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.

271. Shrinkage allowance on pattern is provided to compensate for shrinkage when the

A. Metal changes from liquid state to solid state at freezing temperature

B. Solid phase temperature drops from freezing temperature to the room temperature

C. Liquid metal temperature drops from pouring temperature to room temperature

D. Liquid metal temperature drops from pouring temperature to freezing temperature

✅ The correct answer is option B.

272. Potable water means the water used for

A. Fire-fighting

B. Cooling

C. Drinking

D. Evaporation to produce steam

✅ The correct answer is option C.

273. Galvanic corrosion can not be prevented by

A. Cathodic protection

B. Anodic protection

C. Usage of largest possible anodic area

D. Any one of these

✅ The correct answer is option B.

274. Failure of a material is attributed to __________ if it fails below its yield point.

A. Impact loading

B. Fatigue

C. Creep

D. Straining

✅ The correct answer is option B.

275. Maxwell’s thermodynamic relations applies to the

A. Chemical systems in equilibrium

B. Mechanical systems in equilibrium

C. Irreversible thermodynamic processes

D. Reversible thermodynamic processes

✅ The correct answer is option A.

276. Coating of zinc over steel is known as

A. Cladding

B. Galvanising

C. Anodising

D. Passivation

✅ The correct answer is option B.

277. Device used as a standard for the calibration of pressure gauges is a

A. Bellow

B. Diaphragm

C. Dead weight pressure tester

D. Mercury manometer

✅ The correct answer is option C.

278. Change in volume of metals from absolute zero temperature to their melting points is

A. Almost same for all metals

B. Different for different metals

C. Less for low melting point metals

D. Less for high melting point metals

✅ The correct answer is option A.

279. The activity of pure hydrogen gas at 1000°C and 5 atm pressure

A. Is always less than 1

B. Is always greater than 1

C. Can be 5

D. Depends on the choice of the standard state

✅ The correct answer is option D.

280. In hot working, dynamic recovery occurs in

A. Metals of low stacking fault energy

B. Metals of high stacking fault energy e.g. α-iron

C. Single crystal of Ni-based superalloys

D. None of these

✅ The correct answer is option B.