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.

4171. Out of the following refrigration cycles, which one has the minimum COP (Co-efficient of performance)?

A. Air cycle

B. Carnot cycle

C. Ordinary vapour compression cycle

D. Vapour compression with a reversible expansion engine

✅ The correct answer is option A.

4172. In case of bubble cap distillation column of diameter greater than 1.2 metres, the cap diameter is roughly about __________ cms.

✅ The correct answer is option A.

4173. Diameter of the seive tray column is determined by the

lower limit of vapour velocity.

upper limit of the vapour velocity.

hole diameter of the seive tray.

height of the plate spacing.

✅ The correct answer is option B.

4174. In the design of a paddle agitator, the ratiois normally taken as

0.1

0.8

0.25

0.5

✅ The correct answer is option B.

4175. Value of Peclet number = 0, is the representative of

laminar flow.

complete back mixing.

plug flow.

eddy diffusivity = 0.

✅ The correct answer is option B.

4176. The main purpose of providing stepping on the trays is to

increase the residence time.

decrease the pressure drop.

facilitate handling of large flow rate of liquid.

improve the flow condition.

✅ The correct answer is option C.

4177. Pick out the wrong statement pertaining to a shell and tube heat exchanger.

The minimum value of baffle spacing is 50 mm.

The maximum value of baffle spacing is equal to the I.D. of the shell.

The maximum unsupported tube span is generally about 75 times tube diameter, but is reduced to about 60 times for aluminium, copper & alloys of these.

Disk and doughnut baffle is the most commonly used baffle.

✅ The correct answer is option D.

4178. In case of a ‘thin’ pressure vessel, the ratio of its diameter to wall thickness is

< 10

> 10

> 20

✅ The correct answer is option B.

4179. Bracket supports are the most suitable for supporting __________ vessels.

thick walled vertical

horizontal

thin shperical (e.g. Horton sphere)

none of these

✅ The correct answer is option A.

4180. Where does the maximum tensile strength occur in a thick cylindrical vessel subjected to internal pressure ?

At the inner surface.

At the mid thickness of the cylindrical wall.

At the outer surface.

None of these.

✅ The correct answer is option A.