REVIEWER IN POWER AND INDUSTRIAL PLANT A. Equilibrium system B.

Isolated system
ENGINEERING Terms and Concepts C. Open system D. Closed system
14. Open system usually encloses which of the
1. The term “thermodynamics” comes from Greek
following devices?
words “therme” and “dynamis” which means
A. Compressor B. Turbine
_______.
C. Nozzle D. All of the above
A. Heat power B. Heat transfer
15. The boundaries of a control volume, which may
C. Heat energy D. Heat motion
either real or imaginary is called _____.
2. The term “thermodynamics” was first used in
A. Control boundary B. Control system
1849 in the publication of a
C. Interface D. Control surface
A. Rudolph Clausius B. William Rankine
16. Any characteristic of a thermodynamics system
C. Lord Kelvin D. Thomas Savery
is called a _____.
3. What law asserts that energy is a
A. Property B. Process
thermodynamic property?
A. First law of Thermodynamics C. Phase D. Cycle
B. Second law of Thermodynamics 17. How are thermodynamic properties classified?
C. Third law of Thermodynamics A. Physical and chemical
D. Zeroth law of Thermodynamics B. Intensive and extensive
4. What law asserts that energy has quality as C. Real and imaginary
well as quantity? D. Homogeneous and heterogeneous
18. The thermodynamic properties that are
A. First law of Thermodynamics
independent on the size of the system is
B. Second law of Thermodynamics
called _____.
C. Third law of Thermodynamics
A. Extensive property B. Intensive property
D. Zeroth law of Thermodynamics
C. Open property D. Closed property
5. The macroscopic approach to the study of
19. The thermodynamic properties that are
thermodynamics does not require a knowledge
dependent on the size or extent of the system
of the behavior of individual particles is
is called _____.
called _____.
A. Extensive property B. Intensive property
A. Dynamic thermodynamics
C. Open property D. Closed property
B. Static thermodynamics
20. Which is NOT an intensive property of
C. Statistical thermodynamics
thermodynamics?
D. Classical thermodynamics
A. Temperature B. Mass
6. What is the more elaborate approach to the
C. Pressure D. Density
study of thermodynamics and based on the
21. Which is NOT an extensive property of
average behavior of large groups of individual
thermodynamics?
particles?
A. Density B. Mass
A. Dynamic thermodynamics
C. Volume D. Energy
B. Static thermodynamics
22. Extensive properties per unit mass are called
C. Statistical thermodynamics
D. Classical thermodynamics _____.
7. What is defined a region in space chosen for A. Specific properties
study? B. Relative properties
A. Surroundings B. System C. Unit properties
C. Boundary D. Volume D. Phase properties
8. The first law of thermodynamics is based on 23. A system is in ______ equilibrium if the
temperature is the same throughout the entire
which of the following principles?
system.
A. Conservation of mass
A. Static B. Thermal
B. Conservation of energy
C. Mechanical D. Phase
C. Action and reaction
24. A system is in ______ equilibrium if there is
D. The entropy-temperature relationship
no change in pressure at any point of the
9. What is the mass or region outside the system
system with time.
called?
A. Pressure B. Thermal
A. Surroundings B. Boundary
C. Mechanical D. Phase
C. Volume D. Environment
25. If a system involves two phases, it is in
10. What is the real or imaginary surface that
______ equilibrium when the mass of each phase
separates the system from its surroundings?
reaches an equilibrium level and stays there.
A. Division B. Wall
A. Chemical B. Thermal
C. Boundary D. Interface
C. Mechanical D. Phase
11. A system which consists of fixed amount of
26. A system is in ______ equilibrium of its
mass and no mass can cross its boundary called
chemical composition does not change with
_____.
time, i.e., no chemical reaction occurs.
A. Equilibrium system
A. Chemical B. Thermal
B. Thermal equilibrium system
C. Mechanical D. Phase
C. Open system
27. “The state of a simple compressible system
D. Closed system
12. A system in which even energy is not allowed is completely specified by two independent,
to cross the boundary is called ____. intensive properties”. This is known as
A. Closed system B. Exclusive system ______.
C. Isolated system D. Special system A. Equilibrium postulate
13. A system in which there is a flow of mass is B. State postulate
known as _____. C. Environment postulate
D. Compressible system postulate
28. What is the unit of the total energy of the D. No change with mass
system? 43. What does the tem “uniform” implies?
A. Kj B. Kj/Kg A. No change with volume
C. Kg D. g B. No change with time
29. Without electrical, mechanical, C. No change with location
gravitational, surface tension and motion D. No change with mass
effects, a system is called _____ system. 44. What is defined as a process during which a
A. Simple B. Simple compressible fluid flows through a control volume steadily?
C. Compressible D. Independent A. Transient-flow process
30. What refers to any change that a system B. Steady and uniform process
undergoes from one equilibrium state to C. Uniform-flow process
another equilibrium state? D. Steady-flow process
A. Process B. Path 45. The sum of all the microscopic form of energy
C. Phase D. Cycle is called _____.
31. What refers to the series of state through A. Total energy B. Internal energy
which a system passes during a process? C. System energy D. Phase energy
A. Path B. Phase 46. 46. What type of system energy is related to
C. Cycle D. Direction the molecular structure of a system?
32. How many independent properties are required A. Macroscopic form of energy
to completely fix the equilibrium state of a B. Microscopic form of energy
pure gaseous compound? C. Internal energy
A. 4 B. 3 D. External energy
C. 2 D. 1 47. 47. What form of energy refers to those a
33. What is a process in which the system remains system possesses as a whole with respect to
infinitesimally closed to an equilibrium state some outside reference frame, such as
at all times? potential and kinetic energies?
A. Path equilibrium process A. Macroscopic form of energy
B. Cycle equilibrium process B. Microscopic form of energy
C. Phase equilibrium process C. Internal energy
D. Quasi-state or quasi- equilibrium process D. External energy
34. A closed system may refer to ______. 48. Who coined the word “energy” in 1807?
A. Control mass B. Control volume A. William Rankine B. Rudolph Clausius
C. Control energy D. Control temperature C. Lord Kelvin D. Thomas Young
35. An open system may refer to ______. 49. The molecules of a gas moving through space
A. Control mass B. Control volume with some velocity possesses what kind of
C. Control energy D. Control temperature energy?
36. A system is said to be in thermodynamic A. Translational energy
equilibrium if it maintains ______ B. Spin energy
equilibrium. C. Rotational kinetic energy
A. Mechanical and phase D. Sensible energy
B. Thermal and chemical 50. The electrons in an atom which rotate about
C. Thermal, mechanical and chemical the nucleus possess what kind of energy?
D. Thermal, phase, mechanical and chemical A. Translational energy
37. What is a process with identical end states B. Spin energy
called? C. Rotational kinetic energy
A. Cycle B. Path D. Sensible energy
C. Phase D. Either path or phase 51. The electrons which spins about its axis will
38. What is a process during which the temperature possess what kind of energy?
remains constant? A. Translational energy
A. Isobaric process B. Isothermal process B. Spin energy
C. Isochoric process D. Isometric process C. Rotational kinetic energy
39. What is a process during which the pressure D. Sensible energy
remains constant? 52. What refers to the portion of the internal
A. Isobaric process B. Isothermal process energy of a system associated with the kinetic
C. Isochoric process D. Isometric process energies of the molecules?
40. What is a process during which the specific A. Translational energy
volume remains constant? B. Spin energy
A. Isobaric process C. Rotational kinetic energy
B. Isothermal process D. Sensible energy
C. Isochoric or isometric process 53. What is the internal energy associated with
D. Isovolumetric process the phase of a system called?
41. The prefix “iso” used to designate a process A. Chemical energy B. Latent energy
means ______. C. Phase energy D. Thermal energy
A. Cannot be interchanged 54. What is the internal energy associated with
B. Remains constant the atomic bonds in a molecule called?
C. Approximately equal A. Chemical energy B. Latent energy
D. Slight difference C. Phase energy D. State energy
42. What does the term “steady” implies? 55. What is the extremely large amount of energy
A. No change with volume associated with the strong bonds within the
B. No change with time nucleus of the atom itself called?
C. No change with location
 A. Chemical energy B. Latent energy A. Atm B. Bar
C. Phase energy D. Nuclear energy C. Pa D. Psi
56. What are the only two forms of energy 70. 1 bar is equivalent to how many pascals?
interactions associated with a closed system? A. 10^3 B. 10^4
A. Kinetic energy and heat C. 10^5 D. 10^6
B. Heat transfer and work 71. 1 atm is equivalent to how many pascals?
C. Thermal energy and chemical energy A. 101,325 B. 101,689
D. Latent energy and thermal energy C. 101,102 D. 101,812
57. What states that if two bodies are in thermal 72. What is considered as the actual pressure at
equilibrium with a third body, they are also a given position and is measured relative to
in equilibrium with each other? absolute vacuum?
A. Zeroth law of thermodynamics A. Gage pressure B. Absolute pressure
B. First law of thermodynamics C. Atmospheric pressure D. Vacuum pressure
C. Second law of thermodynamics 73. What is the pressure below atmospheric
D. Third law of thermodynamics pressure called?
58. Who formulated the zeroth law of A. Gage pressure B. Absolute pressure
thermodynamics in 1931? C. Atmospheric pressure D. Vacuum pressure
A. A. Celsuis B. A. Einstein 74. The difference between the absolute pressure
C. R.H. Fowler D. G. Fahrenheit and the atmospheric pressure is called the
59. What is the thermodynamic temperature scale _____ pressure.
in the SI system? A. Gage B. Normal
A. Kelvin scale B. Celsius scale C. Standard D. Vacuum
C. Fahrenheit scale D. Rankine scale 75. Which of the following is NOT an instrument
60. What is the thermodynamic temperature scale used to measure pressure?
in the English system? A. Bourdon tube B. Pitot tube
A. Kelvin scale B. Celsius scale C. Aneroid D. Manometer
C. Fahrenheit scale D. Rankine scale 76. What instrument is used to measure atmospheric
61. What temperature scale is identical to the pressure?
Kelvin scale? A. Pitot tube B. Wind vane
A. Ideal gas temperature scale C. Barometer D. Manometer
B. Ideal temperature scale 77. Another unit used to measure atmospheric
C. Absolute gas temperature scale pressure is the “torr”. This is named after
D. Triple point temperature scale the Italian physicist, Evangelista
62. The temperatures of the ideal gas temperature Torrecelli. An average atmospheric pressure
scale are measured by using a ______. is how many torr?
A. Constant-volume gas thermometer A. 740 B. 750
B. Constant-mass gas thermometer C. 760 D. 770
C. Constant-temperature gas thermometer 78. What states that for a confined fluid, the
D. Constant-pressure gas thermometer pressure at a point has the same magnitude in
63. What refers to the strong repulsion between all directions?
the positively charged nuclei which makes A. Avogadro’s Law B. Amagat Law
fusion reaction difficult to attain? C. Pascal’s Law D. Bernoulli’s Theorem
A. Atomic repulsion B. Nuclear repulsion 79. What pressure measuring device consists of a
C. Coulomb repulsion D. Charge repulsion coiled hollow tube that tends to straighten
64. What gas thermometer is based on the principle out when the tube is subjected to an internal
that at low pressure, the temperature of a gas pressure?
is proportional to its pressure at constant A. Aneroid B. Manometer
volume? C. Bourdon pressure gageD. Barometer
A. Constant-pressure gas thermometer 80. What is an energy that can be transferred from
B. Isobaric gas thermometer one object to another causing a change in
C. Isometric gas thermometer temperature of each object?
D. Constant-volume gas thermometer A. Power B. Heat transfer
65. What is the state at which all three phases C. Heat D. Work
of water coexist in equilibrium? 81. What is the SI unit of energy?
A. Tripoint of water A. Newton B. Btu
B. Triple point of water C. Calorie D. Joule
C. Triple phase point of water 82. One joule is equivalent to one _____.
D. Phase point of water A. Kg ∙ m/ s^2 B. Kg ∙ m^2/s^2
66. What is defined as the force per unit area? C. Kg ∙ m^2/s D. Kg ∙ m/s
A. Pressure B. Energy 83. One calorie is equivalent to how many joules?
C. Work D. Power A. 4.448 B. 4.184
67. The unit “pascal” is equivalent to ______. C. 4.418 D. 4.814
A. N/m^2 B. N/m 84. One erg is equivalent to how many joules?
C. N-m D. N-m^2 A. 10^-8 B. 10^-7
68. Which of the following is NOT a value of the C. 10^-6 D. 10^-5
standard atmospheric pressure? 85. 85. The first law of thermodynamics is the:
A. 1 bar B. 1 atm A. Law of conservation of momentum
C. 1 kgf/cm^2 D. 14.223 psi B. Law of conservation of mass
69. What is the SI unit of pressure? C. Law of conservation of power
D. Law of conservation of energy
86. What is the study of energy and its
transformations? A. Equilibrium temperature
A. Thermostatics B. Thermophysics B. Saturation temperature
C. Thermochemistry D. Thermodynamics C. Superheated temperature
87. What is considered as the heat content of a D. Subcooled temperature
system? 101. What refers to the pressure at which a
A. Enthalpy B. Entropy pure substance changes phase at a given
C. Internal heat D. Molar heat temperature?
88. What refers to the amount of heat needed to A. Equilibrium pressure
raise the temperature of an object by one B. Saturation pressure
degree Celsius or 1K? C. Superheated pressure
A. Heat capacity B. Specific heat D. Subcooled pressure
C. Latent heat D. Molar heat 102. What is the amount of heat needed to turn
89. What is the heat capacity of one mole of 1 kg of the substance at its melting point
substance? from the solid to liquid state?
A. Molecular heat B. Specific heat A. Heat of fusion
C. Latent heat D. Molar heat B. Heat of vaporation
90. What is the heat capacity of one gram of a C. Heat of condensation
substance? D. Heat of fission
A. Molecular heat B. Specific heat 103. What is the amount of heat needed to turn
C. Latent heat D. Molar heat 1kg of the substance at its boiling point from
91. “The enthalpy change for any chemical reaction the liquid to the gaseous state?
is independent of the intermediate stages, A. Heat of fusion
provided the initial and final conditions are B. Heat of vaporation
the same for each route.” This statement is C. Heat of condensation
known as: D. Heat of fission
A. Dulong’s Law B. Dalton’s Law 104. What refers to the amount of energy
C. Hess’s Law D. Petit Law absorbed or released during a phase-change
92. What refers to the measure of the disorder process?
present in a given substance or system? A. Molar heat B. Latent heat
A. Enthalpy B. Entropy C. Vaporization heat D. Condensation heat
C. Heat capacity D. Molar heat 105. What is the latent heat of fusion of water
93. Entropy is measured in ______. at 1 atm?
A. Joule/Kelvin B. Joule-Meter/Kelvin A. 331.1 kJ/kg B. 332.6 kJ/kg
C. Meter/Kelvin D. Newton/Kelvin C. 333.7 kJ/kg D. 330.7 kJ/kg
94. What is the energy absorbed during chemical 106. What is the latent heat of vaporization
reaction under constant volume conditions? of water at 1 atm?
A. Entropy B. Ion exchange A. 2314.8 kJ/kg B. 2257.1 kJ/kg
C. Enthalpy D. Enthalpy of reaction C. 2511.7 kJ/kg D. 2429.8 kJ/kg
95. When water exists in the liquid phase and is 107. What refers to the point at which the
not about to vaporize, it is considered as saturated liquid and saturated vapor states
_____liquid. are the same or identical?
A. Saturated A. Triple point B. Inflection point
B. Compressed or subcooled C. Maximum point D. Critical point
C. Superheated 108. What is defined as the direct conversion
D. Unsaturated of a substance from the solid to the vapor
96. A liquid that is about to vaporize is called state or vice versa without passing the liquid
______ liquid. state?
A. Saturated A. Condensation B. Vaporization
B. Compressed or subcooled C. Sublimation D. Cryogenation
C. Superheated 109. The amount of heat required to raise the
D. Unsaturated temperature of 1kg of water through 1 °C is
97. A vapor that is about to condense is called called ______.
______ vapor. A. Calorie B. Joule
A. Saturated C. BTU D. Kilocalorie
B. Compressed or subcooled 110. The amount of heat required to raise the
C. Superheated temperature of 1 pound of water by 1°F is
D. Unsaturated called ______.
98. A vapor that is not about to condense is called A. Calorie B. Joule
_____ vapor. C. BTU D. Kilocalorie
A. Saturated 111. 1 British thermal unit (BTU) is equivalent
B. Compressed or subcooled to how many joules?
C. Superheated A. 1016 B. 1043
D. Unsaturated C. 1023 D. 1054
99. A substance that has a fixed chemical 112. The term “enthalpy” comes from Greek
composition is known as ______ substance. “enthalpen” which means ______.
A. Monoatomic B. Heterogeneous A. Warm B. Hot
C. Homogeneous D. Pure C. Heat D. Cold
100. What refers to the temperature at which a 113. The ratio of the mass of vapor to the
pure substance changes phase at a given total mass of the mixture is called ______.
pressure?
 A. Vapor ratio B. Vapor content 127. What refers to the transfer of energy due
C. Vapor index D. Quality to the emission of electromagnetic waves or
114. The “equation of state” refers to any photons?
equation that relates the ______ of the A. Conduction B. Convection
substance. C. Radiation D. Electrification
A. Pressure and temperature 128. What refers to the transfer of energy
B. Pressure, temperature and specific weight between a solid surface and the adjacent fluid
C. Temperature and specific weight that is in motion?
D. Pressure, temperature and specific volume A. Conduction B. Convection
115. In the equation Pv = RT, the constant of C. Radiation D. Electrification
proportionality R is known as ______. 129. What refers to the transfer of energy from
A. Universal gas constant the more energetic particles of a substance
B. Gas constant to the adjacent less energetic ones as a
C. Ideal gas factor result of interaction between particles?
D. Gas index A. Conduction B. Convection
116. The gas constant of a certain gas is the C. Radiation D. Electrification
ratio of: 130. What states that the net mass transfer to
A. Universal gas constant to molar mass or from a system during a process is equal to
B. Universal gas constant to atomic weight the net change in the total mass of the system
C. Universal gas constant to atomic number during that process?
D. Universal gas constant to number of moles A. Third law of thermodynamics
117. What is the value of the universal gas B. Conservation of energy principle
constant in kJ/kmol ∙ K? C. Second law of thermodynamic
A. 10.73 B. 1.986 D. Conservation of mass principle
C. 8.314 D. 1545 131. Which of the following statements is TRUE
118. The mass of one mole of a substance in for an ideal gas, but not for a real gas?
grams is known as ______. A. PV = nRT
A. Molar weight B. Molar mass B. An increase in temperature causes an
C. Molar volume D. Molar constant increase in the kinetic energy of the gas
119. What is defined as the energy required to C. The total volume of molecules on a gas is
raise the temperature of a unit mass of a nearly the same as the volume of the gas as a
substance by one degree? whole
A. Latent heat of fusion D. No attractive forces exists between the
B. Molar heat molecule of a gas
C. Specific heat capacity 132. How does an adiabatic process compare to
D. Specific heat an isentropic process?
120. The ______ of a substance is the amount A. Adiabatic heat transfer is not equal to
of heat that must be added or removed from a zero; isentropic heat transfer is zero
unit mass of the substance to change its B. Both heat transfer = 0; isentropic:
temperature by one degree. reversible
A. Latent heat of fusion C. Adiabatic heat transfer = 0; isentropic:
B. Molar heat heat transfer is not equal to zero
C. Specific heat capacity D. Both heat transfer is not equal to zero;
D. Specific heat isentropic: irreversible
121. What is the specific heat capacity of 133. Which of the following is the Ideal gas
water in J/kg ∙°C? law (equation)?
A. 4581 B. 4185 A. V/T = K B. V= k*(1/P)
C. 4518 D. 4815 C. P1/T1 = P2/T D. PV = nRT
122. What is the SI unit of specific heat 134. What is a measure of the ability of a
capacity? material to conduct heat?
A. J/kg B. J/kg∙ °F A. Specific heat capacity
C. J/kg∙ °C D. J/°C B. Coefficient of thermal expansion
123. What is constant for a substance that is C. Coefficient of thermal conductivity
considered “incompressible”? D. Thermal conductivity
A. Specific volume of density 135. What refers to the heating of the earth’s
B. Pressure atmosphere not caused by direct sunlight but
C. Temperature by infrared light radiated by the surface and
D. All of the above absorbed mainly by atmospheric carbon dioxide?
124. If there is no heat transferred during the A. Greenhouse effect B. Global warming
process, it is called a ______ process. C. Thermal rise effect D. Ozone effect
A. Static B. Isobaric 136. What is a form of mechanical work which
C. Polytropic D. Adiabatic is related with the expansion and compression
125. The term “adiabatic” comes from Greek of substances?
“adiabatos” which means ______. A. Boundary work B. Thermodynamic work
A. No heat C. Phase work D. System work
B. No transfer 137. Thermal radiation is an electromagnetic
C. Not to be passed radiation with wavelengths in _____ range.
D. No transformation A. 1 to 100 µm B. 0.1 to 100 µm
126. How is heat transferred? C. 0.1 to 10 µm D. 10 to 100 µm
A. By conduction B. By convection 138. What refers to the rate of thermal
C. By radiation D. All of the above radiation emitter per unit area of a body?
 A. Thermal conductivity B. Absorptivity 151. What law states that it is impossible to
C. Emissivity D. Emissive power operate an engine operating in a cycle that
139. What states that for any two bodies in will have no other effect than to extract heat
thermal equilibrium, the ratios of emissive from a reservoir and turn it into an
power to the absorptivity are equal? equivalent amount of work?
A. Kirchhoff’s radiation law A. Zeroth law of thermodynamics
B. Newton’s law of cooling B. First law of thermodynamics
C. Stefan-Boltzmann law C. Second law of thermodynamics
D. Hess’s law D. Third law of thermodynamics
140. What is considered as a perfect absorber 152. Which statement of the second law of
as well as a perfect emitter? thermodynamics states that no heat engine can
A. Gray body B. Black body have a thermal efficiency of 100 percent?
C. Real body D. White body A. Kelvin-Planck statement
141. What is a body that emits a constant B. Clausius statement
emissivity regardless of the wavelength? C. Kevin statement
A. Gray body B. Black body D. Rankine statement
C. Real body D. White body 153. What is the ratio of the useful heat
142. At same temperatures, the radiation extracted to heating value?
emitted by all real surfaces is ______ the A. Combustion efficiency
radiation emitted by a black body. B. Phase efficiency
A. Less than C. Heat efficiency
B. Greater than D. Work efficiency
C. Equal to 154. What is defined as the ratio of the net
D. Either less than or greater than electrical power output to the rate of fuel
143. Which is NOT a characteristic of energy input?
emissivity? A. Combustion efficiency
A. It is high with most nonmetals B. Thermal efficiency
B. It is directly proportional to temperature C. Overall efficiency
C. It is independent with the surface D. Furnace efficiency
condition of the material 155. What refers to the amount of heat removed
D. It is low with highly polished metals from the cooled space in BTS’s for 1 watt-hour
144. What is the emissivity of a black body? of electricity consumed?
A. 0 B. 1 A. Cost efficiency rating
C. 0.5 D. 0.25 B. Energy efficiency rating
145. What is the absorptivity of a black body? C. Coefficient of performance
A. 0 B. 1 D. Cost of performance
C. 0.5 D. 0.25 156. What law states that it is impossible to
146. What is sometimes known as the “Fourth- build a device that operates in a cycle and
power law”? produces no effect other than the transfer of
A. Kirchhoff’s radiation law heat from a lower-temperature body to a
B. Newton’s law of cooling higher-temperature body?
C. Stefan-Boltzmann law A. Zeroth law of thermodynamics
D. Hess’s law B. First law of thermodynamics
147. What states that the net change in the C. Second law of thermodynamics
total energy of the system during a process D. Third law of thermodynamics
is equal to the difference between the total 157. What statement of the second law of
energy entering and the total energy leaving thermodynamics states that it is impossible
the system during that process? to build a device that operates in a cycle and
A. Third law of thermodynamics produces no effect other than the transfer of
B. Conservation of energy principle heat from a lower-temperature body to a
C. Second law of thermodynamics higher-temperature body?
D. Conservation of mass principle A. Kelvin-Planck statement
148. The equation Ein – Eout = ∆Esystem is B. Clausius statement
known as ______. C. Kelvin statement
A. Energy conservation D. Rankine statement
B. Energy equation 158. A device that violates either the first
C. Energy balance law of thermodynamics or the second law of
D. Energy conversion equation thermodynamics is known as _____.
149. What remains constant during a steady-flow A. Ambiguous machine
process? B. Universal machine
A. Mass C. Perpetual-motion machine
B. Energy content of the control volume D. Unique machine
C. Temperature 159. A device that violates the first law of
D. Mass and energy content of the control thermodynamics is called a _____.
volume A. Perpetual-motion machine of the first kind
150. Thermal efficiency is the ratio of: B. Universal machine of the first kind
A. Network input to total heat input C. Ambiguous machine of the first kind
B. Network output to total heat output D. Unique machine of the first kind
C. Network output to total heat input 160. A device that violates the second law of
D. Network input to total heat output thermodynamics is called a ______.
A. Perpetual motion machine of the second kind
 B. Universal machine of the second kind B. First law of thermodynamics
C. Ambiguous machine of the second kind C. Second law of thermodynamics
D. Unique machine of the second kind D. Third law of thermodynamics
161. Carnot cycle is the best known reversible 173. What law provides an absolute reference
cycle which was first proposed in what year? point for the determination of entropy?
A. 1842 B. 1824 A. Zeroth law of thermodynamics
C. 1832 D. 1834 B. First law of thermodynamics
162. Who proposed the Carnot cycle? C. Second law of thermodynamics
A. Sammy Carnot B. Sonny Carnot D. Third law of thermodynamics
C. Sadi Carnot D. Suri Carnot 174. “The entropy change of a system during a
163. The Carnot cycle is composed of how many process is equal to the net entropy transfer
reversible processes? through the system boundary and the entropy
A. 2 B. 3 generated within the system”. This statement
C. 4 D. 5 is known as:
164. The Carnot cycle is composed of ______ A. Entropy generation
processes. B. Entropy change of a system
A. One isothermal and one adiabatic C. Entropy balance relation
B. One isothermal and two adiabatic D. Third law of thermodynamics
C. Two isothermal and one adiabatic 175. What law states that entropy can be
D. Two isothermal and two adiabatic created but it cannot be destroyed?
165. What is the highest efficiency of heat A. Zeroth law of thermodynamics
engine operating between the two thermal B. First law of thermodynamics
energy reservoirs at temperature limits? C. Second law of thermodynamics
A. Ericson efficiency D. Third law of thermodynamics
B. Otto efficiency 176. Entropy is transferred by ______.
C. Carnot efficiency A. Work B. Heat
D. Stirling efficiency C. Energy D. Work and heat
166. What is a heat engine that operates on the 177. During adiabatic, internally reversible
reversible Carnot cycle called? process, what is true about the change in
A. Carnot heat engine entropy?
B. Ideal heat engine A. It is temperature-dependent
C. Most efficient heat engine B. It is always greater than zero
D. Best heat engine C. It is always zero
167. What states that thermal efficiencies of D. It is always less than zero
all reversible heat engines operating between 178. Water boils when:
the same two reservoirs are the same and that A. Its saturated vapor pressure equals to the
no heat engine is more efficient than a atmospheric pressure
reversible one operating between the same two B. Its vapor pressure equals 76cm of mercury
reservoirs? C. Its temperature reaches 212 degree Celsius
A. Ericson principle D. Its vapor pressure is 1 gram per sq. cm
B. Carnot principle 179. Which of the following is standard
C. Otto principle temperature and pressure (STP)?
D. Stirling principle A. 0 degree Celsius and one atmosphere
168. Who discovered the thermodynamic property B. 32 degree Fahrenheit and zero pressure
“Entropy” in 1865? C. 0 degree Kelvin and one atmosphere
A. Zeroth law of thermodynamics D. 0 degree Fahrenheit and zero pressure
B. First law of thermodynamics 180. What is the value of the work done for a
C. Second law of thermodynamics closed, reversible isometric system?
D. Third law of thermodynamics A. Zero B. Positive
169. A process during which entropy remains C. Negative D. Positive or negative
constant is called ______ process 181. “At constant pressure, the volume of a gas
A. Isometric B. Isochoric is inversely proportional to the pressure”.
C. Isobaric D. Isentropic This is known as ______.
170. “A reversible adiabatic process is A. Boyle’s Law B. Charles’s Law
necessarily isentropic but an isentropic C. Gay-Lussac Law D. Ideal gas law
process is not necessarily reversible 182. Which of the following is the mathematical
adiabatic process.” This statement is: representation of the Charles’s law?
A. True A. V1/V2= P2/P1 B. V1/T1=V2/T2
B. False C. V1/T2=V2/T1 D. V1/V2=√P2/√P1
C. May be true and may be false 183. Which of the following is the formula for
D. Absurd thermal resistance?
171. The term “isentropic process” used in A. Thickness of material/ thermal conductivity
thermodynamics implies what? of material
A. Reversible adiabatic process B. 2(thickness of material)/thermal
B. Externally reversible, adiabatic process conductivity of material
C. Internally reversible, adiabatic process C. Thickness of material/ 2(thermal
D. Irreversible adiabatic process conductivity of material)
172. What states that the entropy of a pure D. Thickness of material x thermal
crystalline substance at absolute zero conductivity of material
temperature is zero?
A. Zeroth law of thermodynamics
184. In the process of radiation, energy is 195. The low temperature reservoir of the heat
carried by electromagnetic waves. What is the reservoirs is known as ______.
speed of electromagnetic waves? A. Source reservoir B. Heel reservoir
A. 182,000 miles/second C. Toe reservoir D. Sink reservoir
B. 184,000 miles/second 196. A ______ is a flow in which the gas flow
C. 186,000 miles/second is adiabatic and frictionless and entropy
D. 188,000 miles/second change is zero.
185. For heat engine operating between two A. Isentropic flow B. Isobaric flow
temperatures (T1>T2), what is the maximum C. Steady flow D. Uniform flow
efficiency attainable? 197. What refers to the minimum temperature at
A. Eff = 1 – (T2/T1) which combustion can be sustained?
B. Eff = 1 – (T1/T2) A. Burn temperature B. Kindle temperature
C. Eff = T1 – T2 C. Spark temperature D. Ignition temperature
D. Eff = 1 - (T2/T1)^2 198. What law predicts the dew point of
186. Which one is the correct relation between moisture in the fuel gas?
energy efficiency ratio (EER) and coefficient A. Dalton’s law
of performance (COP)? B. Law of Dulong and Petit
A. EER = 2.34 COP B. EER = 3.24 COP C. Ringelman law
C. EER = 3.42 COP D. EER = 4.23 COP D. Amagat’s law
187. The coefficient of performance (COP) is 199. What law states that one energy from can
the ratio between the: be converted without loss into another form?
A. Power consumption in watts and heat A. Amagat’s law B. Joule’s law
absorbed per hour C. Lussac’s law D. Henry’s law
B. Heat absorbed per hour and the power 200. Which is NOT a correct statement?
consumption in watts A. A superheated vapor will not condense when
C. Work required and the absorbed heat small amount of heat re removed
D. Absorbed heat and work required B. An ideal gas is a gas that is not a
188. What predicts the approximate molar superheated vapor
specific heat at high temperatures from the C. A saturated liquid can absorb as much heat
atomic weight? as it can without vaporizing
A. Third law of thermodynamics D. Water at 1 atm and room temperature is
B. Law of Dulong and Petit subcooled
C. Mollier diagram 201. Thermodynamics is the study of heat and
D. Pressure-enthalpy diagram its transformation which stems from Greek
189. Considering one mole of any gas, the words meaning _________.
equation of state of ideal gases is simply the a. transformation of heat
______ law. b. transformation of energy
A. Gay-Lussac law B. Dulong and Petit c. movement of heat
C. Avogadro’s D. Henry’s d. movement of matter
190. An ideal gas whose specific heats are 202. What is the Si unit for temperature?
constant is called _____. a. Kelvin b. Celsius
A. Perfect gas B. Natural gas c. Fahrenheit d. Rankine
C. Artificial gas D. Refined gas 203. The energy that flows from higher
191. What are the assumptions of the kinetic temperature object to a lower temperature
gas theory? object because of the difference in
A. Gas molecules do not attract each other temperature is called
B. The volume of the gas molecules is a. heat b. temperature
negligible compared to the volume of the gas c. thermodynamics cycle d. energy flow
C. The molecules behave like hard spheres 204. The amount of heat energy per kilogram
D. All of the above that must be added or removed when a substance
192. “The total volume of a mixture of non- changes from one phase to another.
reacting gases is equal to the sum of the a. specific heat b. heat of expansion
partial volumes.” This statement is known as c. latent heat d. useful heat
______. 205. The change in physical size of a substance
A. Law of Dulong and Petit when its temperature changes.
B. Maxwell-Boltzmann law a. intensive property b. extensive property
C. Amagat’s law c. volume expansion d. thermal expansion
D. Avogadro’s law 206. A stress which develops within an object
193. An adiabatic process in which there is no when it attempts to expand or contract in
change in system enthalpy but for which there response to a temperature changes, but cannot,
is a significant decrease in pressure is due to being held rigidly in place.
called _____. a. elongation b. thermal stress
A. Isochoric process B. Isobaric process c. expansion contractiond. thermal expansion
C. Throttling process D. Quasistatic process 207. The energy associated with individual
194. What is defined as the ratio of the change molecules in a gas, liquid or solid.
in temperature to the change in pressure when a. Specific Energy b. Molecular Energy
a real gas is throttled? c. Internal Energy d. Phase Energy
A. Rankine coefficient 208. The heat Q per unit mass per degree change
B. Kelvin coefficient in temperature that must be supplied or
C. Maxwell-Boltzmann coefficient removed to change the temperature of a
D. Joule-Thomson coefficient substance.
 a. Specific Heat Capacity initiating work obtainable from an isothermal,
b. Latent Heat isobaric thermodynamic system.
c. Heat of Transformation a. Du-Pont Potential b. Gibbs free energy
d. Internal Heat c. Rabz-Eccles Energy d. Claussius Energy
209. The pressure of the vapor phase of a 222. All the energy we consume ultimately
substance that is in equilibrium with the becomes _________.
liquid or solid phase. a. heat b. depleted
a. Phase Pressure c. exhausted d. work
b. Equilibrium Vapor Pressure 223. _________is the partial pressure of water
c. Specific Pressure vapor at the existing temperature divided by
d. Equilibrium Phase Pressure the equilibrium vapor pressure of water at the
210. Vapor pressure depends only on _________. existing temperature.
a. pressure b. force a. vacuum pressure b. relative humidity
c. volume d. temperature c. absolute pressure d. vapor pressure
211. A plot of pressure vs. temperature for a 224. _________ is the transition of a given
given substance showing the various phases substance from the solid to the gas phase with
possible for that particular substance. no intermediate liquid stage.
a. Phase diagram b. P-T diagram a. Convection b. Conduction
c. Wein Diagram d. Histogram c. Radiation d. Sublimation
212. _________ is the grand total of all 225. A process in which heat energy is
energies inside a substance. transferred by the flow of fluid.
a. Internal Energy b. Grand Energy a. Convection b. Conduction
c. Atomic Energy d. Elemental Energy c. Radiation d. Sublimation
213. The _________ is defined as the amount of 226. In order to use a substance to make a
heat required to change the temperature of 1 thermometer the substance must _________ with
gram of water by 1 Celsius degree. a temperature change.
a. specific heat b. latent heat a. expand b. contract
c. Joule d. calorie c. change d. increase
214. _________ is a measure of the average 227. For most solids, the coefficient of volume
kinetic energy per molecule in a substance. expansion is _________ the coefficient of
a. movement b. temperature linear expansion.
c. heat d. mass a. unrelated to b. proportional to
215. _________ the very small KE still present c. twice d. three times
in molecules at absolute zero temperature. 228. The volume of a given amount of water
a. internal KE _________ as the temperature decreases from
b. Atomic kinetic energy 4˚C to 0˚C.
c. Zero-Point Energy a. decreases b. increases
d. Subliminal Energy c. remains constant d. none of the above
216. Convert the change of temperature from 229. The gas in a constant gas thermometer
20˚C to 30˚C to Kelvin scale. cooled to absolute zero would have _________.
a. 10K b. 293K c. 303K d. 273K a. no volume
217. _________ is a thermodynamic potential b. no pressure
which measures the “useful” work obtainable c. zero temperature at all scales
from a closed thermodynamic system at a d. none of the above
constant temperature and volume. 230. On a day when the partial pressure of
a. useful work water vapor remains constant, what happens as
b. energy consumed the temperature rises?
c. Helmholtz free energy a. the relative humidity increases
d. Kinetic Energy b. the relative humidity decreases
218. 218. How much will the length of a 1.0 km c. the relative humidity remains constant
section of concrete highway change if the d. the air would eventually become saturated
temperature varies from -15˚C in winter to 231. The flow of a fluid when heat is
41˚C in summer? transferred by convection.
a. 0.67 m b. 2.2 m a. placidity b. mass flow
c. 3.1 m d. 0.47 m c. convection current d. heat transfer
219. Two 12 ft. sections of aluminum siding are 232. An idealized perfect absorber and perfect
placed end to end on the outside wall of house. emitter of radiation.
How large a gap should be left between the a. elastic material b. transponder material
pieces to prevent buckling if the temperature c. Teflon d. blackbody
can change by 55˚C? 233. A process by which heat is transferred
a. 0.21 m b. 0.18 m through a material without a bulk movement of
c. 0.31 in d. 0.18 in the material.
220. What is the amount of radiant energy a. Convection b. Conduction
received each second over each square meter c. Radiation d. Emission
that is at right angles to the sun’s rays at 234. Is the amount of a substance that contains
the top of the atmosphere? Avogadro’s number of atoms/molecules.
a. 1400 J b. 6000 J a. mass b. matter
c. 10000 J d. 800 J c. gram-mole d. volume
221. _________ is a thermodynamic potential 235. The distribution of particle speeds in an
that measures the “useful” or process- ideal gas at a given temperature.
a. velocity of propagation
 b. escape velocity 250. An ideal gas is maintained at constant
c. Maxwell speed Distribution temperature. If the pressure on the gas is
d. terminal velocity doubled, the volume is
236. A convection process in which an external a. increased fourfold
device, such as a fan, is used to produce the b. doubled
fluid flow. c. reduced by half
a. Forced Convection d. decreased by a quarter
b. External Convection 251. If the Kelvin temperature of an ideal gas
c. Placid Convection is doubled, what happens to the rms speed of
d. Thermionic Convection the molecules in the gas?
237. A _________ is a quantity whose value at a. it increases by a factor of square root of
any state is independent of the path or 2
process used to reach that state. b. it increases by a factor of 2
a. cycle b. path function c. it increases by factor of 4
c. point function d. process d. none of the above
238. A _________ is a quantity whose value 252. A function of state that is associated
depends on the path followed during a with disorder in the system and environment.
particular change in state. a. enthalpy
a. path function b. point function b. entropy
c. process d. cycle c. law of diminishing return
239. The contact surface shared by both the d. Lenz’ Law
system and the surroundings is called 253. No volume changes occur during this type
_________. of process
a. wall b. boundary a. Isobaric process
c. interface d. intersection b. Isomillimetric process
240. A closed system is also known as c. Isocaloric process
_________. d. Isochoric process
a. isolated system b. closed container 254. The boiling of water into steam in an open
c. control mass d. control volume container is an example of a/an _________
241. Open system is also known as _________. process.
a. isolated system b. closed container a. adiabatic b. isochoric
c. control mass d. control volume c. isobaric d. zero work
242. Liquid hydrogen boils at 17 K. What is the 255. When liquid water is converted to steam
temperature in degrees Celsius? at 100˚C, the entropy of water
a. 290 b. 63 a. increases b. decreases
c. -120 d. -256 c. remains the same d. none of the above
243. When a solid melts, 256. Only energy can cross the boundaries.
a. the temperature of the substance increases. a. Closed system b. Open system
b. the temperature of the substance decreases. c. Isolated system d. Isoenergetic system
c. heat leaves the substance. 257. The temperature at which the vapor
d. heat enters the substance. pressure exactly equals one atm is called
244. How many kilocalories of heat are required _________.
to heat 750 g of water from 35˚C to 55˚C. a. boiling temperature b. normal boiling point
a. 15 b. 1500 c. triple point d. point of infliction
c. 1.5 x 10^4 d. 6.3 x 10^4 258. Mixture of liquid and steam of the same
245. Which of the following does not determine substance in which both are at saturation
the amount of internal energy an object has? temperature.
a. temperature b. amount of material a. dry steam b. current steam
c. type of material d. shape of the object c. wet steam d. aerosol
246. Which of the following have the highest 259. The term _________ is traditionally used
thermal conductivities? to describe steam issuing from condensate
a. liquids receiver vents and open-ended condensate
b. gases discharge lines from steam traps.
c. metals a. dry steam b. wet steam
d. solids other than metals c. phase steam d. flash steam
247. Identical objects of four different 260. Defined as the ratio of weight of dry
materials are heated to the same high steam to the weight of stuff.
temperature. Which of the following would a. dryness fraction b. Vaporization
least likely burn your hand if touched? c. fusion d. super heated steam
a. aluminium b. brass 261. What device measures infrared radiation
c. glass d. concrete below?
248. As we heat a gas at constant pressure, its a. thermocouple b. thermopile
volume c. thermodynamic device d. thermos
a. increases b. decreases 262. When an object undergoes thermal
c. stays the same d. none of the above expansion,
249. The volume of an ideal gas is directly a. any holes in the object expand as well
proportional to its b. any holes in the object remain the same
a. pressure c. mass increases
b. Celsius temperature d. molecular activities would cease
c. Kelvin temperature
d. Fahrenheit temperature
263. _________ is the quantity of heat required a. 62.4 lb b. 9.81 lb
to raise the temperature of one pound of water c. 76 lb d. 760 lb
1 F˚ from 63 ˚F to 64 ˚F. 277. The force per unit length across such a
a. one Joule b. one calorie line in the surface is called _________.
c. one watt d. one BTU a. force per length b. surface tension
264. Boiling temperature of a material is c. Pressure d. Density
dependent on its _________. 278. The speed at which a liquid escapes from
a. volume b. power a vessel through an orifice is given by
c. heat d. pressure _________.
265. Thermos was invented by _________. a. Archimedes Principle
a. Sir Arthur Conan Doyle b. Evangelista’s Law
b. Sir Fredrich the Great c. Torricelli’s Theorem
c. Thomas Edison d. Bernoulli’s Equation
d. Sir James Dewar 279. The process of one substance mixing with
266. Most cooking activities involve _________ another because of molecular motion is called
process. _________.
a. Isochoric b. Isothermal a. diffusion b. viscosity
c. Isobaric d. Isovolumic c. streamline flow d. solution
267. Adiabatic heating and Adiabatic cooling 280. When was the Ninth General Conference on
really means _________ and _________ Weights and Measures decided to abandon
respectively. centigrade and used Celsius Instead?
a. raising the temp and lowering the temp a. 1950 b. 1936
b. maintaining the pressure and changing the c. 1957 d. 1948
temperature 281. _________ is the temperature to which the
c. decreasing the volume and increasing the air must be cooled, at constant pressure, to
pressure produce saturation.
d. lowering the temp and raising the temp a. relative humidity
268. The statement “heat cannot by itself flow b. triple point temperature
from one body into a hotter body” is governed c. dew point
by _________. d. critical point
a. the first law of thermodynamics 282. _________ is a succession of changes that
b. the second law of thermodynamics ends with the return of the body or system to
c. the third law of thermodynamics its initial state.
d. the zeroth law of thermodynamics a. process b. system
269. It is impossible for any process to have c. equilibrium d. cycle
as its sole result the transfer of heat from 283. Intensive properties of a system are
a cooler to a hotter body called _________.
a. Carnot’s statement b. Clausius statement a. Bulk Properties b. Innate Properties
c. Rankine statement d. Gauss statement c. Natural Properties d. Inside Properties
270. _________ is the average distance a 284. In thermodynamics, a throttling process,
molecule moves before colliding with another also called a _________, is a type of
molecule. isenthalpic process where a liquid or gas is
a. mean free path b. path allowance cooled as it passes from a higher pressure
c. compacting factor d. molecular space state to a lower pressure state.
271. Find the pressure due to a column of a. Rankine Process
mercury 74.0 cm high. b. Carnot Cycle
a. 91.80 x 10^3 N/m^2 b. 73.56 x 10^2 N/m^2 c. Joule-Thomson process
c. 9.86 x 10^4 N/m^2 d. 87.2 x 10^4 N/m^2 d. Refrigeration process
272. Roughly what is the total weight of air 285. Gasoline and Diesel Engines are best
in the entire earth? described by the _________.
a. 1 x 10^5 tons b. 2 x 10^6 tons a. Otto Cycle b. Burnign Cycle
c. 6 x 10^15 tons d. 8 x 10^10 tons c. Shikki Cycle d. Shapa R’ Elli Cycle
273. _________ is defined as that equivalent 286. Twenty grams of ice at 0˚C melts to water
to the pressure due to a column of mercury at 0˚C. How much does the entropy of the 20g
76cm long. change in this process?
a. surface pressure a. 30.5 J/K b. 24.6 J/K
b. gage pressure c. 21.3 J/K d. 15.7 J/K
c. standard atmospheric pressure 287. The first law of thermodynamics is based
d. isobaric pressure on which of the following principles?
274. If any external pressure is applied to a a. conservation of mass
confined fluid, the pressure will be increased b. the enthalpy-entropy relationship
at every point in the fluid by the amount of c. action – reaction
the external pressure is known as _________. d. conservation of energy
a. Torricelli’s law b. Barometric law 288. If a system absorbs 500 cal of heat at the
c. Newton’s Second law d. Pascal’s law same time does 400J of work, find the change
275. What type of pressure cannot be used for in internal energy of the system.
Boyle’s Law? a. 1400 J b. 1700 J
a. Atmospheric Pressure b. Gauge Pressure c. 1900 J d. 1500 J
c. Surface Pressure d. Isobaric Pressure 289. A gas is enclosed in a cylinder with a
276. To displace a cubic foot of fresh water, weighted piston as the top boundary. The gas
you need _________ force. is heated and expands from a volume of 0.04
 m3 to 0.10 m3 at a constant pressure of 200
kPa. Find the work done on the system.
a. 5 Kj b. 15 kJ
c. 10 kJ d. 12 kJ
290. A simple steam engine receives steam from
the boiler at 180˚C and exhausts directly into
the air at 100˚C. What is the upper limit of
its efficiency?
a. 11.28 % b. 36.77 %
c. 20.36 % d. 17.66 %
291. Heat which causes a change in temperature
of a substance.
a. Latent heat b. Sensible heat
c. Specific heat d. Heat of Fusion
292. Who coined the term latent heat?
a. John Thompson b. Studey Baker
c. Joe di Maggio d. Joseph Black
293. Which of the following cannot be measured
by a thermometer?
a. Latent Heat b. Sensible Heat
c. Specific Heat d. Heat of Fusion
294. It is generally accepted as a law of
nature that although one may closely approach
0 Kelvin it is impossible actually to reach
it.
a. First Law of thermodynamics
b. Second Law of thermodynamics
c. Third Law of thermodynamics
d. Zeroth Law of thermodynamics
295. One calorie is equal to _________.
a. 1/180 W.h b. 1/860 W.h
c. 1/360 W.h d. 1/250 W.h
296. A _________ is a reversible process in
which there is transfer of heat and takes
place according to the relation pVn = C where
n is any constant.
a. Polytropic process b. Entropy
c. Ideal Gas Law d. Carnot Cycle
297. The flow through an open system is
_________ if all properties at each point
within the system remain constant with respect
to time.
a. streamline flow b. steady flow
c. constant flow d. algebraic flow
298. The most efficient cycle that can operate
between two constant temperature reservoir is
the _________.
a. Otto Cycle b. Lazare Cycle
c. Isothermal Cycle d. Carnot Cycle
299. The flow energy of 150 L of a fluid passing
a boundary to a system is 110 kJ. Determine
the pressure at this point
a. 733.33 kPa b. 833.33 kPa
c. 933.33 kPa d. 633.33 kPa
300. Who is the father of thermodynamics?
a. Lazare Carnot b. Sadi Carnot
c. William Thompson d. Rudolf Classius