Chemical Engineer Intern Certification
Exam Practice Questions And Correct
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Rationale 2026 Q&A| Instant Download
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1. Which fundamental principle is represented by the conservation of
mass in a steady-state chemical process system?
A. Energy can be created but not destroyed
B. Mass is always generated within the system
C. Mass entering equals mass leaving the system
D. Pressure remains constant throughout the system
C
Mass conservation in steady-state systems states that accumulation
is zero, therefore all mass entering the system must equal the mass
leaving it.
2. The SI unit of dynamic viscosity is:
A. Pa·s
B. kg/m³
C. N/m²
D. m²/s
A
, Dynamic viscosity is measured in Pascal-seconds, which reflects
resistance to shear flow in a fluid.
3. Which device is primarily used to measure fluid flow rate in pipelines?
A. Thermometer
B. Venturi meter
C. Barometer
D. Hygrometer
B
A Venturi meter measures flow rate based on pressure differences
created by fluid velocity changes in a constricted section.
4. In thermodynamics, the first law is a statement of:
A. Entropy increase
B. Conservation of energy
C. Mass transfer equilibrium
D. Chemical equilibrium
B
The first law of thermodynamics states that energy cannot be
created or destroyed, only transformed.
5. What is the primary purpose of a heat exchanger?
A. To increase pressure of a fluid
B. To transfer heat between fluids without mixing
C. To separate liquid phases
D. To compress gases
B
Heat exchangers transfer thermal energy between two or more fluids
without allowing them to mix.
6. Which of the following is an intensive property?
A. Mass
B. Volume
, C. Density
D. Total energy
C
Density is independent of system size, making it an intensive
property.
7. Reynolds number is used to determine:
A. Heat capacity
B. Flow regime
C. Reaction rate
D. Pressure drop
B
Reynolds number characterizes whether flow is laminar or turbulent.
8. A catalyst primarily functions by:
A. Increasing equilibrium conversion
B. Decreasing activation energy
C. Increasing reaction temperature
D. Changing product composition
B
Catalysts lower activation energy, increasing reaction rates without
being consumed.
9. Which law governs vapor-liquid equilibrium?
A. Raoult’s law
B. Hooke’s law
C. Fourier’s law
D. Dalton’s law only
A
Raoult’s law relates vapor pressure to mole fraction in ideal liquid
mixtures.
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
1. Which fundamental principle is represented by the conservation of
mass in a steady-state chemical process system?
A. Energy can be created but not destroyed
B. Mass is always generated within the system
C. Mass entering equals mass leaving the system
D. Pressure remains constant throughout the system
C
Mass conservation in steady-state systems states that accumulation
is zero, therefore all mass entering the system must equal the mass
leaving it.
2. The SI unit of dynamic viscosity is:
A. Pa·s
B. kg/m³
C. N/m²
D. m²/s
A
, Dynamic viscosity is measured in Pascal-seconds, which reflects
resistance to shear flow in a fluid.
3. Which device is primarily used to measure fluid flow rate in pipelines?
A. Thermometer
B. Venturi meter
C. Barometer
D. Hygrometer
B
A Venturi meter measures flow rate based on pressure differences
created by fluid velocity changes in a constricted section.
4. In thermodynamics, the first law is a statement of:
A. Entropy increase
B. Conservation of energy
C. Mass transfer equilibrium
D. Chemical equilibrium
B
The first law of thermodynamics states that energy cannot be
created or destroyed, only transformed.
5. What is the primary purpose of a heat exchanger?
A. To increase pressure of a fluid
B. To transfer heat between fluids without mixing
C. To separate liquid phases
D. To compress gases
B
Heat exchangers transfer thermal energy between two or more fluids
without allowing them to mix.
6. Which of the following is an intensive property?
A. Mass
B. Volume
, C. Density
D. Total energy
C
Density is independent of system size, making it an intensive
property.
7. Reynolds number is used to determine:
A. Heat capacity
B. Flow regime
C. Reaction rate
D. Pressure drop
B
Reynolds number characterizes whether flow is laminar or turbulent.
8. A catalyst primarily functions by:
A. Increasing equilibrium conversion
B. Decreasing activation energy
C. Increasing reaction temperature
D. Changing product composition
B
Catalysts lower activation energy, increasing reaction rates without
being consumed.
9. Which law governs vapor-liquid equilibrium?
A. Raoult’s law
B. Hooke’s law
C. Fourier’s law
D. Dalton’s law only
A
Raoult’s law relates vapor pressure to mole fraction in ideal liquid
mixtures.
