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.

6041. The vent valve provided in a liquid handling centrifugal pump is

Generally a needle valve

Used to release any gases that might be vapour locking the pump

Helpful in easy removal of samples

All of the above

✅ The correct answer is option D.

6042. Rubber latex is an example of a __________ .fluid.

Pseudoplastic

Bingham plastic

Dilatent

Newtonion

✅ The correct answer is option A.

6043. A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, τ₀ = 10 KPa, is shared between flat parallel plates separated by a distance of 10⁻³ m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is

10 KPa

20 KPa

30 KPa

40 KPa

✅ The correct answer is option B.

6044. Bernoulli’s equation is not applicable, when the flow is

Irrotational

Incompressible

Viscous

All of the above

✅ The correct answer is option D.

6045. Navier-Stokes equation is useful in the analysis of __________ fluid flow problems.

Non-viscous

Viscous

Turbulent

Rotational

✅ The correct answer is option B.

6046. In continuous fluidisation

Solids are completely entrained

The pressure drop is less than that for batch fluidisation

There is no entrainment of solids

Velocity of the fluid is very small

✅ The correct answer is option A.

6047. Check in a centrifugal pump is

Provided in the discharge line

Generally a globe valve

Provided to prevent liquid from backing up through the pump when the pump is turned off or accidently stops running

All of the above

✅ The correct answer is option D.

6048. A bed consists of particles of density 2000 kg/m³. If the height of the bed is 1.5 metres and its porosity 0.6, the pressure drop required to fluidise the bed by air is

25.61 kPa

11.77 kPa

14.86 kPa

21.13 kPa

✅ The correct answer is option B.

6049. The Mach number for hypersonic flow of compressible fluid is

> 1

> 4

< 2

✅ The correct answer is option C.

6050. With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost

Increases

Decreases

Remains unchanged

Increases exponentially

✅ The correct answer is option B.