Solutions for Principles of Engineering
Thermodynamics, 2nd Edition Reisel (All Chapters
Included)
Chapter 1: Basic Concepts
1. Which of the following is an intensive property?
a) Mass
b) Volume
c) Temperature
d) Energy
2. A system where no mass crosses the boundary is called:
a) Open system
b) Closed system
c) Isolated system
d) Adiabatic system
3. The Zeroth Law of Thermodynamics deals with:
a) Conservation of energy
b) Conservation of mass
c) Thermal equilibrium and temperature
d) Entropy increase
4. Which process occurs at constant volume?
a) Isobaric
b) Isothermal
c) Isochoric
d) Isentropic
5. Pressure measured relative to a perfect vacuum is called:
a) Gage pressure
b) Absolute pressure
c) Atmospheric pressure
d) Differential pressure
Chapter 2: Energy and the First Law of Thermodynamics
,6. The total energy of a system that is stationary and not affected by gravity, electricity, etc., is
its:
a) Kinetic energy
b) Potential energy
c) Internal energy
d) Enthalpy
7. For a closed system undergoing a cycle, the net heat transfer is equal to the net:
a) Internal energy change
b) Enthalpy change
c) Work transfer
d) Entropy change
8. The property defined as (u + Pv) is:
a) Internal energy
b) Entropy
c) Enthalpy
d) Helmholtz function
9. A rigid, insulated tank is filled with a gas. The process is:
a) Isobaric
b) Isothermal
c) Isentropic
d) Isochoric and adiabatic
10. The first law for a closed system is mathematically expressed as:
a) Q = ΔU + W
b) Q - W = ΔU
c) ΔU = W
d) Q = ΔH
Chapter 3: Properties of Pure Substances
11. At the critical point:
a) Liquid and vapor phases are identical
b) The saturated liquid line ends
c) The saturated vapor line begins
d) The triple point is reached
12. The quality (x) of a liquid-vapor mixture is defined as the ratio of:
a) Mass of vapor to total mass
,b) Mass of liquid to total mass
c) Volume of vapor to total volume
d) Volume of liquid to total volume
13. In the superheated vapor region, temperature and pressure are:
a) Dependent properties
b) Independent properties
c) Always equal
d) Related by quality
14. For a compressed liquid, property values are approximately equal to those of the saturated
liquid at the:
a) Same pressure
b) Same temperature
c) Same volume
d) Critical temperature
15. The phase change from vapor to liquid is called:
a) Vaporization
b) Sublimation
c) Condensation
d) Fusion
Chapter 4: Analysis of Closed Systems
16. For a constant pressure process in a closed system, the boundary work is given by:
a) P ΔV
b) V ΔP
c) mRΔT
d) Zero
17. A process where no heat transfer occurs is:
a) Isothermal
b) Isobaric
c) Adiabatic
d) Isentropic
18. The polytropic process is described by the equation:
a) PV = constant
b) PV^n = constant
, c) P/T = constant
d) V/T = constant
19. The work done in an isochoric process is:
a) P ΔV
b) C_v ΔT
c) Zero
d) C_p ΔT
20. The specific heat at constant volume, c_v, is defined as:
a) (∂h/∂T)_p
b) (∂u/∂T)_v
c) (∂u/∂P)_v
d) (∂h/∂P)_T
Chapter 5: Analysis of Open Systems (Control Volumes)
21. The first law for a steady-flow, single-inlet, single-outlet control volume neglecting kinetic
and potential energy changes is:
a) Q - W = ΔU
b) Q - W = m(h2 - h1)
c) Q = ΔH
d) W = ΔH
22. A device that increases the pressure of a fluid by doing work on it is a:
a) Turbine
b) Compressor
c) Nozzle
d) Throttle
23. For a throttling device (e.g., a valve), a good assumption is:
a) ΔP = 0
b) ΔT = 0
c) Δh = 0
d) Δs = 0
24. A steady-flow device that produces work by expanding a fluid is a:
a) Pump
b) Compressor
c) Turbine
d) Boiler
Thermodynamics, 2nd Edition Reisel (All Chapters
Included)
Chapter 1: Basic Concepts
1. Which of the following is an intensive property?
a) Mass
b) Volume
c) Temperature
d) Energy
2. A system where no mass crosses the boundary is called:
a) Open system
b) Closed system
c) Isolated system
d) Adiabatic system
3. The Zeroth Law of Thermodynamics deals with:
a) Conservation of energy
b) Conservation of mass
c) Thermal equilibrium and temperature
d) Entropy increase
4. Which process occurs at constant volume?
a) Isobaric
b) Isothermal
c) Isochoric
d) Isentropic
5. Pressure measured relative to a perfect vacuum is called:
a) Gage pressure
b) Absolute pressure
c) Atmospheric pressure
d) Differential pressure
Chapter 2: Energy and the First Law of Thermodynamics
,6. The total energy of a system that is stationary and not affected by gravity, electricity, etc., is
its:
a) Kinetic energy
b) Potential energy
c) Internal energy
d) Enthalpy
7. For a closed system undergoing a cycle, the net heat transfer is equal to the net:
a) Internal energy change
b) Enthalpy change
c) Work transfer
d) Entropy change
8. The property defined as (u + Pv) is:
a) Internal energy
b) Entropy
c) Enthalpy
d) Helmholtz function
9. A rigid, insulated tank is filled with a gas. The process is:
a) Isobaric
b) Isothermal
c) Isentropic
d) Isochoric and adiabatic
10. The first law for a closed system is mathematically expressed as:
a) Q = ΔU + W
b) Q - W = ΔU
c) ΔU = W
d) Q = ΔH
Chapter 3: Properties of Pure Substances
11. At the critical point:
a) Liquid and vapor phases are identical
b) The saturated liquid line ends
c) The saturated vapor line begins
d) The triple point is reached
12. The quality (x) of a liquid-vapor mixture is defined as the ratio of:
a) Mass of vapor to total mass
,b) Mass of liquid to total mass
c) Volume of vapor to total volume
d) Volume of liquid to total volume
13. In the superheated vapor region, temperature and pressure are:
a) Dependent properties
b) Independent properties
c) Always equal
d) Related by quality
14. For a compressed liquid, property values are approximately equal to those of the saturated
liquid at the:
a) Same pressure
b) Same temperature
c) Same volume
d) Critical temperature
15. The phase change from vapor to liquid is called:
a) Vaporization
b) Sublimation
c) Condensation
d) Fusion
Chapter 4: Analysis of Closed Systems
16. For a constant pressure process in a closed system, the boundary work is given by:
a) P ΔV
b) V ΔP
c) mRΔT
d) Zero
17. A process where no heat transfer occurs is:
a) Isothermal
b) Isobaric
c) Adiabatic
d) Isentropic
18. The polytropic process is described by the equation:
a) PV = constant
b) PV^n = constant
, c) P/T = constant
d) V/T = constant
19. The work done in an isochoric process is:
a) P ΔV
b) C_v ΔT
c) Zero
d) C_p ΔT
20. The specific heat at constant volume, c_v, is defined as:
a) (∂h/∂T)_p
b) (∂u/∂T)_v
c) (∂u/∂P)_v
d) (∂h/∂P)_T
Chapter 5: Analysis of Open Systems (Control Volumes)
21. The first law for a steady-flow, single-inlet, single-outlet control volume neglecting kinetic
and potential energy changes is:
a) Q - W = ΔU
b) Q - W = m(h2 - h1)
c) Q = ΔH
d) W = ΔH
22. A device that increases the pressure of a fluid by doing work on it is a:
a) Turbine
b) Compressor
c) Nozzle
d) Throttle
23. For a throttling device (e.g., a valve), a good assumption is:
a) ΔP = 0
b) ΔT = 0
c) Δh = 0
d) Δs = 0
24. A steady-flow device that produces work by expanding a fluid is a:
a) Pump
b) Compressor
c) Turbine
d) Boiler
