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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 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

The thermal efficiency of a reversible heat engine operating between two given thermal reservoirs is 0.4. The device is used either as a refrigerator or as a heat pump between the same reservoirs. Then the coefficient of performance as a refrigerator (COP)R and the co-efficient of performance as a heat pump (COP)HP are _______________?

A (COP)R = (COP)HP = 0.6

B (COP)R = 2.5; (COP)HP = 1.5

C (COP)R = 1.5; (COP)HP = 2.5

D (COP)R = (COP)HP = 2.5

Review Detailed Answer

Correct Answer: (COP)R = 1.5; (COP)HP = 2.5

Heat transfer rate per unit area is called_________________?

A Thermal conductivity

B Heat flux

C Heat transfer co-efficient

D Thermal diffusivity

Review Detailed Answer

Correct Answer: Heat flux

Tube pitch is the _______________ of tube diameters and the clearances?

A Sum

B Difference

C Ratio

D None of these

Review Detailed Answer

Correct Answer: Sum

A black body when hot, emits heat radiation of _____________ wavelengths?

A Small

B Large

C All

D One fixed

Review Detailed Answer

Correct Answer: All

With increase in temperature, the thermal conductivity of non-metallic amorphous solids_________________?

A Decreases

B Increases

C Remain constant

D First decreases upto certain temperature and then increases

Review Detailed Answer

Correct Answer: Increases

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

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 ?

Heat transfer rate per unit area is called_________________?

Tube pitch is the _______________ of tube diameters and the clearances?

A black body when hot, emits heat radiation of _____________ wavelengths?

With increase in temperature, the thermal conductivity of non-metallic amorphous solids_________________?