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Answers and questions relating to Thermodynamics.
Typology: Exams
2018/2019
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- The term “thermodynamics” comes from Greek words “therme” and “dynamis” which means _______.
- A. Heat power
- B. Heat transfer
- C. Heat energy
- D. Heat motion
- The term “thermodynamics” was first used in 1849 in the publication of a
- A. Rudolph Clausius
- B. William Rankine
- C. Lord Kelvin
- D. Thomas Savery
- What law asserts that energy is a thermodynamic property?
- A. First law of Thermodynamics
- B. Second law of Thermodynamics
- C. Third law of Thermodynamics
- D. Zeroth law of Thermodynamics
- What law asserts that energy has quality as well as quantity?
- A. First law of Thermodynamics
- B. Second law of Thermodynamics
- C. Third law of Thermodynamics
- D. Zeroth law of Thermodynamics
- The macroscopic approach to the study of thermodynamics does not require a knowledge of the behavior of individual particles is called _____.
- A. Dynamic thermodynamics
- B. Static thermodynamics
- C. Statistical thermodynamics
- D. Classical thermodynamics
- What is the more elaborate approach to the study of thermodynamics and based on the average behavior of large groups of individual particles?
- A. Dynamic thermodynamics
- B. Static thermodynamics
- C. Statistical thermodynamics
- D. Classical thermodynamics
- What is defined a region in space chosen for study?
- A. Surroundings
- B. System
- C. Boundary
- D. Volume
- The first law of thermodynamics is based on which of the following principles?
- A. Conservation of mass
- B. Conservation of energy
- C. Action and reaction
- D. The entropy-temperature relationship
- What is the mass or region outside the system called?
- A. Surroundings
- B. Boundary
- C. Volume
- D. Environment
- What is the real or imaginary surface that separates the system from its surroundings?
- A. Division
- B. Wall
- C. Boundary
- D. Interface
- A system which consists of fixed amount of mass and no mass can cross its boundary called _____.
- A. Equilibrium system
- B. Thermal equilibrium system
- C. Open system
- D. Closed system
- A system in which even energy is not allowed to cross the boundary is called ____.
- A. Closed system
- B. Exclusive system
- C. Isolated system
- D. Special system
- A system in which there is a flow of mass is known as _____.
- A. Equilibrium system
- B. Isolated system
- C. Open system
- D. Closed system
- Open system usually encloses which of the following devices?
- A. Compressor
- B. Turbine
- C. Nozzle
- D. All of the above
- The boundaries of a control volume, which may either real or imaginary is called _____.
- A. Control boundary
- B. Control system
- C. Interface
- D. Control surface
- Any characteristic of a thermodynamics system is called a _____.
- A. Property
- B. Process
- C. Phase
- D. Cycle
- How are thermodynamic properties classified?
- A. Physical and chemical
- B. Intensive and extensive
- C. Real and imaginary
- D. Homogeneous and heterogeneous
- The thermodynamic properties that are independent on the size of the system is called _____.
- A. Extensive property
- B. Intensive property
- C. Open property
- D. Closed property
- The thermodynamic properties that are dependent on the size or extent of the system is called _____.
- A. Extensive property
- B. Intensive property
- C. Open property
- D. Closed property
- Which is NOT an intensive property of thermodynamics?
- A. Temperature
- B. Mass
- C. Pressure
- D. Density
- Which is NOT an extensive property of thermodynamics?
- A. Density
- B. Mass
- C. Volume
- D. Energy
- Extensive properties per unit mass are called _____.
- A. Specific properties
- B. Relative properties
- C. Unit properties
- D. Phase properties
- A system is in ______ equilibrium if the temperature is the same throughout the entire system.
- A. Static
- B. Thermal
- C. Mechanical
- D. Phase
- A system is in ______ equilibrium if there is no change in pressure at any point of the system with time.
- A. Pressure
- B. Thermal
- C. Mechanical
- D. Phase
- If a system involves two phases, it is in ______ equilibrium when the mass of each phase reaches an equilibrium level and stays there.
- A. Chemical
- B. Thermal
- C. Mechanical
- D. Phase
- A system is in ______ equilibrium of its chemical composition does not change with time, i.e., no chemical reaction occurs.
- A. Chemical
- B. Thermal
- C. Mechanical
- D. Phase
- “The state of a simple compressible system is completely specified by two independent, intensive properties”. This is known as ______.
- A. Equilibrium postulate
- B. State postulate
- C. Environment postulate
- D. Compressible system postulate
- What is the unit of the total energy of the system?
- A. Kj
- B. Kj/Kg
- C. Kg
- D. g
- Without electrical, mechanical, gravitational, surface tension and motion effects, a system is called _____ system.
- A. Simple
- B. Simple compressible
- C. Compressible
- D. Independent
- What refers to any change that a system undergoes from one equilibrium state to another equilibrium state?
- A. Process
- B. Path
- C. Phase
- D. Cycle
- What refers to the series of state through which a system passes during a process?
- A. Path
- B. Phase
- C. Cycle
- D. Direction
- How many independent properties are required to completely fix the equilibrium state of a pure gaseous compound?
- A. 4
- B. 3
- C. 2
- D. 1
- What is a process in which the system remains infinitesimally closed to an equilibrium state at all times?
- A. Path equilibrium process
- B. Cycle equilibrium process
- C. Phase equilibrium process
- D. Quasi-state or quasi- equilibrium process
- A closed system may refer to ______.
- A. Control mass
- B. Control volume
- C. Control energy
- D. Control temperature
- An open system may refer to ______.
- A. Control mass
- B. Control volume
- C. Control energy
- D. Control temperature
- A system is said to be in thermodynamic equilibrium if it maintains ______ equilibrium.
- A. Mechanical and phase
- B. Thermal and chemical
- C. Thermal, mechanical and chemical
- D. Thermal, phase, mechanical and chemical
- What is a process with identical end states called?
- A. Cycle
- B. Path
- C. Phase
- D. Either path or phase
- What is a process during which the temperature remains constant?
- A. Isobaric process
- B. Isothermal process
- C. Isochoric process
- D. Isometric process
- What is a process during which the pressure remains constant?
- A. Isobaric process
- B. Isothermal process
- C. Isochoric process
- D. Isometric process
- What is a process during which the specific volume remains constant?
- A. Isobaric process
- B. Isothermal process
- C. Isochoric or isometric process
- D. Isovolumetric process
- The prefix “iso” used to designate a process means ______.
- A. Cannot be interchanged
- B. Remains constant
- C. Approximately equal
- D. Slight difference
- What does the term “steady” implies?
- A. No change with volume
- B. No change with time
- C. No change with location
- D. No change with mass
- What does the tem “uniform” implies?
- A. No change with volume
- B. No change with time
- C. No change with location
- D. No change with mass
- What is defined as a process during which a fluid flows through a control volume steadily?
- A. Transient-flow process
- B. Steady and uniform process
- C. Uniform-flow process
- D. Steady-flow process
- The sum of all the microscopic form of energy is called _____.
- A. Total energy
- B. Internal energy
- C. System energy
- D. Phase energy
- What type of system energy is related to the molecular structure of a system?
- A. Macroscopic form of energy
- B. Microscopic form of energy
- C. Internal energy
- D. External energy
- What form of energy refers to those a system possesses as a whole with respect to some outside reference frame, such as potential and kinetic energies?
- A. Macroscopic form of energy
- B. Microscopic form of energy
- C. Internal energy
- D. External energy
- Who coined the word “energy” in 1807?
- A. William Rankine
- B. Rudolph Clausius
- C. Lord Kelvin
- D. Thomas Young
- The molecules of a gas moving through space with some velocity possesses what kind of energy?
- A. Translational energy
- B. Spin energy
- C. Rotational kinetic energy
- D. Sensible energy
- The electrons in an atom which rotate about the nucleus possess what kind of energy?
- A. Translational energy
- B. Spin energy
- C. Rotational kinetic energy
- D. Sensible energy
- The electrons which spins about its axis will possess what kind of energy?
- A. Translational energy
- B. Spin energy
- C. Rotational kinetic energy
- D. Sensible energy
- What refers to the portion of the internal energy of a system associated with the kinetic energies of the molecules?
- A. Translational energy
- B. Spin energy
- C. Rotational kinetic energy
- D. Sensible energy
- What is the internal energy associated with the phase of a system called?
- A. Chemical energy
- B. Latent energy
- C. Phase energy
- D. Thermal energy
- What is the internal energy associated with the atomic bonds in a molecule called?
- A. Chemical energy
- B. Latent energy C. Phase energy D. State energy
- What is the extremely large amount of energy associated with the strong bonds within the nucleus of the atom itself called?
- A. Chemical energy
- B. Latent energy
- C. Phase energy
- D. Nuclear energy
- What are the only two forms of energy interactions associated with a closed system?
- A. Kinetic energy and heat
- B. Heat transfer and work
- C. Thermal energy and chemical energy
- D. Latent energy and thermal energy
- What states that if two bodies are in thermal equilibrium with a third body, they are also in equilibrium with each other?
- A. Zeroth law of thermodynamics
- B. First law of thermodynamics
- C. Second law of thermodynamics
- D. Third law of thermodynamics
- Who formulated the zeroth law of thermodynamics in 1931?
- A. A. Celsuis
- B. A. Einstein
- C. R.H. Fowler
- D. G. Fahrenheit
- What is the thermodynamic temperature scale in the SI system?
- A. Kelvin scale
- B. Celsius scale
- C. Fahrenheit scale
- D. Rankine scale
- What is the thermodynamic temperature scale in the English system?
- A. Kelvin scale
- B. Celsius scale
- C. Fahrenheit scale
- D. Rankine scale
- What temperature scale is identical to the Kelvin scale?
- A. Ideal gas temperature scale
- B. Ideal temperature scale
- C. Absolute gas temperature scale
- D. Triple point temperature scale
- The temperatures of the ideal gas temperature scale are measured by using a ______. A. Constant-volume gas thermometer
- B. Constant-mass gas thermometer
- C. Constant-temperature gas thermometer
- D. Constant-pressure gas thermometer
- What refers to the strong repulsion between the positively charged nuclei which makes fusion reaction difficult to attain?
- A. Atomic repulsion
- B. Nuclear repulsion
- C. Coulomb repulsion
- D. Charge repulsion
- What gas thermometer is based on the principle that at low pressure, the temperature of a gas is proportional to its pressure at constant volume?
- A. Constant-pressure gas thermometer
- B. Isobaric gas thermometer
- C. Isometric gas thermometer
- D. Constant-volume gas thermometer
- What is the state at which all three phases of water coexist in equilibrium?
- A. Tripoint of water
- B. Triple point of water
- C. Triple phase point of water
- D. Phase point of water
- What is defined as the force per unit area?
- A. Pressure
- B. Energy
- C. Work
- D. Power
- The unit “pascal” is equivalent to ______.
- A. N/m^
- B. N/m
- C. N-m
- D. N-m^
- Which of the following is NOT a value of the standard atmospheric pressure?
- A. 1 bar
- B. 1 atm
- C. 1 kgf/cm^
- D. 14.223 psi
- What is the SI unit of pressure?
A. Atm
B. Bar
C. Pa
D. Psi
- 1 bar is equivalent to how many pascals? A. 10^ B. 10^
- C. 10^
- D. 10^
- 1 atm is equivalent to how many pascals?
- A. 101,
- B. 101,
- C. 101,
- D. 101,
- What is considered as the actual pressure at a given position and is measured relative to absolute vacuum?
- A. Gage pressure
- B. Absolute pressure
- C. Atmospheric pressure
- D. Vacuum pressure
- What is the pressure below atmospheric pressure called?
- A. Gage pressure
- B. Absolute pressure
- C. Atmospheric pressure
- D. Vacuum pressure
- The difference between the absolute pressure and the atmospheric pressure is called the _____ pressure.
- A. Gage
- B. Normal
- C. Standard
- D. Vacuum
- Which of the following is NOT an instrument used to measure pressure?
- A. Bourdon tube
- B. Pitot tube
- C. Aneroid
- D. Manometer
- What instrument is used to measure atmospheric pressure?
- A. Pitot tube
- B. Wind vane
- C. Barometer
- D. Manometer
- Another unit used to measure atmospheric pressure is the “torr”. This is named after the Italian physicist, Evangelista Torrecelli. An average atmospheric pressure is how many torr?
- A. 740
- B. 750
- C. 760 D. 770
- What states that for a confined fluid, the pressure at a point has the same magnitude in all directions?
- A. Avogadro’s Law
- B. Amagat Law
- C. Pascal’s Law
- D. Bernoulli’s Theorem
- What pressure measuring device consists of a coiled hollow tube that tends to straighten out when the tube is subjected to an internal pressure?
- A. Aneroid
- B. Manometer
- C. Bourdon pressure gage
- D. Barometer
- What is an energy that can be transferred from one object to another causing a change in temperature of each object?
- A. Power
- B. Heat transfer
- C. Heat
- D. Work
- What is the SI unit of energy?
- A. Newton
- B. Btu
- C. Calorie
- D. Joule
- One joule is equivalent to one _____.
- A. Kg ∙ m/ s^
- B. Kg ∙ m^2/s^
- C. Kg ∙ m^2/s
- D. Kg ∙ m/s
- One calorie is equivalent to how many joules?
- A. 4.
- B. 4.
- C. 4.418 •
- D. 4.
- One erg is equivalent to how many joules?
- A. 10^-
- B. 10^-
- C. 10^-
- D. 10^-
The first law of thermodynamics is the:
- A. Law of conservation of momentum
- B. Law of conservation of mass C. Law of conservation of power
- D. Law of conservation of energy
- What is the study of energy and its transformations?
- A. Thermostatics
- B. Thermophysics
- C. Thermochemistry
- D. Thermodynamics
- What is considered as the heat content of a system?
- A. Enthalpy
- B. Entropy
- C. Internal heat
- D. Molar heat
- What refers to the amount of heat needed to raise the temperature of an object by one degree Celsius or 1K?
- A. Heat capacity
- B. Specific heat
- C. Latent heat
- D. Molar heat
- What is the heat capacity of one mole of substance?
- A. Molecular heat
- B. Specific heat
- C. Latent heat
- D. Molar heat
- What is the heat capacity of one gram of a substance?
- A. Molecular heat
- B. Specific heat
- C. Latent heat
- D. Molar heat
- “The enthalpy change for any chemical reaction is independent of the intermediate stages, provided the initial and final conditions are the same for each route.” This statement is known as:
- A. Dulong’s Law
- B. Dalton’s Law
- C. Hess’s Law
- D. Petit Law
- What refers to the measure of the disorder present in a given substance or system?
A. Enthalpy
B. Entropy
C. Heat capacity
D. Molar heat
- Entropy is measured in ______. A. Joule/Kelvin
- B. Joule-Meter/Kelvin
- C. Meter/Kelvin
- D. Newton/Kelvin
- What is the energy absorbed during chemical reaction under constant volume conditions?
- A. Entropy
- B. Ion exchange
- C. Enthalpy
- D. Enthalpy of reaction
- When water exists in the liquid phase and is not about to vaporize, it is considered as _____liquid.
- A. Saturated
- B. Compressed or subcooled
- C. Superheated
- D. Unsaturated
- A liquid that is about to vaporize is called ______ liquid.
- A. Saturated
- B. Compressed or subcooled
- C. Superheated
- D. Unsaturated
- A vapor that is about to condense is called ______ vapor.
- A. Saturated
- B. Compressed or subcooled
- C. Superheated
- D. Unsaturated
- A vapor that is not about to condense is called _____ vapor.
- A. Saturated
- B. Compressed or subcooled
- C. Superheated
- D. Unsaturated
- A substance that has a fixed chemical composition is known as ______ substance.
- A. Monoatomic
- B. Heterogeneous
- C. Homogeneous
- D. Pure
- What refers to the temperature at which a pure substance changes phase at a given pressure?
- A. Equilibrium temperature
- B. Saturation temperature
- C. Superheated temperature
D. Subcooled temperature
- What refers to the pressure at which a pure substance changes phase at a given temperature?
- A. Equilibrium pressure
- B. Saturation pressure
- C. Superheated pressure
- D. Subcooled pressure
- What is the amount of heat needed to turn 1 kg of the substance at its melting point from the solid to liquid state?
- A. Heat of fusion
- B. Heat of vaporation
- C. Heat of condensation
- D. Heat of fission
- What is the amount of heat needed to turn 1kg of the substance at its boiling point from the liquid to the gaseous state?
- A. Heat of fusion
- B. Heat of vaporation
- C. Heat of condensation
- D. Heat of fission
- What refers to the amount of energy absorbed or released during a phase-change process?
- A. Molar heat - **B. Latent heat** - C. Vaporization heat - D. Condensation heat - What is the latent heat of fusion of water at 1 atm?
- A. 331.1 kJ/kg - B. 332.6 kJ/kg - **C. 333.7 kJ/kg •** D. 330.7 kJ/kg - What is the latent heat of vaporization of water at 1 atm?
- A. 2314.8 kJ/kg - **B. 2257.1 kJ/kg** - C. 2511.7 kJ/kg - D. 2429.8 kJ/kg - What refers to the point at which the saturated liquid and saturated vapor states are the same or identical?
- A. Triple point - B. Inflection point - **C. Maximum point** - D. Critical point - What is defined as the direct conversion of a substance from the solid to the vapor state or vice versa without passing the liquid state?
- A. Condensation - B. Vaporization
- C. Sublimation
- D. Cryogenation
- The amount of heat required to raise the temperature of 1kg of water through 1 °C is called ______.
- A. Calorie
- B. Joule
- C. BTU
- D. Kilocalorie
- The amount of heat required to raise the temperature of 1 pound of water by 1°F is called ______.
- A. Calorie
- B. Joule
- C. BTU
- D. Kilocalorie
- 1 British thermal unit (BTU) is equivalent to how many joules?
- A. 1016
- B. 1043
- C. 1023
- D. 1054
- The term “enthalpy” comes from Greek “enthalpen” which means ______.
- A. Warm
- B. Hot
- C. Heat
- D. Cold
- The ratio of the mass of vapor to the total mass of the mixture is called ______.
- A. Vapor ratio
- B. Vapor content
- C. Vapor index
- D. Quality
- The “equation of state” refers to any equation that relates the ______ of the substance.
- A. Pressure and temperature
- B. Pressure, temperature and specific weight
- C. Temperature and specific weight
- D. Pressure, temperature and specific volume
- In the equation Pv = RT, the constant of proportionality R is known as ______.
- A. Universal gas constant
- B. Gas constant
- C. Ideal gas factor
- D. Gas index
- The gas constant of a certain gas is the ratio of:
- **A. Universal gas constant to molar mass** - B. Universal gas constant to atomic weight - C. Universal gas constant to atomic number - D. Universal gas constant to number of moles - What is the value of the universal gas constant in kJ/kmol ∙ K?
- A. 10. - B. 1. - **C. 8.** - D. 1545 - The mass of one mole of a substance in grams is known as ______.
- A. Molar weight - **B. Molar mass** - C. Molar volume - D. Molar constant - What is defined as the energy required to raise the temperature of a unit mass of a substance by one degree?
- A. Latent heat of fusion - B. Molar heat - C. Specific heat capacity - **D. Specific heat** - The ______ of a substance is the amount of heat that must be added or removed from a unit mass of the substance to change its temperature by one degree.
- A. Latent heat of fusion - B. Molar heat - **C. Specific heat capacity** - D. Specific heat - What is the specific heat capacity of water in J/kg ∙°C?
- A. 4581 - **B. 4185** - C. 4518 • - D. 4815 - What is the SI unit of specific heat capacity?
- A. J/kg - B. J/kg∙ °F - **C. J/kg∙ °C** - D. J/°C - What is constant for a substance that is considered “incompressible”?
- A. Specific volume of density
- B. Pressure
- C. Temperature
- D. All of the above
- If there is no heat transferred during the process, it is called a ______ process.
- A. Static - B. Isobaric - C. Polytropic - **D. Adiabatic** - The term “adiabatic” comes from Greek “adiabatos” which means ______.
- A. No heat - B. No transfer - **C. Not to be passed** - D. No transformation - How is heat transferred?
- A. By conduction - B. By convection - C. By radiation - **D. All of the above** - What refers to the transfer of energy due to the emission of electromagnetic waves or photons?
- A. Conduction - B. Convection - **C. Radiation** - D. Electrification - What refers to the transfer of energy between a solid surface and the adjacent fluid that is in motion?
- A. Conduction - **B. Convection** - C. Radiation - D. Electrification - What refers to the transfer of energy from the more energetic particles of a substance to the adjacent less energetic ones as a result of interaction between particles?
- **A. Conduction** - B. Convection - C. Radiation - D. Electrification - What states that the net mass transfer to or from a system during a process is equal to the net change in the total mass of the system during that process?
- A. Third law of thermodynamics - B. Conservation of energy principle - C. Second law of thermodynamic - **D. Conservation of mass principle** - Which of the following statements is TRUE for an ideal gas, but not for a real gas?
- A. PV = nRT
- B. An increase in temperature causes an increase in the kinetic energy of the gas
- C. The total volume of molecules on a gas is nearly the same as the volume of the gas as a whole
- D. No attractive forces exists between the molecule of a gas
- How does an adiabatic process compare to an isentropic process?
- A. Adiabatic heat transfer is not equal to zero; isentropic heat transfer is zero
- B. Both heat transfer = 0; isentropic: reversible
- C. Adiabatic heat transfer = 0; isentropic: heat transfer is not equal to zero
- D. Both heat transfer is not equal to zero; isentropic: irreversible
- Which of the following is the Ideal gas law (equation)?
- A. V/T = K
- B. V= k*(1/P)
- C. P1/T1 = P2/T2
- D. PV = nRT
- What is a measure of the ability of a material to conduct heat?
- A. Specific heat capacity
- B. Coefficient of thermal expansion
- C. Coefficient of thermal conductivity
- D. Thermal conductivity
- What refers to the heating of the earth’s atmosphere not caused by direct sunlight but by infrared light radiated by the surface and absorbed mainly by atmospheric carbon dioxide?
- A. Greenhouse effect
- B. Global warming
- C. Thermal rise effect
- D. Ozone effect
- What is a form of mechanical work which is related with the expansion and compression of substances?
- A. Boundary work
- B. Thermodynamic work
- C. Phase work
- D. System work
- Thermal radiation is an electromagnetic radiation with wavelengths in _____ range.
- A. 1 to 100 μm
- B. 0.1 to 100 μm
- C. 0.1 to 10 μm
- D. 10 to 100 μm
- What refers to the rate of thermal radiation emitter per unit area of a body?
- A. Thermal conductivity
- B. Absorptivity
- C. Emissivity
- D. Emissive power
- What states that for any two bodies in thermal equilibrium, the ratios of emissive power to the absorptivity are equal?
- A. Kirchhoff’s radiation law •
- B. Newton’s law of cooling
- C. Stefan-Boltzmann law
- D. Hess’s law
- What is considered as a perfect absorber as well as a perfect emitter?
- A. Gray body
- B. Black body
- C. Real body
- D. White body
- What is a body that emits a constant emissivity regardless of the wavelength?
- A. Gray body
- B. Black body
- C. Real body
- D. White body
- At same temperatures, the radiation emitted by all real surfaces is ______ the radiation emitted by a black body.
- A. Less than
- B. Greater than
- C. Equal to
- D. Either less than or greater than
- Which is NOT a characteristic of emissivity?
- A. It is high with most nonmetals
- B. It is directly proportional to temperature
- C. It is independent with the surface condition of the material
- D. It is low with highly polished metals
- What is the emissivity of a black body?
- A. 0
- B. 1
- C. 0.5
- D. 0.25
- What is the absorptivity of a black body?
- A. 0
- B. 1
- C. 0.5
- D. 0.25
- What is sometimes known as the “Fourth-power law”?
A. Kirchhoff’s radiation law • B. Newton’s law of cooling
C. Stefan-Boltzmann law D. Hess’s law
- What states that the net change in the total energy of the system during a process is equal to the difference between the total energy entering and the total energy leaving the system during that process?
- A. Third law of thermodynamics
- B. Conservation of energy principle
- C. Second law of thermodynamics
- D. Conservation of mass principle
- The equation Ein – Eout = ∆Esystem is known as ______.
- A. Energy conservation
- B. Energy equation
- C. Energy balance
- D. Energy conversion equation
- What remains constant during a steady-flow process?
- A. Mass
- B. Energy content of the control volume
- C. Temperature
- D. Mass and energy content of the control volume
- Thermal efficiency is the ratio of:
- A. Network input to total heat input
- B. Network output to total heat output
- C. Network output to total heat input
- D. Network input to total heat output
- What law states that it is impossible to operate an engine operating in a cycle that will have no other effect than to extract heat from a reservoir and turn it into an equivalent amount of work?
- A. Zeroth law of thermodynamics
- B. First law of thermodynamics
- C. Second law of thermodynamics
- D. Third law of thermodynamics
- Which statement of the second law of thermodynamics states that no heat engine can have a thermal efficiency of 100 percent?
- A. Kelvin-Planck statement
- B. Clausius statement
- C. Kevin statement
- D. Rankine statement
- What is the ratio of the useful heat extracted to heating value?
- A. Combustion efficiency
- B. Phase efficiency
- C. Heat efficiency
- D. Work efficiency
- What is defined as the ratio of the net electrical power output to the rate of fuel energy input? A. Combustion efficiency
- B. Thermal efficiency
- C. Overall efficiency
D. Furnace efficiency