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.

41. Feed check valve is used in steam boilers to

A. Check the water level in the boiler
B. Check the feed water flow rate
C. Feed high pressure water to boiler and guard against its backflow through it
D. None of these
✅ The correct answer is option C.

43. Pick out the wrong statement about nucleate boiling.

A. Bubble generation is by expansion of entrapped gas/vapour at small cavities in the surface
B. Surface temperature is greater than the saturation temperature of the liquid
C. Heat transfer from the surface of the liquid is less than that in film boiling
D. The temperature is less than that of film boiling
✅ The correct answer is option D.

45. LASER

A. Stands for Light Amplification by Stimulated Emission of Radiation
B. Has the same intensity as visible light
C. Can’t be used for cutting metals
D. None of these
✅ The correct answer is option A.

48. In chemical dehumidification process

A. Wet bulb temperature increases
B. Dry bulb temperature remains constant
C. Dew point temperature increases
D. Dry bulb temperature increases
✅ The correct answer is option B.
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