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.

6091. A rotameter through which air at room temperature and atmospheric pressure is flowing gives a certain reading for a flow rate of 100 cc/sec. If helium (molecular weight 4) is used and rotameter shows the same reading, the flow rate (cc/sec) is

269

325

✅ The correct answer is option C.

6092. Foot valve provided in the pump is a __________ valve.

Direction control

Back pressure

Relief

Pressure reduction

✅ The correct answer is option B.

6093. An equipotential line is __________ to the velocity vector at every point.

Normal

Tangential

None of these

✅ The correct answer is option A.

6094. If more than two branches of pipes are to be connected at the same point, then use a/an

Elbow

Union

Tee

None of these

✅ The correct answer is option C.

6095. Fanning equation is given by ∆p/ρ = 4f. L/D . v²/2g<.sub>c . It is applicable to __________ region flow.

Transition

Laminar

Turbulent

Both B and C

✅ The correct answer is option D.

6096. Higher specific speed (200-500) of a centrifugal pump indicates that the pump is of __________ flow type.

Axial

Radial

Mixed

None of these

✅ The correct answer is option A.

6097. Capacity of a rotary gear pump can be varied by

Changing the speed of rotation

Bleeding air into suction

Bypassing liquid from the suction or discharge line

All of the above

✅ The correct answer is option D.

6098. Purpose of hydraulic accumulator is to

Ensure intermittant supply of hydraulic pressure

Increase the pressure and store/ accumulate it

Accumulate pressure to increase force

Generate high pressure to operate hydraulic machines like cranes, lifts, presses etc

✅ The correct answer is option D.

6099. The valve used for very remote and accurate control of fluid is a __________ valve.

Needle

Globe

Gate

Butterfly

✅ The correct answer is option A.

6100. In an incompressible flow of fluid, the fluid

Temperature remains constant

Compressibility is greater than zero

Density does not change with pressure & temperature

Is frictionless

✅ The correct answer is option C.