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: Isothermal process maintains constant
A) Volume
B) Entropy
C) Pressure
D) Temperature
✅ Correct Answer: D
Explanation: Isothermal means constant temperature.
Q: Entropy is a measure of
A) Energy
B) Heat
C) Pressure
D) Disorder
✅ Correct Answer: D
Explanation: Thermodynamic property indicating randomness.
Q: In P&ID diagrams, control valves are represented by
A) Diamonds
B) Squares
C) Triangles
D) Circles
✅ Correct Answer: C
Explanation: Symbols are standardized in instrumentation.
Q: Gas absorption is best when gas solubility is
A) Low
B) Constant
C) Negative
D) High
✅ Correct Answer: D
Explanation: Greater solubility improves absorption.
Q: First law of thermodynamics deals with
A) Heat loss
B) Energy conservation
C) Entropy
D) Power generation
✅ Correct Answer: B
Explanation: Energy can neither be created nor destroyed.