Chemical Engineering Archives

Chemical Engineering

Prepare with the best Chemical Engineering MCQs with answers and detailed explanations for exams and job tests. Our collection covers key topics such as chemical process calculations, thermodynamics, fluid mechanics, heat transfer, mass transfer, reaction engineering, instrumentation, and plant design. These Chemical Engineering multiple-choice questions are ideal for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, PEC exams, GATE, university entry tests, and job interviews. Practice online with updated Chemical Engineering MCQs to strengthen your concepts and improve technical problem-solving skills.

1591. Bulk of the convective heat transfer resistance from a hot tube surface to the fluid flowing in it, is

In the central core of the fluid

Uniformly distributed throughout the fluid

Mainly confined to a thin film of fluid near the surface

None of these

✅ The correct answer is option C.

1592. ‘Duhring’s plot’ is of use in

Extractive distillation

Evaporation

Leaching

Absorption

✅ The correct answer is option B.

1593. The ratio of momentum diffusivity to thermal diffusivity is the __________ number.

Prandtl

Nusselt

Stanton

Grashoff

✅ The correct answer is option A.

1594. Leidenfrost point is a term concerned with the

Condensation of the saturated vapor on a cold surface

Concentration of a corrosive solution by evaporation

Heat transfer between two highly viscous liquids

Boiling of a liquid on a hot surface

✅ The correct answer is option D.

1595. For the same heat load and mass flow rate in the tube side of a shell and tube heat exchanger, one may use multipass on the tube side, because it

Decreases the pressure drop

Decreases the outlet temperature of cooling medium

Increases the overall heat transfer coefficient

None of these

✅ The correct answer is option C.

1596. The sum of reflectivity and absorptivity for an opaque body is equal to

0.5

✅ The correct answer is option B.

1597. Dietus-Boelter equation used for the determination of heat transfer co-efficient is valid

For fluids in laminar flow

For fluids in tubulent flow

When Grashhoff number is very important

For liquid metals

✅ The correct answer is option B.

1598. At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe?

0.5

< 0.5

> 0.6

< 0.1

✅ The correct answer is option C.

1599. Which of the following is the most controlling factor for the rate of bubble detachment from the hot solid surface?

Liquid density

Liquid viscosity

Hot surface temperature

Interfacial tension

✅ The correct answer is option D.

1600. Among liquids, water has a comparatively high value of thermal conductivity, due to its

Low density

High viscosity

Partial ionisation

Dense structure

✅ The correct answer is option C.