Basic Chemical Engineering MCQs

Practice Basic Chemical Engineering MCQs with answers and explanations to prepare for exams, interviews, and job tests. Our question bank covers fundamental topics such as units and dimensions, material and energy balances, fluid mechanics, thermodynamics, heat transfer, mass transfer, and chemical process basics. These multiple-choice questions are designed for students, fresh graduates, and competitive exam aspirants preparing for NTS, PPSC, FPSC, PEC exams, GATE, university entry tests, and recruitment assessments. Strengthen your core concepts and problem-solving skills with our updated Basic Chemical Engineering MCQs.

371. Fatigue life is expected to increase by

A. Increasing the size of the sample

B. Smooth polishing of the surface of the sample

C. Having compressive residual stresses at the surface

D. Having tensile residual stresses at the surface

✅ The correct answer is option C.

372. All radiations falling on a black body are

A. Refracted

B. Reflected

C. Transmitted

D. Absorbed

✅ The correct answer is option D.

373. Which of the following performance characteristics of a S.I engine is not affected by the front end volatility of the petrol used?

A. Vapour locking

B. Hot starting

C. Spark plug fouling

D. All of the above

✅ The correct answer is option C.

374. A spring material should have low

A. Elastic limit

B. Deflection value

C. Fatigue resistance

D. None of these

✅ The correct answer is option D.

375. The magnitude of water hammer caused in pipe flow is independent of the

A. Pipe length

B. Fluid flow stoppage rate

C. Fluid temperature

D. Time of valve closure

✅ The correct answer is option C.

376. Function of blow down valve in a boiler is to

A. Maintain the drum level

B. Keep the drum pressure constant

C. Drain out the sludge from the drum

D. Empty the boiler during shutdown

✅ The correct answer is option C.

377. Maximum permissible sulphur content in steel is __________ percent.

A. 0.015

B. 0.055

C. 0.505

D. 0.805

✅ The correct answer is option A.

378. Gross & Net calorific values will be the same for

A. Methane

B. Propane

C. Carbon monoxide

D. Hydrogen

✅ The correct answer is option C.

379. Propulsion of rocket follows from the

A. Newton’s second law of motion

B. Newton’s third law of motion

C. Law of projectiles

D. Archimedes principle

✅ The correct answer is option B.

380. A __________ type pressure sensing element is commonly used in aneroid barometer.

A. Capsule

B. Bellow

C. Spiral tube

D. Flat diaphragm

✅ The correct answer is option A.