Description : 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
Last Answer : Chemical
Description : 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
Last Answer : Thermal, phase, mechanical and chemical
Description : “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
Last Answer : State postulate
Description : 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
Last Answer : Phase
Description : A system is in ______ equilibrium if the temperature is the same throughout the entire system. A. Static B. Thermal C. Mechanical D. Phase
Last Answer : Thermal
Description : What is the temperature when water and vapor are in equilibrium with the atmospheric pressure? a. Ice point b. Steam point c. Critical point d. Freezing point
Last Answer : Steam point
Description : At steam point, the temperature of water and its vapor at standard pressure are: a. Extremes or maximum b. unity c. in equilibrium d. undefined
Last Answer : in equilibrium
Description : What is the temperature when water and vapor are in the equilibrium with the atmospheric pressure? a. Ice point b. Steam point c. Critical point d. Freezing point
Description : __________________ represents the highest pressure and highest temperature at which liquid and vapor can coexist in equilibrium. a) Critical Point b) Boiling Point c) Quality Point d) None of the above
Last Answer : Critical Point
Description : If a system after undergoing a series of processes, returns to the initial state then (a) process is thermodynamically in equilibrium (b) process is executed in closed system cycle (c) its entropy will ... sum of heat and work transfer will be zero (e) no work will be done by the system.
Last Answer : Answer : d
Description : The change that the system that undergoes from one equilibrium state to another is known as a. oath b. process c. enthalpy change d. entropy change
Last Answer : process
Description : 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
Last Answer : Process
Description : _________is the partial pressure of water vapor at the existing temperature divided by the equilibrium vapor pressure of water at the existing temperature. a. vacuum pressure b. relative humidity c. absolute pressure d. vapor pressure
Last Answer : relative humidity
Description : The pressure of the vapor phase of a substance that is in equilibrium with the liquid or solid phase. a. Phase Pressure b. Equilibrium Vapor Pressure c. Specific Pressure d. Equilibrium Phase Pressure
Last Answer : Equilibrium Vapor Pressure
Description : 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
Last Answer : Saturation pressure
Description : 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
Last Answer : Saturation temperature
Description : What is the unique state at which solid, liquid and gaseous phase can go co-exist in equilibrium? a. Triple point b. Critical point c. Boiling point d. Pour point
Last Answer : Triple point
Description : 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
Last Answer : Triple point of water
Description : 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
Last Answer : Closed system
Description : If two systems are in the thermal equilibrium with a third system, then they must be in thermal equilibrium with each other. a. Zeroth Law of Thermodynamics b. First Law of Thermodynamics c. Second Law of Thermodynamics d. Third Law of Thermodynamics
Last Answer : Zeroth Law of Thermodynamics
Description : A state occurs when a system is in equilibrium a. Natural Environment b. Closed System c. Surrounding d. Isentropic
Last Answer : Natural Environment
Description : ________ is a succession of changes that ends with the return of the body or system to its initial state. a. process b. system c. equilibrium d. cycle
Last Answer : cycle
Description : 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 quasiequilibrium process
Last Answer : Quasi-state or quasi- equilibrium process
Description : 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
Last Answer : Open system
Description : Zeroth law of thermodynamics (a) deals with conversion of mass and energy (b) deals with reversibility and irreversibility of process (c) states that if two systems are both in equilibrium with a ... in thermal equilibrium with each other (d) deals with heat engines (e) does not exist.
Last Answer : Answer : c
Description : “At constant pressure, the volume of a gas is inversely proportional to the pressure”. This is known as ______. A. Boyle’s Law B. Charles’s Law C. Gay-Lussac Law D. Ideal gas law
Last Answer : Boyle’s Law
Description : 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
Last Answer : Pressure, temperature and specific volume
Description : 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
Last Answer : Constant-volume gas thermometer
Description : A ______ is a flow in which the gas flow is adiabatic and frictionless and entropy change is zero. A. Isentropic flow B. Isobaric flow C. Steady flow D. Uniform flow
Last Answer : Isentropic flow
Description : 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
Last Answer : Specific heat capacity
Description : At Equilibrium, the radiation emitted must equal the radiation absorbed. a. Boyle’s Law b. Planck’s Law c. Kirchoff’s Law d. Joule’s Law
Last Answer : Kirchoff’s Law
Description : 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
Last Answer : 2
Description : A vessel with a volume of cubic meter contains liquid water and water vapor ion equilibrium at 600 kPa. The liquid water has mass of1kg. Using the steam table, calculate the mass of the water vapor. A. 0.99kg B. 1.57 kg C ... / kg vg = 0.3157 m^3 / kg Vtot = mƒ vƒ + mg vg mg = (tot-mƒ vƒ) / vg
Last Answer : 3.16 kg
Description : 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
Last Answer : Kirchhoff’s radiation law
Description : 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
Last Answer : Zeroth law of thermodynamics
Description : 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
Description : When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called A. Zeroth law of thermodynamics B. First law of thermodynamics C. Second law of thermodynamics D. Kelvin Planck’s law
Last Answer : A. Zeroth law of thermodynamics
Description : An adiabatic process in which there is no change in system enthalpy but for which there is a significant decrease in pressure is called _____. A. Isochoric process B. Isobaric process C. Throttling process D. Quasistatic process
Last Answer : Throttling process
Description : The term “adiabatic” comes from Greek “adiabatos” which means ______. A. No heat B. No transfer C. Not to be passed D. No transformation
Last Answer : Not to be passed
Description : If there is no heat transferred during the process, it is called a ______ process. A. Static B. Isobaric C. Polytropic D. Adiabatic
Last Answer : Adiabatic
Description : Is a steady flow process at total constant pressure through a control volume for which there is no heat? a. Adiabatic Saturation Process b. Dew point c. Adiabatic Ratio d. None of the above
Last Answer : Adiabatic Saturation Process
Description : The equation Ein – Eout = E∆ system is known as ______. A. Energy conservation B. Energy equation C. Energy balance D. Energy conversion equation
Last Answer : Energy balance
Description : An open system may refer to ______. A. Control mass B. Control volume C. Control energy D. Control temperature
Last Answer : Control volume
Description : A closed system may refer to ______. A. Control mass B. Control volume C. Control energy D. Control temperature
Last Answer : Control mass
Description : An automobile tire has a gauge pressure of 200 kpa at 0°C assuming no air leaks and no change of volume of the tire, what is the gauge pressure at 35ºC. a. 298.645 b. 398.109 c. 291.167 d. 281.333 Pg = Pabs - Patm
Last Answer : 298.645
Description : The flow energy of 5 ft3 of a fluid passing a boundary to a system is 80,000 ft-lb. Determine the pressure at this point. a. 222 psi b. 333 psi c. 444 psi d. 111 psi formula: Ef= pV
Last Answer : 111 psi
Description : 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
Last Answer : 733.33 kPa
Description : Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant (a) pressure (b) temperature (c) volume (d) internal energy (e) entropy.
Description : Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant (a) pressure (b) temperature (c) volume (d) internal energy (e) entropy.
Last Answer : Answer : a
Description : Change in enthalpy of a system is the heat supplied at (a) constant pressure (b) constant temperature (c) constant volume (d) constant entropy (e) N.T.P. condition.