Chemical Engineering Examination —
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Q1.
Which law states that, at constant temperature, the pressure of a fixed
amount of gas is inversely proportional to its volume?
A. Charles's law
B. Boyle's law
C. Avogadro's law
D. Dalton's law
Answer: B. Boyle's law
,Rationale: Boyle's law states that for a fixed amount of gas at constant
temperature, pressure is inversely proportional to volume, expressed as
P1V1=P2V2P_1V_1=P_2V_2.
Q2.
A material balance around a steady-state process with no reaction is based
primarily on which principle?
A. Conservation of momentum
B. Conservation of energy
C. Conservation of mass
D. Conservation of entropy
Answer: C. Conservation of mass
Rationale: A material balance applies conservation of mass: mass entering
minus mass leaving equals accumulation, with reaction terms included
when applicable.
Q3.
What is the primary purpose of a distillation column?
,A. Remove suspended solids
B. Separate components based primarily on differences in volatility
C. Increase fluid viscosity
D. Reduce particle size
Answer: B. Separate components based primarily on differences in
volatility
Rationale: Distillation uses vapor-liquid equilibrium and differences in
component volatility to achieve separation.
Q4.
Which dimensionless number represents the ratio of inertial forces to
viscous forces?
A. Reynolds number
B. Prandtl number
C. Schmidt number
D. Nusselt number
Answer: A. Reynolds number
Rationale: The Reynolds number compares inertial forces with viscous
forces and is commonly used to characterize laminar or turbulent flow.
, Q5.
For incompressible flow through a pipe of constant diameter under steady-
state conditions, the average velocity is generally:
A. Increasing continuously
B. Zero
C. Constant
D. Equal to the pressure
Answer: C. Constant
Rationale: Continuity requires constant volumetric flow rate for steady
incompressible flow through a constant-area pipe, so average velocity
remains constant.
Q6.
Which equation is commonly used to relate pressure, velocity, and elevation
in ideal steady incompressible flow?
A. Arrhenius equation
B. Bernoulli equation
PracticeExam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2027 Q&A | Instant
Download Pdf
Q1.
Which law states that, at constant temperature, the pressure of a fixed
amount of gas is inversely proportional to its volume?
A. Charles's law
B. Boyle's law
C. Avogadro's law
D. Dalton's law
Answer: B. Boyle's law
,Rationale: Boyle's law states that for a fixed amount of gas at constant
temperature, pressure is inversely proportional to volume, expressed as
P1V1=P2V2P_1V_1=P_2V_2.
Q2.
A material balance around a steady-state process with no reaction is based
primarily on which principle?
A. Conservation of momentum
B. Conservation of energy
C. Conservation of mass
D. Conservation of entropy
Answer: C. Conservation of mass
Rationale: A material balance applies conservation of mass: mass entering
minus mass leaving equals accumulation, with reaction terms included
when applicable.
Q3.
What is the primary purpose of a distillation column?
,A. Remove suspended solids
B. Separate components based primarily on differences in volatility
C. Increase fluid viscosity
D. Reduce particle size
Answer: B. Separate components based primarily on differences in
volatility
Rationale: Distillation uses vapor-liquid equilibrium and differences in
component volatility to achieve separation.
Q4.
Which dimensionless number represents the ratio of inertial forces to
viscous forces?
A. Reynolds number
B. Prandtl number
C. Schmidt number
D. Nusselt number
Answer: A. Reynolds number
Rationale: The Reynolds number compares inertial forces with viscous
forces and is commonly used to characterize laminar or turbulent flow.
, Q5.
For incompressible flow through a pipe of constant diameter under steady-
state conditions, the average velocity is generally:
A. Increasing continuously
B. Zero
C. Constant
D. Equal to the pressure
Answer: C. Constant
Rationale: Continuity requires constant volumetric flow rate for steady
incompressible flow through a constant-area pipe, so average velocity
remains constant.
Q6.
Which equation is commonly used to relate pressure, velocity, and elevation
in ideal steady incompressible flow?
A. Arrhenius equation
B. Bernoulli equation
