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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.

Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then_________________?

A U1 = U2

B U2 > U1

C U1 > U2

D U1 = dirt factor – U2

Review Detailed Answer

Correct Answer: U1 = U2

Maximum heat transfer rate is achieved in _____________ flow?

A Co-current

B Counter-current

C Turbulent

D Laminar

Review Detailed Answer

Correct Answer: Turbulent

Radiator of an automobile engine is a ______________ type of heat exchanger?

A Co-current

B Cross-current

C Counter-current

D Direct contact

Review Detailed Answer

Correct Answer: Direct contact

In forced convection, the Nusselt number is a function of ____________________?

A Re and Pr

B Re and Gr

C Pr and Gr

D Re and Sc

Review Detailed Answer

Correct Answer: Re and Pr

In a shell and tube type heat exchanger, the floating tube bundle heat arrangement is used________________?

A In low range of temperature differences

B In high range of temperature differences

C Because of its low cost

D To prevent corrosion of the tube bundles

Review Detailed Answer

Correct Answer: In high range of temperature differences

The Stefan-Boltzmann constant depends on the_________________?

A Medium

B Temperature

C Surface

D None of these

Review Detailed Answer

Correct Answer: None of these

For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it________________?

A Occupies smaller space

B Is more economical

C Is easy to operate and maintain

D All A., B. and C.

Review Detailed Answer

Correct Answer: All A., B. and C.

A body cools down from 75°C to 70°C in 10 minutes. It will cool down from 70° C to 65° C in ______________ minutes?

A 10

B > 10

C < 10

D Either B. or C., depends on the mass of the body

Review Detailed Answer

Correct Answer: 10

Colburn analogy is applicable for the value of Prandtl number from_________________?

A 0.001 to 1

B 0.6 to 120

C 0.5 to 5

D 120 to 400

Review Detailed Answer

Correct Answer: 0.6 to 120

For what value of Prandtl number, the Col-burn analogy is valid ?

A 0.06 to 120

B 0.6 to 120

C 1 to 103

D 1 to 50

Review Detailed Answer

Correct Answer: 0.6 to 120

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then_________________?

Maximum heat transfer rate is achieved in _____________ flow?

Radiator of an automobile engine is a ______________ type of heat exchanger?

In forced convection, the Nusselt number is a function of ____________________?

In a shell and tube type heat exchanger, the floating tube bundle heat arrangement is used________________?

The Stefan-Boltzmann constant depends on the_________________?

For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it________________?

A body cools down from 75°C to 70°C in 10 minutes. It will cool down from 70° C to 65° C in ______________ minutes?

Colburn analogy is applicable for the value of Prandtl number from_________________?

For what value of Prandtl number, the Col-burn analogy is valid ?