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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.

Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is________________?

A Finned tube heat exchanger with air inside and steam outside

B Finned tube heat exchanger with air outside and steam inside

C Shell and tube heat exchanger with air inside tubes and steam on shell side

D Shell and tube heat exchanger with air on shell side and steam inside tubes

Review Detailed Answer

Correct Answer: Finned tube heat exchanger with air outside and steam inside

Heat exchanger tubes are never made of_________________?

A Plain carbon steel

B Stainless steel

C Lead

D Copper

Review Detailed Answer

Correct Answer: Lead

The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K0 + at, where, K is the thermal conductivity and T is the temperature (in °K). The units of ‘a’ in SI system will be________________?

A W/m.k

B W/m

C W/m.k2

D None, ‘a’ is just a number

Review Detailed Answer

Correct Answer: W/m.k

When vaporisation takes place directly at the heating surface, it is called________________?

A Film boiling

B Nucleate boiling

C Vapour binding

D None of these

Review Detailed Answer

Correct Answer: Nucleate boiling

Thermal conductivity of a conducting solid material depends upon its_______________?

A Temperature

B Porosity

C Both A. & B.

D Neither A. nor B.

Review Detailed Answer

Correct Answer: Both A. & B.

Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the________________?

A Surrounding temperature

B Average temperature of the fin

C Temperature of the fin end

D Constant temperature equal to that of the base

Review Detailed Answer

Correct Answer: Constant temperature equal to that of the base

The actual temperature drop across the heating surface in an evaporator depends on the_________________?

A Feed

B Depth of liquid over heating surface

C Pressure difference between steam chest and vapour space

D All A., B. and C.

Review Detailed Answer

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

Heat flux is the time rate of heat transfer per unit_______________?

A Length

B Area

C Volume

D None of these

Review Detailed Answer

Correct Answer: Area

The steam ejector is used to__________________?

A Remove condensate from the steam pipelines

B Create vacuum

C Superheat the steam

D None of these

Review Detailed Answer

Correct Answer: Create vacuum

Steam is to be condensed in a shell and tube heat exchanger, 5 m long with a shell diameter of 1 m. Cooling water is to be used for removing the heat. Heat transfer co-efficient for the cooling water, whether on shell side or tube side is the same. The best arrangement is_____________?

A Vertical heat exchanger with steam on tube side

B Vertical heat exchanger with steam on shell side

C Horizontal heat exchanger with steam on tube side

D Horizontal heat exchanger with steam on shell side

Review Detailed Answer

Correct Answer: Vertical heat exchanger with steam on shell side

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is________________?

Heat exchanger tubes are never made of_________________?

The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K0 + at, where, K is the thermal conductivity and T is the temperature (in °K). The units of ‘a’ in SI system will be________________?

When vaporisation takes place directly at the heating surface, it is called________________?

Thermal conductivity of a conducting solid material depends upon its_______________?

Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the________________?

The actual temperature drop across the heating surface in an evaporator depends on the_________________?

Heat flux is the time rate of heat transfer per unit_______________?

The steam ejector is used to__________________?

Steam is to be condensed in a shell and tube heat exchanger, 5 m long with a shell diameter of 1 m. Cooling water is to be used for removing the heat. Heat transfer co-efficient for the cooling water, whether on shell side or tube side is the same. The best arrangement is_____________?