Chemical Engineering Exam Questions And Answers {100% Correct} Lates
Update 2026!!!
1. Describe the dif- Chemists are on a smaller scale, do more research, are innovative, document
ference between reactions, and develop new compounds. Chemical Engineers work with existing
Chemists and materials, are on a larger scale, and focus on storage/transport and plant de-
Chemical Engi- sign/operation. Both take chemistry, bust chemists take more detailed courses.
neers
2. What is Chem- The scientific study of materials, their composition and structure, properties, inter-
istry? actions, and changes they undergo.
3. What are Ther- The study of work, energy, and eflciency in large-scale systems.
modynamics?
4. Zeroth Law Thermal Equilibrium
5. First Law Law of conservation of energy
6. Second Law Energy will naturally disperse
7. Entropy The tendency of all energy and matter to seek a state of uniformity
8. Third Law The colder a substance gets, the less its atoms move
9. What are Fluid Study of fluid flow
Dynamics?
10. Turbulent Flow Velocity fluctuations; highly disordered
Contains swirls of water called "eddies"
Fluid particles flow in many directions with no observable paths
As turbulent flow increases, so does energy needed to move it
Inertial forces dominate
11. Laminar Flow Has no disruption between layers of fluid
Smooth streamlines, highly ordered
1/6
, Little to no mixing; particles flow in a straight path
Viscous forces dominate
12. What is Fluid Flow Reynolds Number
characterized by? RN = Density x Velocity x Diameter of Pipe / Dynamic Viscosity
Under 2,500 => Laminar
Over 10,000 => Turbulence
13. Mass Balance States that matter cannot be created or destroyed and must be constant in a closed
loop.
Amount of material that exists prior to chemical reaction is equal to the amount of
material after the reaction.
14. Differential Mass Measurement taken at the same point over time.
Balance Applied to a continuous process.
Should always be the same.
Each term in a ditterential balance equation represents a process stream and the
mass flow rate of the chemical(s) in that stream.
15. Integral Mass Are taken at 2 ditterent points to show what is happening between 1 point and
Balance another.
Typically taken at beginning and end of process.
Each term in an integral balance represents a process stream and the mass of the
chemical(s) in that stream.
16. Fluid Flow Rate, What are crucial to measure?
Pressure, and
Temperature
17. Differential Pres- Relies on the concept that as speed of a fluid increases, its pressure decreases.
sure Flowmeter Constrict the flow using an obstruction or narrowing of the pipe.
Flow Rate = Pressure at obstruction vs Pressure away from obstruction
2/6
Update 2026!!!
1. Describe the dif- Chemists are on a smaller scale, do more research, are innovative, document
ference between reactions, and develop new compounds. Chemical Engineers work with existing
Chemists and materials, are on a larger scale, and focus on storage/transport and plant de-
Chemical Engi- sign/operation. Both take chemistry, bust chemists take more detailed courses.
neers
2. What is Chem- The scientific study of materials, their composition and structure, properties, inter-
istry? actions, and changes they undergo.
3. What are Ther- The study of work, energy, and eflciency in large-scale systems.
modynamics?
4. Zeroth Law Thermal Equilibrium
5. First Law Law of conservation of energy
6. Second Law Energy will naturally disperse
7. Entropy The tendency of all energy and matter to seek a state of uniformity
8. Third Law The colder a substance gets, the less its atoms move
9. What are Fluid Study of fluid flow
Dynamics?
10. Turbulent Flow Velocity fluctuations; highly disordered
Contains swirls of water called "eddies"
Fluid particles flow in many directions with no observable paths
As turbulent flow increases, so does energy needed to move it
Inertial forces dominate
11. Laminar Flow Has no disruption between layers of fluid
Smooth streamlines, highly ordered
1/6
, Little to no mixing; particles flow in a straight path
Viscous forces dominate
12. What is Fluid Flow Reynolds Number
characterized by? RN = Density x Velocity x Diameter of Pipe / Dynamic Viscosity
Under 2,500 => Laminar
Over 10,000 => Turbulence
13. Mass Balance States that matter cannot be created or destroyed and must be constant in a closed
loop.
Amount of material that exists prior to chemical reaction is equal to the amount of
material after the reaction.
14. Differential Mass Measurement taken at the same point over time.
Balance Applied to a continuous process.
Should always be the same.
Each term in a ditterential balance equation represents a process stream and the
mass flow rate of the chemical(s) in that stream.
15. Integral Mass Are taken at 2 ditterent points to show what is happening between 1 point and
Balance another.
Typically taken at beginning and end of process.
Each term in an integral balance represents a process stream and the mass of the
chemical(s) in that stream.
16. Fluid Flow Rate, What are crucial to measure?
Pressure, and
Temperature
17. Differential Pres- Relies on the concept that as speed of a fluid increases, its pressure decreases.
sure Flowmeter Constrict the flow using an obstruction or narrowing of the pipe.
Flow Rate = Pressure at obstruction vs Pressure away from obstruction
2/6
