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.

6051. When the water is warm, the height to which it can be lifted by a pump

Decreases due to reduced viscosity

Decreases due to reduced vapour pressure

Increases due to increased vapour pressure

Decreases due to increased frictional resistance

✅ The correct answer is option B.

6052. Cocks are used to control

Water

Any liquid

Solids

None of these

✅ The correct answer is option B.

6053. The normal stress is the same in all directions at a point in a fluid, when the fluid is

Non-viscous

Incompressible

Both A and B

Having no motion of one fluid layer relative to the other

✅ The correct answer is option D.

6054. Water hammer is caused, when water flowing in a pipe is suddenly brought to rest by closing the valve. The extent of pressure thus produced due to water hammer depends on the

Pipe length

Fluid velocity in the pipe

Time taken to close the valve

All of the above

✅ The correct answer is option D.

6055. The pressure drop per unit length of pipe incurred by a fluid ‘X’ flowing through pipe is Δp. If another fluid ‘Y’ having both the specific gravity & density just double of that of fluid ‘X’, flows through the same pipe at the same flow rate/average velocity, then the pressure drop in this case will be

Δp

2Δp

Δp²

Δp/2

✅ The correct answer is option B.

6056. I.D. of 1/4″ schedule 40 pipe is 0.364″. I.D. of a 1/2″ schedule 40 pipe would be __________ inch

4.728

0.5

0.622

0.474

✅ The correct answer is option C.

6057. In centrifugal pump operation, the cavitation can be eliminated by maintaining suction pressure __________ the vapor pressure of the liquid at the suction temperature.

Lower than

Higher than

Equal to

None of these

✅ The correct answer is option B.

6058. What causes convective acceleration in fluid flow?

Steep slope in flow

Unsteady nature of flow

Non-uniformity of flow

Turbulence in flow

✅ The correct answer is option C.

6059. Absolute viscosity of a fluid is a function of the __________ of the fluid.

Motion

Pressure & temperature

Shearing stress

Both B & C

✅ The correct answer is option D.

6060. The range of a particular rotameter can be increased by

Use of floats of different densities

No means

Increasing the diameter of the float

Decreasing the diameter of the float

✅ The correct answer is option A.