Engineering Thermodynamics Test Bank
ENGINEERING THERMODYNAMICS
1. The given figure shows the variation of force in an elementary system which undergoes a process
during which the plunger position changes from 0 to 3 m.
IF the internal energy of the system at the end of the process is 2.5 J higher, then the heat absorbed
during the process is
a) 15 J
b) 20 J
c) 25 J
d) 30 J
2. A frictionless piston-cylinder device contains a gas initially at 0.8 MPa and 0.015 m3. It expands quasi-
statically at constant temperature to a final volume of 0.030 m3. The work output (in kJ/kg) during this
process will be:
a) 8.32
b) 12
c) 554.67
d) 8320
3. Which one of the following correctly defined 1 K, as per the internationally accepted definition of
temperature scale?
a) 1/100th of the difference between normal boiling point and normal freezing point of water
b) 1/273.15th of the normal freezing point of water
c) 100 times the difference between the triple point of water and the normal freezing point of water
d) 1/273.15th of the triple point of water
, Engineering Thermodynamics Test Bank
4. When a system is taken from state ‘x’ to state ‘y’. 30 kJ of heat flows into the system and the system
does 10 kJ of work. When the system is returned from ‘y’ to ‘x’ along another path, work done on the
system is 8 kJ. What is the amount of heat liberated or absorbed?
a) 12 kJ of heat is liberated
b) 12 kJ of heat is absorbed
c) 28 kJ of heat is liberated
d) 28 kJ of heat is absorbed
5. In an adiabatic process, 5000J of work is performed on a system. The system
returns to its original state while 1000J of heat is added. The work done during
the non-adiabatic process is:
a) + 4000J
b) - 4000J
c) + 6000J
d) - 6000J
6. An engine working on Carnot cycle rejects 40% of absorbed heat from the source, while the sink
temperature is maintained at 27°C, then what is the source temperature?
a) 750°C
b) 477°C
c) 203°C
d) 67.5°C
7. Gibbs function is expressed as
a) u+pv-Ts
b) u+pv-Tds
, Engineering Thermodynamics Test Bank
c) u+pdv-Tds
d) u+pv-sdT
8. The Figure shown is the phase diagram (p-T diagram) for water. Identify the region in which water
exists as liquid
a) Region “X”
b) Region “Z”
c) Region “X and Z”
d) Region “Y”
9. The summation of internal energy (u) and flow energy (pv) is known as ……………..
a) enthalpy
b) entropy
c) heat capacity
d) total internal energy
10. The chart which is drawn with compressibility factor (Z) and reduced properties is called as
…………………..
a) Compressibility chart
b) Generalized compressibility chart
c) property chart
d) ideal gas chart
11. Increase in entropy of a system represents
, Engineering Thermodynamics Test Bank
a) Increase in available energy
b) Decreases in pressure
c) Degradation of energy
d) Increase in temperature
12. Gibbs free energy functions is a property comprising
a) pressure, volume, temperature
b) enthalpy, temperature, entropy
c) volume, enthalpy and entropy
d) temperature, pressure and enthalpy
13. The degree of freedom at triple point in unary diagram for water is
a) 0
b) 1
c) 2
d) 3
14. The exergy of an isolated system
a) Can never decreases
b) Can never increases
c) Always remains constant
d) Can’t be predictable
15. Which of the following are intensive properties
(i). Kinetic Energy (ii). Specific Enthalpy (iii). Pressure (iv). Entropy
ENGINEERING THERMODYNAMICS
1. The given figure shows the variation of force in an elementary system which undergoes a process
during which the plunger position changes from 0 to 3 m.
IF the internal energy of the system at the end of the process is 2.5 J higher, then the heat absorbed
during the process is
a) 15 J
b) 20 J
c) 25 J
d) 30 J
2. A frictionless piston-cylinder device contains a gas initially at 0.8 MPa and 0.015 m3. It expands quasi-
statically at constant temperature to a final volume of 0.030 m3. The work output (in kJ/kg) during this
process will be:
a) 8.32
b) 12
c) 554.67
d) 8320
3. Which one of the following correctly defined 1 K, as per the internationally accepted definition of
temperature scale?
a) 1/100th of the difference between normal boiling point and normal freezing point of water
b) 1/273.15th of the normal freezing point of water
c) 100 times the difference between the triple point of water and the normal freezing point of water
d) 1/273.15th of the triple point of water
, Engineering Thermodynamics Test Bank
4. When a system is taken from state ‘x’ to state ‘y’. 30 kJ of heat flows into the system and the system
does 10 kJ of work. When the system is returned from ‘y’ to ‘x’ along another path, work done on the
system is 8 kJ. What is the amount of heat liberated or absorbed?
a) 12 kJ of heat is liberated
b) 12 kJ of heat is absorbed
c) 28 kJ of heat is liberated
d) 28 kJ of heat is absorbed
5. In an adiabatic process, 5000J of work is performed on a system. The system
returns to its original state while 1000J of heat is added. The work done during
the non-adiabatic process is:
a) + 4000J
b) - 4000J
c) + 6000J
d) - 6000J
6. An engine working on Carnot cycle rejects 40% of absorbed heat from the source, while the sink
temperature is maintained at 27°C, then what is the source temperature?
a) 750°C
b) 477°C
c) 203°C
d) 67.5°C
7. Gibbs function is expressed as
a) u+pv-Ts
b) u+pv-Tds
, Engineering Thermodynamics Test Bank
c) u+pdv-Tds
d) u+pv-sdT
8. The Figure shown is the phase diagram (p-T diagram) for water. Identify the region in which water
exists as liquid
a) Region “X”
b) Region “Z”
c) Region “X and Z”
d) Region “Y”
9. The summation of internal energy (u) and flow energy (pv) is known as ……………..
a) enthalpy
b) entropy
c) heat capacity
d) total internal energy
10. The chart which is drawn with compressibility factor (Z) and reduced properties is called as
…………………..
a) Compressibility chart
b) Generalized compressibility chart
c) property chart
d) ideal gas chart
11. Increase in entropy of a system represents
, Engineering Thermodynamics Test Bank
a) Increase in available energy
b) Decreases in pressure
c) Degradation of energy
d) Increase in temperature
12. Gibbs free energy functions is a property comprising
a) pressure, volume, temperature
b) enthalpy, temperature, entropy
c) volume, enthalpy and entropy
d) temperature, pressure and enthalpy
13. The degree of freedom at triple point in unary diagram for water is
a) 0
b) 1
c) 2
d) 3
14. The exergy of an isolated system
a) Can never decreases
b) Can never increases
c) Always remains constant
d) Can’t be predictable
15. Which of the following are intensive properties
(i). Kinetic Energy (ii). Specific Enthalpy (iii). Pressure (iv). Entropy
