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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 thermal radiation emitted by a body is proportional to Tn, where T is its absolute temperature. The value of ‘n’ is exactly 4 for__________________?

A Black painted bodies only

B All bodies

C Polished bodies only

D A black body

Review Detailed Answer

Correct Answer: All bodies

Evaporation by thermo compression results in the _________________________?

A Saving of steam

B Realisation of multiple effect economy in a single effect

C Both A. and B.

D None of these

Review Detailed Answer

Correct Answer: Both A. and B.

Use of transverse baffles in a shell and tube heat exchanger is done to increase the___________________?

A Rate of heat transfer

B Flow velocity

C Turbulence of shell side fluid

D All A., B. and C.

Review Detailed Answer

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

Which of the following situations can be approximated to a steady state heat transfer system ?

A A red hot steel slab (having outside surface temperature as 1300°C) exposed to the

B 10 kg of dry saturated steam at 8 kgf/cm2 flowing through a short length of stainless steel pipe

C Boiling brine kept in open vessel when the bottom surface temperature of the vessel is

D A sub-cooled refrigerant liquid at 8°C flowing at the rate of 6 Kg/minute through a copper

Review Detailed Answer

Correct Answer: 10 kg of dry saturated steam at 8 kgf/cm2 flowing through a short length of stainless steel pipe

Heat transfer by ____________ may not necessarily require the presence of a medium?

A Conduction

B Natural convection

C Forced convection

D Radiation

Review Detailed Answer

Correct Answer: Radiation

Nusselt number is the ratio of the ____________________?

A Temperature gradient of the wall to that across the entire pipe

B Temperature difference to the temperature gradient at the wall

C Heat flux at the wall to that across the entire pipe

D None of these

Review Detailed Answer

Correct Answer: Heat flux at the wall to that across the entire pipe

Prandtl number is the reciprocal of____________________?

A Thermal diffusivity/Momentum diffusivity

B Thermal diffusivity × Momentum

C Thermal diffusivity × Mass diffusivity

D Mass diffusivity × Momentum diffusivity

Review Detailed Answer

Correct Answer: Thermal diffusivity/Momentum diffusivity

For a multipass shell and tube heat exchanger, the LMTD correction factor is always________________?

A 1

B > 1

C < 1

D Between 1 & 2

Review Detailed Answer

Correct Answer: 1

Thermal conductivity of a gas at low density, ___________ with increase in temperature ?

A Decreases

B Increases

C Remains unchanged

D May increase or decrease; depends on the gas

Review Detailed Answer

Correct Answer: Increases

The interchange factor for radiation heat transfer from surface ‘x’ to surface ‘y’ in case of an infinite parallel planes with emissivities εx & εy is given by_______________?

A εx + εy

B εx . εy

C 1/εx + 1/εy

D (εx + εy)/( εx + εy – εx . εy)

Review Detailed Answer

Correct Answer: εx + εy

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

The thermal radiation emitted by a body is proportional to Tn, where T is its absolute temperature. The value of ‘n’ is exactly 4 for__________________?

Evaporation by thermo compression results in the _________________________?

Use of transverse baffles in a shell and tube heat exchanger is done to increase the___________________?

Which of the following situations can be approximated to a steady state heat transfer system ?

Heat transfer by ____________ may not necessarily require the presence of a medium?

Nusselt number is the ratio of the ____________________?

Prandtl number is the reciprocal of____________________?

For a multipass shell and tube heat exchanger, the LMTD correction factor is always________________?

Thermal conductivity of a gas at low density, ___________ with increase in temperature ?

The interchange factor for radiation heat transfer from surface ‘x’ to surface ‘y’ in case of an infinite parallel planes with emissivities εx & εy is given by_______________?