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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.

Crystal size in a continuous crystalliser depends upon the___________________?

A Rate of heat transfer

B Degree of turbulence

C Degree of super-saturation

D All A., B. and C

Review Detailed Answer

Correct Answer: All A., B. and C

Boiling of milk in an open vessel is an example of ______________ boiling?

A Film

B Sub-cooled

C Saturated nucleate

D None of these

Review Detailed Answer

Correct Answer: Film

Black liquor generated during paper manufacture is concentrated in a___________________?

A Single effect evaporator

B Single effect evaporator followed by a crystalliser

C Multiple effect evaporator

D Multiple effect evaporators followed by a crystalliser

Review Detailed Answer

Correct Answer: Multiple effect evaporator

What is Nusselt number ?

A CP. μ/k

B hD/k

C h. CP/μ

D CP. μ/h

Review Detailed Answer

Correct Answer: hD/k

In the equation Q = UAΔt; Δt is_________________________?

A Geometric mean temperature difference

B Arithmetic mean temperature difference

C Logarithmic mean temperature difference

D The difference of average bulk temperatures of hot and cold fluids

Review Detailed Answer

Correct Answer: Logarithmic mean temperature difference

For a cold dilute feed to produce thick viscous liquor, backward feeding as compared to forward feeding results in_____________________?

A Increased economy

B Decreased economy

C Lower capacity

D No effect on economy

Review Detailed Answer

Correct Answer: Increased economy

Hot water (0.01 m3 /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m3/min) of density 800 kg/m3 and specific heat of 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately ?

A 32

B 37

C 45

D 50

Review Detailed Answer

Correct Answer: 32

Graetz number is given by__________________?

A mCp/kL

B kL/mCp

C mCp/kμ

D kμ/mCp

Review Detailed Answer

Correct Answer: mCp/kL

Reynold’s analogy states that_________________?

A Nst α f

B Nst α NRe

C NNu α f

D NRe α f

Review Detailed Answer

Correct Answer: Nst α f

Which of the following has the minimum thermal conductivity ?

A Nitrogen

B Steel

C Carbon black

D Tar

Review Detailed Answer

Correct Answer: Nitrogen

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

Crystal size in a continuous crystalliser depends upon the___________________?

Boiling of milk in an open vessel is an example of ______________ boiling?

Black liquor generated during paper manufacture is concentrated in a___________________?

What is Nusselt number ?

In the equation Q = UAΔt; Δt is_________________________?

For a cold dilute feed to produce thick viscous liquor, backward feeding as compared to forward feeding results in_____________________?

Hot water (0.01 m3 /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m3/min) of density 800 kg/m3 and specific heat of 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately ?

Graetz number is given by__________________?

Reynold’s analogy states that_________________?

Which of the following has the minimum thermal conductivity ?