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 : 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 : Another name of reversible adiabatic process a. Isentropic Process b. Isometric Process c. Isobaric Process d. Isothermal Process
Last Answer : Isentropic Process
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 : 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.
Last Answer : Answer : b
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 : It is a process during which the pressure remains constant a. Adiabatic b. Isentropic c. Isobaric d. Isotropic
Last Answer : Isobaric
Description : A thermodynamic process in which entropy is conserved a. isentropic b. adiabatic c. isothermal d. polytropic
Last Answer : isentropic
Description : The process that has no heat transfer a. Density b. Isentropic Process c. Isometric Process d. Adiabatic
Last Answer : Adiabatic
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 : PVy = constant, holds good for an isentropic process, which is (A) Reversible and isothermal (B) Isothermal and irreversible (C) Reversible and adiabatic (D) Adiabatic and irreversible
Last Answer : C) Reversible and adiabatic
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.
Last Answer : Answer : c
Description : Occurring at fixed temperature a. isentropic b. Adiabatic c. Isothermal d. polytropic
Last Answer : Isothermal
Description : One for which no heat is gained or lost a. Isentropic b. Adiabatic c. Isothermal d. Polytropic
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 : Ideal process are ________ process a. Irreversible b. Reversible c. Isothermal d. Isometric
Last Answer : Reversible
Description : The free expansion process is __________ non-flow process. A. reversible B. irreversible
Last Answer : Answer: B
Description : The isothermal and isentropic processes are reversible non-flow processes. A. Agree B. Disagree
Last Answer : Answer: A
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 : For reversible adiabatic process, change in entropy is (a) maximum (b) minimum (c) zero (d) unpredictable (e) negative
Description : What refers to the thermodynamic properties which are independent on the amount of the substance present? a. Extensive property b. Intensive properties c. Reversible properties d. Irreversible properties
Last Answer : Intensive properties
Description : What refers to the thermodynamic properties which are dependent on the amount of the substance present? a. Extensive property b. Intensive properties c. Reversible properties d. Irreversible properties
Last Answer : Extensive property
Description : A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as A. reversible cycle B. irreversible cycle C. thermodynamic cycle D. none of these
Last Answer : Answer: C
Description : Stirling and Ericsson cycles are A. reversible cycles B. irreversible cycles C. semi-reversible cycles D. quasi-static cycles
Description : Carnot cycle has maximum efficiency for (a) reversible engine (b) irreversible engine (c) new engine (d) petrol engine (e) diesel engine.
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 : There are 1.36 kg of gas, for which R = 377 J/kg.k and k = 1.25, that undergo a nonflow constant volume process from p1 = 551.6 kPa and t1 = 60°C to p2 = 1655 kPa. During the process the gas is internally stirred and ... (Formula: T2= T1p2/ p1) a. 999 K b. 888 K c. 456 K d. One of the above
Last Answer : 999 K
Description : A state occurs in isentropic process a. The change in entropy is 0 b. The change in entropy is 1 c. The change in enthalpy is 0 d. The change in enthalpy is 1
Last Answer : The change in entropy is 0
Description : A process during which entropy remains constant is called ______ process A. Isometric B. Isochoric C. Isobaric D. Isentropic
Last Answer : Isentropic
Description : During which of the following process does heat rejection takes place in Carnot cycle? A. Isothermal expansion B. Isentropic expansion C. Isothermal compression D. Isentropic compression
Description : The index of compression n tends to reach ratio of specific heats y when (a) flow is uniform and steady (b) process is isentropic (c) process is isothermal (d) process ... specific heat does not change with temperature (e) process is isentropic and specific heat changes with temperature.
Last Answer : Answer : d
Description : What is another term used for isometric processes? a. Isochoric process b. Iolytropic process c. Isothermal process d. Reversible process
Last Answer : Isochoric process
Description : 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
Last Answer : No change with time
Description : The term “thermodynamics” was first used in 1849 in the publication of a A. Rudolph Clausius B. William Rankine C. Kelvin D. Thomas Savery
Last Answer : Kelvin
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 : The constant pressure, constant volume and constant pvn processes are regarded as irreversible process. A. True B. False
Description : The entropy __________ in an irreversible cyclic process. A. remains constant B. decreases C. increases
Description : There is a loss of heat in an irreversible process. A.True B.False
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 : Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle A. combustion is at constant volume B. expansion and compression are isentropic C. maximum temperature is higher D. heat rejection is lower
Last Answer : Answer: D
Description : The dual combustion cycle consists of one constant pressure, two constant volume and two isentropic processes. A. Agree B. Disagree
Description : A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as A.Carnot cycle B.Stirling cycle C.Otto cycle D.Diesel cycle
Description : Generation of heat by friction is an example of a/an __________ change. (A) Isothermal (B) Irreversible (C) Adiabatic (D) Reversible
Last Answer : (B) Irreversible
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 : In thermodynamics, a throttling process, also called a _________, is a type of isenthalpic process where a liquid or gas is cooled as it passes from a higher pressure state to a lower pressure state. a. Rankine Process b. Carnot Cycle c. Joule-Thomson process d. Refrigeration process
Last Answer : Joule-Thomson process
Description : The entropy change of a system during a process is equal to the net entropy transfer through the system boundary and the entropy generated within the system . This statement is known as: A. Entropy ... B. Entropy change of a system C. Entropy balance relation D. Third law of thermodynamics
Last Answer : Entropy balance relation
Description : 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 ... Conservation of energy principle C. Second law of thermodynamics D. Conservation of mass principle
Last Answer : Conservation of energy principle
Description : 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
Last Answer : Conservation of mass principle
Description : Any characteristic of a thermodynamics system is called a _____. A. Property B. Process C. Phase D. Cycle
Last Answer : Property