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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.

Indirect contact heat exchangers are preferred over direct contact heat exchangers, because_________________?

A Heat transfer co-efficient are high

B There is no risk of contamination

C There is no mist formation

D Cost of equipment is lower

Review Detailed Answer

Correct Answer: There is no risk of contamination

Which of the following has the lowest overall heat transfer co-efficient ?

A Dowtherm

B Molten sodium

C Water

D Air

Review Detailed Answer

Correct Answer: Air

Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator ?

A Long vertical evaporator

B Horizontal tube evaporator

C Agitated film evaporator

D Calandria vertical tube evaporator

Review Detailed Answer

Correct Answer: Agitated film evaporator

The absorptivity of a grey body at a given temperature _____________ with increasing wavelength of radiation?

A Increases

B Decreases

C Remain constant

D May increase or decrease; depends on the material

Review Detailed Answer

Correct Answer: May increase or decrease; depends on the material

In case of heat transfer by conduction in a hollow cylinder, ______________ mean area is used to calculate the heat transfer rate?

A Geometric

B Arithmetic

C Logarithmic

D Either A., B. or C.

Review Detailed Answer

Correct Answer: Logarithmic

The characteristic dimensionless groups for heat transfer to a fluid flowing through a pipe in laminar flow are_______________?

A Re.Gz

B Nu, Pr

C Nu, Pr, Re

D Nu, Gz

Review Detailed Answer

Correct Answer: Nu, Gz

One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to________________?

A Heat the water from 0°C to 100°C

B Evaporate the water

C To superheat the steam

D Data insufficient, can’t be predicted

Review Detailed Answer

Correct Answer: Evaporate the water

A sphere of radius ‘R1’ is enclosed in a sphere of radius ‘R2’. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is ________________?

A 0

B R2/(R1+R2)

C 1

D (R1/R2)2

Review Detailed Answer

Correct Answer: R2/(R1+R2)

Solid angle subtended by the finite surface at the radiating element is_________________?

A Called the view factor

B Called the angle of vision

C Proportional to the square of the distance between surfaces

D Expressed in terms of radians

Review Detailed Answer

Correct Answer: Called the angle of vision

Corrosiveness of steam condensate is due to the presence of________________?

A CO2

B Dissolved O2

C Both A. & B.

D Neither A. nor B.

Review Detailed Answer

Correct Answer: Both A. & B.

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

Indirect contact heat exchangers are preferred over direct contact heat exchangers, because_________________?

Which of the following has the lowest overall heat transfer co-efficient ?

Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator ?

The absorptivity of a grey body at a given temperature _____________ with increasing wavelength of radiation?

In case of heat transfer by conduction in a hollow cylinder, ______________ mean area is used to calculate the heat transfer rate?

The characteristic dimensionless groups for heat transfer to a fluid flowing through a pipe in laminar flow are_______________?

One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to________________?

A sphere of radius ‘R1’ is enclosed in a sphere of radius ‘R2’. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is ________________?

Solid angle subtended by the finite surface at the radiating element is_________________?

Corrosiveness of steam condensate is due to the presence of________________?