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.

4341. Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about __________ mm Hg (referred to a 760 mm mercury barometer).

250

450

650

750

✅ The correct answer is option C.

4342. Seamless pipe is made

from rolled strips formed into cylinders and seam-welded.

by extrusion & casting into static and centrifugal molds.

by forging a solid round, piercing it by simultaneously rotating & forcing it over a piercer point and further reducing it by rolling gas drawing.

both (b) and (c).

✅ The correct answer is option D.

4343. In a __________ rivetted joint, the rivets in the various rows are opposite to each other.

zig-zag

chain

diamond

none of these

✅ The correct answer is option B.

4344. __________ tower is the most suitable gas-liquid contacting device involving highly corrosive fluids.

Sieve plate

Packed

Bubble cap plate

None of these

✅ The correct answer is option B.

4345. The raio, is normally taken as

0.15-030

0.5-0.65

0.75-0.85

0.60-0.90

✅ The correct answer is option A.

4346. Generally, no corrosion allowance in wall thickness of a part is required, if the thickness is more than __________ mm.

✅ The correct answer is option C.

4347. The length of straight rectangular weir used on cross-flow trays is generally __________ the column diameter.

0.6-0.8 times

equal to

twice

2 ft irrespective of (for column > 3 ft diameter)

✅ The correct answer is option A.

4348. The units of Young’s modulus of elasticity and __________ are the same.

strain

stress

modular ratio

none of these

✅ The correct answer is option B.

4349. __________ tray arrangement is recommended for distillation column having diameter upto 4 ft.

Radial flow

Cross flow

Split flow

Cascade

✅ The correct answer is option B.

4350. The practical representative values of HETP for a number of commercial operations lies within a range of __________ metre.

0.1-0.2

0.2-0.5

0.4-0.9

1.2-1.5

✅ The correct answer is option C.