Chemical Engineering MCQs
Chemical Engineering MCQs provide a strong foundation for those preparing for competitive exams and interviews in the chemical industry. The questions cover core topics including process calculations, heat transfer, mass transfer, chemical reaction engineering, plant design, safety, and environmental concerns. Whether you are a fresh graduate or preparing for job assessments through FPSC, PPSC, or NTS, this section helps reinforce key concepts and identify knowledge gaps. The MCQs reflect actual exam trends and are especially useful for test-based recruitment and academic success in the chemical engineering field.
Q: Distillation separates components based on differences in
A) Viscosity
B) Density
C) Boiling point
D) Molecular weight
Q: Heat transfer primarily occurs through
A) All of the above
B) Radiation
C) Convection
D) Diffusion
Q: Unit of dynamic viscosity in SI system
A) Poise
B) kg/m²
C) Pascal-second
D) N·m/s
Q: Process used to convert hydrocarbons into aromatics
A) Cracking
B) Polymerization
C) Alkylation
D) Reforming
Q: Main purpose of a scrubber in a chemical plant
A) Removing particulates
B) Absorbing gases
C) Cooling gases
D) Neutralizing acids
Q: Reynolds number helps to determine
A) Fluid velocity
B) Flow regime
C) Heat transfer rate
D) Pressure loss
Q: Flash point is the temperature at which
A) Liquid freezes
B) Vapor ignites briefly
C) Liquid boils
D) Auto-ignition happens
Q: Centrifugal pumps are typically used for
A) High pressure
B) High viscosity
C) Low flow
D) Low viscosity
Q: Hydraulic diameter is relevant in
A) Compressors
B) Open channels
C) Heat exchangers
D) Packed towers
Q: Most common refrigerant in air-conditioning systems
A) Helium
B) Freon
C) Ammonia
D) CO₂