MCQsDrive | MCQsDrive

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.

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

With increase in temperature, the thermal conductivity of a gas ___________________?

A Increases

B Decreases

C Remain same

D May increase or decrease depending on the type of gas

Review Detailed Answer

Correct Answer: Increases

Which area is used in case of heat flow by conduction through a cylinder ?

A Logarithmic mean area

B Arithmetic mean area

C Geometric mean area

D None of these

Review Detailed Answer

Correct Answer: Logarithmic mean area

The rate of emission of radiation by a body does not depend upon the__________________?

A Wavelength of radiation

B Surface temperature of the body

C Nature of the surface

D Shape and porosity of the body

Review Detailed Answer

Correct Answer: Shape and porosity of the body

In a cooling tower, water becomes cool by________________?

A Loosing sensible heat

B Heat transfer to surroundings

C Vaporisation due to heat loss to air

D Loosing latent heat

Review Detailed Answer

Correct Answer: Loosing sensible heat

Out of the following four assumptions used in the derivation of the equation for LMTD [LMTD = (Δt1 – Δt2)/ln(Δt1/Δt2)], which one is subject to the largest deviation in practice ?

A Constant overall heat transfer co-efficient.

B Constant rate of fluid flow

C Constant specific heat

D No partial phase change in the system

Review Detailed Answer

Correct Answer: Constant rate of fluid flow

Showing 191 to 200 of 510 results

Contact Info

Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

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_______________?

With increase in temperature, the thermal conductivity of a gas ___________________?

Which area is used in case of heat flow by conduction through a cylinder ?

The rate of emission of radiation by a body does not depend upon the__________________?

In a cooling tower, water becomes cool by________________?

Out of the following four assumptions used in the derivation of the equation for LMTD [LMTD = (Δt1 – Δt2)/ln(Δt1/Δt2)], which one is subject to the largest deviation in practice ?