will be_________________?

A 0.35

B 0.45

C 0.55

D 0.85

Review Detailed Answer

Correct Answer: 0.45

The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h0 = heat transfer coefficient at the outer surface) ?

A K/h0

B 2K/h0

C h0/K

D h0/2K

Review Detailed Answer

Correct Answer: K/h0

Analogy between mass and heat transfer is not applicable in case of____________________?

A Same velocity profile or equal eddy diffusivities

B Thermal or pressure mass diffusion

C Viscous heating or chemical reaction

D Both B. and C.

Review Detailed Answer

Correct Answer: Both B. and C.

An evaporator while concentrating an aqueous solution from 10 to 40% solids evaporates 30000 kg of water. The amount of solids handled by the system in kg is___________________?

A 4000

B 9000

C 4600

D 3000

Review Detailed Answer

Correct Answer: 4000

Steady state one dimensional heat flow by conduction as given by Fourier’s low does not assume that_______________?

A There is no internal heat generation

B Boundary surfaces are isothermal

C Material is anisotropic

D Constant temperature gradient exists

Review Detailed Answer

Correct Answer: Material is anisotropic

Heat transfer co-efficient (h1) for liquids increases with__________________?

A Increasing temperature

B Decreasing temperature

C Decreasing Reynolds number

D None of these

Review Detailed Answer

Correct Answer: Increasing temperature

Multiple effect evaporators ar used to___________________?

A Increase the steam economy & decrease the capacity

B Increase the steam economy & the capacity

C Decrease the steam economy & the capacity

D Decrease the steam economy & increase the capacity

Review Detailed Answer

Correct Answer: Increase the steam economy & the capacity

In natural convection heat transfer, the correlating parameter is the_______________________?

A Graetz number

B Eckert number

C Grashoff number

D Bond number

Review Detailed Answer

Correct Answer: Grashoff number

Correction is applied to LMTD for __________ flow?

A Parallel

B Counter

C Cross

D None of these

Review Detailed Answer

Correct Answer: Cross

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

The most conducive surface for dropwise condensation to occur is the _____________ surface?

Out of 100 kcal/second of incident radiant energy on the surface of a thermally transparent body, 300 kcal/second is reflected back. If the transmissivity of the body is 0.25, the emissivity of the surface will be_________________?

The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h0 = heat transfer coefficient at the outer surface) ?

Analogy between mass and heat transfer is not applicable in case of____________________?

An evaporator while concentrating an aqueous solution from 10 to 40% solids evaporates 30000 kg of water. The amount of solids handled by the system in kg is___________________?

Steady state one dimensional heat flow by conduction as given by Fourier’s low does not assume that_______________?

Heat transfer co-efficient (h1) for liquids increases with__________________?

Multiple effect evaporators ar used to___________________?

In natural convection heat transfer, the correlating parameter is the_______________________?

Correction is applied to LMTD for __________ flow?