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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.

Steam trap is used to_________________?

A Condense the steam flowing in the pipeline

B Remove water resulting from partial condensation of steam

C Stop the supply of steam

D None of these

Review Detailed Answer

Correct Answer: Remove water resulting from partial condensation of steam

LMTD for counter-flow and parallel flow heat exchanger will be the same, when the_________________?

A Cold fluid is heated to a certain temperature by condensing steam (isothermal fluid)

B Outlet temperature of both the hot and cold fluid are same

C Outlet temperature of hot fluid is less than the outlet temperature of the cold fluid

D None of these

Review Detailed Answer

Correct Answer: Cold fluid is heated to a certain temperature by condensing steam (isothermal fluid)

Which of the following parameters of the fluid is not very important, while deciding its route in a shell and tube heat exchanger ?

A Corrosiveness & fouling characteristics

B Pressure

C Viscosity

D Density

Review Detailed Answer

Correct Answer: Density

It is desired to concentrate a 20% salt solution (20 kg of salt in 100 kg of solution) to a 30% salt solution in an evaporator. Consider a feed of 300 kg/min at 30°C. The boiling point of the solution is 110°C, the latent heat of vaporisation is 2100 kJ/kg and the specific heat of the solution is 4 kJ/kg.K. The rate at which the heat has to be supplied in (kJ/min) to the evaporator is____________________?

A 3.06 × 105

B 6.12 × 105

C 7.24 × 105

D 9.08 × 105

Review Detailed Answer

Correct Answer: 3.06 × 105

Fqra cold viscous feed, backward feed gives _____________ than forward feed?

A A higher capacity

B A lower capacity

C Lower economy

D None of these

Review Detailed Answer

Correct Answer: A higher capacity

The Graetz number is concerned with the___________________

A Mass transfer between a gas and a liquid

B Absorption with chemical reaction

C Heat transfer in turbulent flow

D Heat transfer in laminar flow

Review Detailed Answer

Correct Answer: Heat transfer in laminar flow

The unit of conductance in SI unit is_______________?

A W/m

B W/m2

C W/°K

D W/m°K

Review Detailed Answer

Correct Answer: W/°K

Which of the following has the lowest Prandtl number ?

A Molten sodium (a coolant used in fast breeder reactor)

B Water

C Transformer oil

D Dilute H2SO4

Review Detailed Answer

Correct Answer: Molten sodium (a coolant used in fast breeder reactor)

In case of a multipass shell and tube heat exchanger, the temperature drop in the fluid _______________?

A Is inversely proportional to the resistance across which the drop occurs

B And the wall are proportional to individual resistances

C And the wall is not related

D None of these

Review Detailed Answer

Correct Answer: And the wall are proportional to individual resistances

The capacity of double-effect evaporator is less than half of the capacity of two single effects, each of which is operating over same terminal temperature difference, when the________________ ?

A Solution has an elevation of boiling point

B Evaporators operate under vacuum

C Evaporators operate at atmospheric pressure

D None of these

Review Detailed Answer

Correct Answer: Solution has an elevation of boiling point

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

Steam trap is used to_________________?

LMTD for counter-flow and parallel flow heat exchanger will be the same, when the_________________?

Which of the following parameters of the fluid is not very important, while deciding its route in a shell and tube heat exchanger ?

Fqra cold viscous feed, backward feed gives _____________ than forward feed?

The Graetz number is concerned with the___________________

The unit of conductance in SI unit is_______________?

Which of the following has the lowest Prandtl number ?

In case of a multipass shell and tube heat exchanger, the temperature drop in the fluid _______________?

The capacity of double-effect evaporator is less than half of the capacity of two single effects, each of which is operating over same terminal temperature difference, when the________________ ?