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 : 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 : _________ is the temperature to which the air must be cooled, at constant pressure, to produce saturation. a. relative humidity b. triple point temperature c. dew point d. critical point
Last Answer : dew point
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 : What law predicts the dew point of moisture in the fuel gas? A. Dalton’s law B. Law of Dulong and Petit C. Ringelman law D. Amagat’s law
Last Answer : Dalton’s law
Description : The volume of a confined gas is held constant, the pressure is directly proportional to the absolute temperature. a. Charle’s Law b. Boyle’s Law c. Joule’s Law d. Specific Heat
Last Answer : Boyle’s Law
Description : According to kinetic theory of gases, the absolute zero temperature is attained when (a) volume of the gas is zero (b) pressure of the gas is zero (c) kinetic energy of the molecules is zero (d) specific heat of gas is zero (e) mass is zero.
Last Answer : Answer : c
Description : Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a (A) Higher dew point (B) Higher absolute (specific) humidity (C) Higher relative humidity (D) Higher wet bulb temperature
Last Answer : (C) Higher relative humidity
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 : 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 : 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 : 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
Last Answer : Answer: A
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 : 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.
Last Answer : Answer : a
Description : A temperature scale whose zero point is absolute zero, the temperature of “0” entropy at which all molecular motion stops. a. Celsius b. Fahrenheit c. Kelvin d. Rankine
Last Answer : Kelvin
Description : _________ the very small KE still present in molecules at absolute zero temperature. a. internal KE b. Atomic kinetic energy c. Zero-Point Energy d. Subliminal Energy
Last Answer : Zero-Point Energy
Description : What law provides an absolute reference point for the determination of entropy? A. Zeroth law of thermodynamics B. First law of thermodynamics C. Second law of thermodynamics D. Third law of thermodynamics
Last Answer : Third law of thermodynamics
Description : 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
Last Answer : Ideal gas temperature scale
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 : One for which no heat is gained or lost a. Isentropic b. Adiabatic c. Isothermal d. Polytropic
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 : Another name of reversible adiabatic process a. Isentropic Process b. Isometric Process c. Isobaric Process d. Isothermal Process
Last Answer : Isentropic Process
Description : The process that has no heat transfer a. Density b. Isentropic Process c. Isometric Process d. Adiabatic
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 : 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 : 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 : 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 : 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 : 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 : “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 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 : 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 : 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 : 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
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 : Stirling and Ericsson cycles are (a) reversible cycles (b) irreversible cycles (c) quasi-static cycles (d) semi-reversible cycles (e) adiabatic irreversible cycles.
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
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.
Last Answer : Answer : e
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 : 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.
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.