Description : The term “enthalpy” comes from Greek “enthalpen” which means ______. A. Warm B. Hot C. Heat D. Cold
Last Answer : Heat
Description : The term “thermodynamics” comes from Greek words “therme” and “dynamis” which means _______. A. Heat power B. Heat transfer C. Heat energy D. Heat motion
Last Answer : Heat power
Description : Thermodynamics is the study of heat and its transformation which stems from Greek words meaning _________. a. transformation of heat b. transformation of energy c. movement of heat d. movement of matter
Last Answer : movement of heat
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 : The process that has no heat transfer a. Density b. Isentropic Process c. Isometric Process d. Adiabatic
Description : When the expansion of compression of gas takes place without transfer of heat to or from the gas the process is called a. reversible b. adiabatic c. polytropic d. isothermal
Last Answer : adiabatic
Description : When the expansion of compression of gas takes place without transfer of heat or from the gas the process is called; a. Isometric process b. Isothermal process c. Isobaric process d. Adiabatic process
Last Answer : Adiabatic process
Description : 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 ... is not equal to zero D. Both heat transfer is not equal to zero; isentropic: irreversible
Last Answer : Both heat transfer = 0; isentropic: reversible
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 Carnot cycle is composed of ______ processes. A. One isothermal and one adiabatic B. One isothermal and two adiabatic C. Two isothermal and one adiabatic D. Two isothermal and two adiabatic
Last Answer : Two isothermal and two adiabatic
Description : The processes occuring in open system which permit the transfer of mass to and from the system, are known as A.flow processes B.non-flow processes C.adiabatic processes D.none of these
Last Answer : Answer: A
Description : One for which no heat is gained or lost a. Isentropic b. Adiabatic c. Isothermal d. Polytropic
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 : An adiabatic process is one in which A.no heat enters or leaves the gas B.the temperature of the gas changes C.the change in internal energy is equal to the mechanical workdone D.all of the above
Last Answer : Answer: D
Description : Adiabatic heating and Adiabatic cooling really means _________ and _________ respectively. a. raising the temp and lowering the temp b. maintaining the pressure and changing the temperature c. decreasing the volume and increasing the pressure d. lowering the temp and raising the temp
Last Answer : raising the temp and lowering the temp
Description : A heat exchange process in which the product of pressure and volume remains constant is known as (a) heat exchange process (b) throttling process (c) isentropic process (d) adiabatic process (e) hyperbolic process.
Last Answer : Answer : e
Description : Study of transformation of heat energy to mechanical energy to other forms of energy. a. Thermodynamics b. Physics c. Mechanics d. None of the above
Last Answer : Thermodynamics
Description : The heat Q per unit mass per degree change in temperature that must be supplied or removed to change the temperature of a substance. a. Specific Heat Capacity b. Latent Heat c. Heat of Transformation d. Internal Heat
Last Answer : Specific Heat Capacity
Description : The term “isentropic process” used in thermodynamics implies what? A. Reversible adiabatic process B. Externally reversible, adiabatic process C. Internally reversible, adiabatic process D. Irreversible adiabatic process
Last Answer : Internally reversible, adiabatic process
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 : An ideal gas is compressed in a cylinder so well insulated that there is essentially no heat transfer. The temperature of gas a. Remains constant b. increases c. decreases d. is basically zero
Last Answer : increases
Description : What statement of the second law of thermodynamics states that it is impossible to build a device that operates in a cycle and produces no effect other than the transfer of heat from a lower- ... A. Kelvin-Planck statement B. Clausius statement C. Kelvin statement D. Rankine statement
Last Answer : Clausius statement
Description : What law states that it is impossible to build a device that operates in a cycle and produces no effect other than the transfer of heat from a lowertemperature body to a highertemperature body? A. ... B. First law of thermodynamics C. Second law of thermodynamics D. Third law of thermodynamics
Last Answer : Second law of thermodynamics
Description : According to Kelvin-Planck's statement of second law of thermodynamics, A. it is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work B. it ... other than the transfer of heat from a cold body to a hot body D. none of the above
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 : It is a process during which the pressure remains constant a. Adiabatic b. Isentropic c. Isobaric d. Isotropic
Last Answer : Isobaric
Description : Occurring at fixed temperature a. isentropic b. Adiabatic c. Isothermal d. polytropic
Last Answer : Isothermal
Description : A thermodynamic process in which entropy is conserved a. isentropic b. adiabatic c. isothermal d. polytropic
Last Answer : isentropic
Description : Which of the following engines is the most efficient? a. Isobaric expansion b. Adiabatic compression c. Adiabatic expansion d. Isothermal expansion
Last Answer : Isobaric expansion
Description : During the adiabatic process, which of the following is the change in entropy? a. zero b. greater than zero c. less than zero d. infinity
Last Answer : zero
Description : Also called absolute humidity and specific humidity. a. Related humidity b. Humidity ratio c. Dew point d. Adiabatic ratio
Last Answer : Humidity ratio
Description : Is define as the ratio of the actual pressure of the vapor a. Relative Humidity b. Humidity Ratio c. Dew Point d. Adiabatic Saturation
Last Answer : Relative Humidity
Description : Another name of reversible adiabatic process a. Isentropic Process b. Isometric Process c. Isobaric Process d. Isothermal Process
Last Answer : Isentropic Process
Description : An ideal gas of volume 1liter and pressure 10 bar undergoes a quasistatic adiabatic expansion until the pressure drops to 1 bar. Assume γ to be 1.4 what is the final volume? a. 3.18 l b. 4.18 l c. 5.18 l d. 6.18 l
Last Answer : 5.18 l
Description : The boiling of water into steam in an open container is an example of a/an _________ process. a. adiabatic b. isochoric c. isobaric d. zero work
Last Answer : isobaric
Description : During adiabatic, internally reversible process, what is true about the change in entropy? A. It is temperature-dependent B. It is always greater than zero C. It is always zero D. It is always less than zero
Last Answer : It is always zero
Description : “A reversible adiabatic process is necessarily isentropic but an isentropic process is not necessarily reversible adiabatic process.” This statement is: A. True B. False C. May be true and may be false D. Absurd
Last Answer : True
Description : A process, in which the temperature of the working substance remains constant during its expansion or compression, is called A. isothermal process B. hyperbolic process C. adiabatic process D. polytropic process
Description : If the value of n = 0 in the equation pvn = C, then the process is called A. constant volume process B. adiabatic process C. constant pressure process D. isothermal process
Last Answer : Answer: C
Description : Stirling and Ericsson cycles are (a) reversible cycles (b) irreversible cycles (c) quasi-static cycles (d) semi-reversible cycles (e) adiabatic irreversible cycles.
Last Answer : Answer : a
Description : Carnot cycle is (a) a reversible cycle (ft) an irreversible cycle (c) a semi-reversible cycle (d) a quasi static cycle (e) an adiabatic irreversible cycle.
Description : An adiabatic wall is one which (a) prevents thermal interaction (b) permits thermal interaction (c) encourages thermal interaction (d) discourages thermal interaction (e) dos not exist.
Description : For reversible adiabatic process, change in entropy is (a) maximum (b) minimum (c) zero (d) unpredictable (e) negative
Last Answer : Answer : c
Description : Minimum work in compressor is possible when the value of adiabatic index n is equal to (a) 0.75 (b) 1 (c) 1.27 (d) 1.35 (e) 2.
Last Answer : Answer : b
Description : Which of the following processes is irreversible process (a) isothermal (b) adiabatic (c) throttling (d) all of the above (e) none of the above.
Description : Which of the following processes are thermodynamically reversible (a) throttling (b) free expansion (c) constant volume and constant pressure (d) hyperbolic and pV = C (e) isothermal and adiabatic.
Description : If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called (a) free expansion (b) hyperbolic expansion (c) adiabatic expansion (d) parabolic expansion (e) throttling.
Description : If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as (a) free expansion (b) hyperbolic expansion (c) adiabatic expansion (d) parabolic expansion (e) throttling.
Description : The value of n = 1 in the polytropic process indicates it to be (a) reversible process (b) isothermal process (c) adiabatic process (d) irreversible process (e) free expansion process.
Description : Work done in an adiabatic process between a given pair of end states depends on (a) the end states only (b) particular adiabatic process (c) the value of index n (d) the value of heattransferred (e) mass of the system.