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.

5191. Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

Poor oxidation stability and high gum forming tendency

Greater tendency of decomposition at elevated temperature

Hydrolysis tendency in presence of water

All of the above

✅ The correct answer is option D.

5192. Hydrogen gas is not produced commercially (for nitrogeneous fertiliser manufacture) by

Iron-steam reaction

Electrolysis of water

Steam reforming of naphtha

Its cryogenic separation from coke oven gas

✅ The correct answer is option A.

5193. Sucrose content in the raw juice extracted from sugar cane is about __________ percent.

1-Feb

15 – 20

50 – 60

80 – 85

✅ The correct answer is option B.

5194. Shrinkage volume in cement setting does not depend upon the

Sand to cement ratio

Water to cement ratio

Ambient temperature fluctuation

Drying period

✅ The correct answer is option A.

5195. Liquefaction of gases can not be done by

Exchange of heat with colder stream

Adiabatic expansion through a throttle valve (Joule-Thomson expansion)

Merely compressing it beyond critical pressure

Adiabatic expansion against a piston or in a turbine

✅ The correct answer is option C.

5196. Which of the following is a disacchride?

Sucrose

Glucose

Starch

Maltose

✅ The correct answer is option A.

5197. Glycerine can be obtained from

Fat

Naphthalene

Cumene

Sucrose

✅ The correct answer is option A.

5198. Poly tetraflouro ethylene (P.T.F.E.) is known as

Bakelite

Teflon

Celluloid

Decron

✅ The correct answer is option B.

5199. Plasticisers are added to paints to

Make it corrosion resistant

Make glossy surface

Give elasticity & prevent cracking of the film

Increase atmospheric oxidation

✅ The correct answer is option C.

5200. The difference between saponification value and acid value is

Called ester value

Always negative

Constant for all fatty oils

None of these

✅ The correct answer is option A.