Chemical Engineering MCQs
Chemical Engineering MCQs cover process calculations, heat/mass transfer, reaction engineering, plant design, safety, and environment, helping FPSC, PPSC, NTS candidates and graduates strengthen concepts, match exam trends, and prepare for competitive tests and chemical industry careers.
Q: Boiling point elevation is used in
A) Crystallization
B) Evaporation
C) Filtration
D) Reverse osmosis
✅ Correct Answer: B
Explanation: Evaporation benefits from boiling point elevation to separate liquids from solids.
Q: Slurry transport in pipelines requires
A) Peristaltic pumps
B) Gear pumps
C) Positive displacement pumps
D) Centrifugal pumps
✅ Correct Answer: D
Explanation: Centrifugal pumps are preferred for handling abrasive slurry materials.
Q: The main reason for catalyst deactivation
A) Acid-base reaction
B) Coking
C) Oxidation
D) Overheating
✅ Correct Answer: B
Explanation: Carbon deposition or coking blocks active sites on catalyst surfaces.
Q: Degree of freedom in a two-component system with one phase
A) 1
B) 0
C) 2
D) 3
✅ Correct Answer: C
Explanation: Gibbs phase rule: F = C - P + 2 → 2 - 1 + 2 = 3.
Q: Reynolds number is the ratio of
A) Inertial to viscous forces
B) Heat to mass transfer
C) Work to energy
D) Pressure to velocity
✅ Correct Answer: A
Explanation: It predicts flow regime based on the ratio of inertial to viscous forces.