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.

1651. Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by

Keeping the heat transfer surface clean

Enhancing the fluid pumping rate

Increasing the tube length

None of these

✅ The correct answer is option A.

1652. With increase in temperature, the thermal conductivity of most liquids

Increases

Decreases

Remains same

First increases upto a certain temperature and then becomes constant

✅ The correct answer is option B.

1653. A concentric double pipe heat exchanger as compared to the shell and tube heat exchanger for the same heat load requires

Less heating surface

More space

Lower maintenance cost

None of these

✅ The correct answer is option B.

1654. Heat flux through several resistances in series in analogous to the current flowing through several

Resistances in parallel

Capacitors in series

Resistances in series

None of these

✅ The correct answer is option C.

1655. A body is called grey if the monochromatic emissivity of the body is

Zero

Unity

Same for all wavelengths

Different for all wavelengths

✅ The correct answer is option C.

1656. The equation, (NSt x N2/3Pr) = f/2, is the __________ analogy.

Colburn

Reynolds

Prandtl

None of these

✅ The correct answer is option A.

1657. For condensation of pure vapors, if the heat transfer co-efficients in filmwise and drop-wise condensation are respectively hf and hd, then

hf = hd

hf > hd

hf < hd

hf could be greater or smaller than hd

✅ The correct answer is option C.

1658. An equipment which converts the latent or sensible heat of one fluid into the latent heat of vaporisation of another, is called a

Boiler

Heat exchanger

Recuperator

Regenerator

✅ The correct answer is option B.

1659. Thermal conductivity of a gas at low density, __________ with increase in temperature.

Decreases

Increases

Remains unchanged

May increase or decrease; depends on the gas

✅ The correct answer is option B.

1660. The equation, Nst = f/2, is the __________ analogy.

Colburn

Reynolds

Prandtl

None of these

✅ The correct answer is option B.