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THERMODYNAMICS1) A definite area or a space where some where some thermodymic process takesplace is known as

a. thermodynamic system b.thermodynamic cycle c.thermodynamic processd.thermodynamic law2) A closed ststem is one in which heat and work crosses the bondary of the system

but the mass of theworking substance does not crosses the boundary of the systema.yes b.no3) An open system is one in whicha.heat and work crosses the boundary of the system, but the mass of the working

substancesdoes not crosses the boundary of the systemb.mass of the working substance crosses the boundary of the system but the heat and

work doesnot crosses the boundry of the systemc.both the heat and work as well as mass of the working substance crosses the

boundary of the systemd.neither the heat and work nor the mass of the working substace crosses the boundry

of the system4) In an isolated system, neither the heat and work nor the mass of the working

substance crosses theboundry of the systema.true b.false5) In an extensive property of a thermodynamic system

a.extensive heat is transfered b.extensive work is donec.extensive energy is utilised d.none of the avbove6) The thermodynmic property of a steam is said to be an intensive property whose

value forthe entire system---------- the sum of their value for the indivisual parts of the sysyema.is equal to b.is not equal to7) The property of the system ,whose value for the entire system is equal to the sum of

theirvalues for the indivisual parts of the system is called extensive propertya.yes b.no8) Which of the following is the extensive property of a thermodynamic system?a.pressure b.Volume c.Temperature d.Density9) Which of the following is an intensive property of a thermodynamic system?a.volume b.temperature c.mass d.energy10) The specific volume of a system is an ---------property ?a.extensive b .intensive11) The absolute zero Temperature is taken asa.-273 c b.273c c.237c d.-237C12) Which of the following is correct?

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a.Absolute pressure =Gauge pressure + Atmosphere pressureb.Gauge pressure= Absolute pressure + Atmosphere pressurec.Atmosphere pressure = Absolute pressure + Gauge pressured.Absolute pressure = Gauge pressure -Atmosphere pressure13) The standard value of atmosphere pressure taken as sea level is

a.1.013 bar b. 760mmof Hg c.1013*10^2 N/m^2 d.all of the above14) The value of one bar (in s.i unit) is equal toa.1*10^2 N/m^2 b.1*10^3 N/m^2 c.1*10^4 N/m^2 d. 1*10^5 N/m^2

15) The value of 1mm of Hg is equal toa.1.333 N/M^2 b.13.33 N/m^2 c.133.3 N/m^2 d.1333 N/m^216) The reading of the pressure gauge fitted on a vessel is 25 bar . The atmospheric

pressure is 1.03bar and the value of 'g' is 9.81 m/s^2 . The absolute pressure in the vessel isa.23.97 bar b.25 bar c.26.03 bar d.34.81 bar17) The conditions of temperature and pressure at 0 c (273) and760mm of Hg pressure

are termed as ----- temperature and pressure

a.normal b.standard18) The unit of energy is S.I units isa.Joule (J) b.joulemetre(Jm) c.Watt(W) d.Joule/metre(j/m)19) The unit of power in S.i units is Kilowatta.True b.false

20) One kilowatt is equal toa.1 n-m/s b.100N-m c.1000 N-m/s d.1*10^ N-m/s

21) One joule(j) is equal toa.1 n-m b.1KN-m c.10N-m/s d.10 kN-m/s22) The specific heat of water isa .1.817 b.2.512 c.4.187 d.none of the above

23) The numerical value of the thermal capacity and the water equivalent ofthesubstance are thesamea.Agree b.discharge

24) The heat and mechanical energies are mutually convertible . This statement wasestablished bya.Boyle b.Charles c.joule d.none of the these

25) Which of the following statement is correct ?a.The heat and work are boundary phenomena b .The heat and work represent the

energy crossing the boundary of the systemc.The heat and work are path functions d. all of the above26) When two bodies are in thermal equilbrium with a third body, they are also in

thermal equilbrium with each other . This statement is calleda.Zeroth law of thermodynamic b.First law of thermodynamics c.Secondlaw of

thermodynamic d.kelvin planck's law27) First law of thermodynamic deals witha. conservation of heat b.conservation of momentum c.conservation fo mass

d.conservation of energy28) According to First law of thermodynamic

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a.total internal energy of a system during a process remains constantb.total energy of a system remains constant c.workdone by a system is equal to the

heat transfered by the systemd.internal energy ,enthalpy and entropy during a process remains constant

29) Energy can neither can be created nor destroyed , but it can be transformed from

one formto another. This statement is known asa.Zeroth law of thermodynamic b.First law of thermodynamic c.Second law ofthermodynamic d.Kinetic theory of gases30) Kelvin_Planck's law deals witha.conservation of work b.conservation of heat c.conservation of heat into work

d.conservation of work into heat31) The heat and work are mutually convertible . This statement is called ------ law ofthermodynamicsa.Zeroth b.First c.Second32) The measurement of a thermodynamic property known as temperature is based ona.Zeroth law of thermodynamics b.First law of thermodynamic c.Second law of

thermodynamics d.none of the above33) A machine which violates the first law of thermodynamic is known as perpetualmotion machine of the second kinda.correct b.incorrect

34) A perpetual motion machine of the first kind is -------------- according to first law ofthermodynamicsa.possible b.impossible

35) According to Kelvin-planck's statement , a perpetualmotion of the -------------- isimpossible .a.first kind b.second kind

36) Which of the following statement is correct according to Clausis statement of

second law of thermodynamic?a.It is possible to transfer heat from a body at alower temperature to a body at a highertemperatureb.It is possible to transfer heat from a body at a lower temperature to bodyat a higher

temperature , without the aid of an external sourcec.It is possible to transfer heat from a body at a lower temperature to body at a higher

temperature by using refrigeration cycle.d. none of the above

37) According to Kelvin-planck's statement of second law of thermodynamicsa. it is possible to construct an engine working on a cyclic process ,whose sole

purpose is to convert heat energy into workb.it is possible to construct an engine working on a cyclic process, whose sole purpose

is to convert heatenergy into workc.it is possible to construct a device which operates in a cyclic process and procuces

no effect other than the transfer of heat froma cold body to hot bodyd.none of the above

38) Which of the following is the correct statement of the second law ofthermodynamics?

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a.It is impossible to construct an engine working on a cyclic process, whose solepurpose is to convert heat energy into workb.It is impossible to transfer heat froma body at a lower temperature to higher

temperature , without the aid of an external sourcec. There is a definite amount of mechanical energy , which can be obtained from a

given quantity of heat energyd. all of the above39) The heat flows from a cold body to hot body with the aid of an external source. Thisstatement is given bya.Kelvin b.joule c.Clausis d.Gay-lussac

40) Second law of thermodynamic definesa. heat b.work c.internal energy d.entropy

41) It is impossible to transfer heat from a body at alower temperature to body at ahigher temperature ,with out the aid of an external source 'a.Correct b.Incorrect

42) It is -------- to construct an engine working on a cyclic process, whose sole purposeis to convert heat energy into worka.possible b. impossible43) In the first law of thermodynamics , the total energy of the system remains

constanta.true b.false

44) The state of a substance whose evaporation from its liquid state is complete, isknown asa . vapour b.perfect gas c.air d.steam

45) the state of a substance whose evaportion from its liquid state is partial ,is known assteam

a.Agree b.Disagree46) The behaviour of superheated vapour is similar to that of ;a.perfect gas b.air c.steam d.ordinary gas

47) The variable which control the physical properties of a perfect gas area.pressure exerted by the gas b.volume occupied by the gas c.temperature of the gas

d.all of these48) The behaviour of a perfect gas ,undergoing any change in the variable which controlphysical properties ,is governed bya. Boyle's law b.Charles's law c.Gay-Lussac law d.all of these

49) The absolute pressure of a given mass of a perfect gas varies inversely as itsvolume , when the temperature remains constant.This statement is knownas Boyle's lawa. yes b. no

50) As per Charles'law the volume of a given mass of perfect gas varies ---------- as itsabsolute temperature , when the absolute pressureremains constanta.directly b.indirectly

51) All perfect gases change in volume by 1/273th of its original volume at 0 c for every1c change in temperature , when the pressure remains constant .

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This statement is calleda.Boyle's law b.Charles's law c.Gay-lussac law d.Joule's

52) According to Gay-lussac law , the absolute pressure of a given mass of a perfectgas varies ---------- as its absolute temperature, when the volume remains constant

a .directly b.indirectly53) The ----------- states that change of internal energy of a perfect gas is directlyproportional to the change of temperaturea.Boyle's law b.Charle's law c.Gay-Lussac law d. Joule's law

54)Equal volumes of all gases , at the same temperature and pressure , contain equalnumber of ,molecules . this statement is called Avogadro's lawa.true b.false

55) For a perfect gas , according to Boyle 'slawa.Pv =constnat ,if Tis kept constant b.v/T =constant if pis kept constantc.p/T = constant ,if v is kept constant d.T/p =constant ,if v is kept constant

56) Select the correct statement as per Charles'law

a .p.v=constant ,if Tis kept constant b.v/T =constant ,if pis kept constantc.p/T = constant ,if v is kept constant d.T/p=constant ,if v is kept constant57) According to Gay-Lussac law for a perfect gas , p/T =constant , if v is kept constanta. true b.False

58) The temperature at which the volume of a gas becomes zero is calleda.absolute scale of temperature b.absolute zero temperaturec.absolute temperature d. none of the above

59) The absolute zero pressure will bea.When molecular momentumof the system becomes zero b.at sea levelc.at the temperature of -273k d.at the centre of the earth

60) Boyle's law states that change of internal energy of a perfect gas is directly

proportional to thechange of temperaturea.Agree b.disagree

61) The absolute pressure of a given mass of a perfect gas varies inversly as its volume, when the temperatureremains constant . this statement is known as Charles's lawa.yes b.no

62) Charles'law states that all perfect gases change in volume by ------------ of its originalvolume at 0c for every 1c change in temperaturewhen pressure remains constanta.1/27th b.1/93th c.1/173th d.1/273th

63) The absolute zero pressure can be attained at a temperature ofa.0c b. 273c c.273k d.none of the above

64) The general gas equation isa.pv= mRT b.pv= RT^m c.pv^m=c d.pv= (RT)^Mwhere p=pressure ,v= volume m= mass T= Absolute temperature and R= Gas

constant65) The value of gas constant (R) in S.I units isa.0.287 J/kgK b.2.87 J/kgK c.28.7 J/kgK d.287 J/kgK

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66) According to Avogadro's lawa.the product of the gas constant and the molecular mass of an ideal gas is constantb.The sum of partial pressure of the mixture of two gases is sum of the twoc.equal volumes of all gases , at the same temperature and pressure , contain equal

number of molecules

d.all of the above67) The molecular mass expressed in gram( i.e 1g -mole) of all gases , at N.T.P,occupies a volume ofa.0.224litres b.2.24 litres c.22.4 litres d.224 litres

68) Which of the following gas has a minimum molecular mass?a.Oxygen b.Nitrogen c.Hydrogen d.Methane

69) According to Avogardo's law , the density of any two gases is ---------- theirmolecular masses,.if the gases are at the same temperature and pressurea.equal to b. directly proportional to c.inversely proportion to

70) The universal gas constant ( or molar constant ) of a gas is the product of

a.molecualr mass of the gas and the gas constantb.atomic mass of the gas and the gas constant c.molecular mass of the gas and thespecific heat at constant pressured.molecular mass of the gas and the specific heat at constant volume

71) In S.I units , the value of the universal gas constant isa.8.314 j/kg mole -k b.83.14 J/kg mole-k c.831.4 J/kg mole-k d. 8314 J/kg mole-K

72) the value of univesal gas constant is same for all gasesa.yes b.no

73) the amount of heat required to raise the temperature of the unit mass of gas throughone degree at constant volume ,is calleda.specific heat at constant volume b.specific heat at constant pressure

c.kilo joule d.none of the these74) The amount of heat required to raise the temperature of unit mass of a gas throughone degree at constant pressure is calledspecific heat at constant pressurea.True b.False

75) The amount of heat required to raise the temperature of 1 kg of water through onekelvin is calleda.specific heat at constant volume b.specific heat at constant pressurec.kilo-joule d.none of these

76) The specific heat at constant volume isa. The amount of heat required to raise the temperature of unit mass of gas through

one degree, at constant pressureb.The amount of heat required to raise the temperature of unit mass of gas through

one degree, at constant volumec.The amount of heat required to raise the temperature of 1 kg of water through one

degree d. any one of the above77) The value of specific heat at constant pressure(Cp) is ------------ that of at constantvolume (Cv)a.less than b.equal to c.more than

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78) When the gas is heated at constant volume, the heat supplieda.increases the internal energy of the gas b.increases the temperature of the gasc.does some external work during expansion d.all of these

79) when the gas is heated at constant pressure ,the heat supplieda.increases the internal energy of thegas b.increases the temperature of thea gas

c.does some external work during expansion d.all of the above80) The universal gas constant of a gas is the product of molecular mass of the gas andthe gas constanta.correct b.incorrect

81) The amount of heat required to raise teh temperature of ----------- water through onedegree is called kilojoulea.1g b.10 g c.100g d.1000g

82) When the gas is heated at constantvolume, the heat supplied increases the internalenergy of the gasa.true b.false

83) Theratio of specific heat at constant pressure (Cp) and specific heat at constant

volume(Cv) is always ------- one.a. equal to b.less than c.greater than84)The heat supplied to the gas at constant volume isa.mR(T2-T1) b.mCv(T2 -T1) c. mCp(T2+T1)where m= mass of the gasCv= Specific heat at constant volume , Cp= Specific heat at constant pressure

T2-T1= Rise in temperature and R= Gas constant85) The sum of internal energy (U) and the product of pressure and volume (p.v) isknown asa.Work done b.entropy c.enthalpy d.none of the above

86) The volumetric or molar specific heat at constant pressure is the product of

a.molecular mass of the gas and the specific heat at constant volumeb.atomic mass of the gas and the gas constant c.molecular mass of the gas and thegas constantd.none of the above

87) The ratio of specific heat at constant pressure (Cp) and specific heat at constantvolume(Cv) isa.equal to one b.less than one c.greater than one d. none of the these

88)The general gas energy equation isa.Q1-2 =dU+W1-2 b.Q1-2 = dU-W1-2 c.Q1-2 = dU/W1-2 d.Q1-2 =dU* W1-2Where Q1-2= heat supplied ,dU= Change in internal energy andW1-2= Workdone in heat units

89) According to Tegnault's law , the specific heat at constant pressure (Cp) andspecific heat atconstant volume(Cv) -------------- with the change in pressure and temperature of the

gasa.change b.do not change

90) Relation between Cp and Cv is given bya.(Cv/Cp)=R b.Cp-Cv=R c.Cv=R/y-1 d.all of these

91) The gas constant (R) is equal to the

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a.sum of two specific heats b.difference of two specific heats c.product of twospecific heats d.ratio of two specific heats92) The value of Cp/Cv for air isa.1 b.1.4 c.1.8 d.2.3

93) Match the correct answer from Group Bfor the statements given in group A

Group A GroupBa.the value of specific heat at constant pressure (A) 1.40for air is

b.The value ofthe gas constant in S.I units is (B) 8314 J/kg mole-Kc.The value of specific heat at constant volume for air is (C) 1.000d.The value of universal gas constant in S.I units is (D) 287 J/kg-ke. The value of adibatic index for air is (E) 0.720

94) When a system changes its state from one equilbrium state to anotherequilbriumstate ,then the pathof successive states through which the system has passed ,is known as

a.thermodynamic law b.thermodynamic process c.thermodynamic cycle d.none ofthese95) The processes occuring in open system which permit the transfer of mass to andfrom the system are known asa. flow processes b.non-flow processes c.adibatic processes d.none of the these

97) which of the following is a reversible non-flow process?a.Isochoric process b.isobaric process c.Hyperbolic process d.all of the above

98) Thefree expansion process is ------------ non flow processa.reversible b. irrversible

99) The isothermal and isentropic processes are reversible non-flow processesa.Agree b.disagree

100) The heat energy stored in the gas and used for raising the temperature of the gasis known asa.external energy b.internal energy c.kinetic energy d.molecular energy

101) When a gas is heated , change takes place ina.pressure b.volume c.temperature d.all of these

102) When a gas is heated at constant volumea.its temperature will increase b.its pressure will increase c.both temperature and

pressure will increased.neither temperature nor pressure will increase103) When a gas is heated at constant pressurea.its temperature will increase b.its volume will increase c.both temperature and

volume will increase d.neither temperature not volume will increase104) The heating of gas at constant volume is governed bya.Boyle's law b.Charles' law c.Gay-Lussac law d.Avogadro's law

105) The heating of gas at constant pressure is governed bya.Boyle's b.Charles'law c.Gay-Lussac law d.Avogadro'slaw

106) When gas is heated at constant pressure , the heat supplied is utilised ina.increasing the internal energy of gas b.doing some external workc.increasing the internal energy of gas and also for doing some external work d. none

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of the above107) A mixture of gas expands from 0.03 m^3 to 0.06 m^3 at constant pressure of 1Mpaand absorbs 84kjof heat during the process .The change in internal energy of the mixture isa. 30KJ b.54 KJ c.84 KJ d.114 KJ

108) The gas constant (R) is equal to the ------------- of two specific heatsa.sum b.difference c.product d.ratio109) The heating and expanding of a gas is called thermodynamic systema.yes b.no

110) When the gas is cooled at constant pressurea.its temperature increases but volume decreases b.its volume increases but

temperature decreasesc.both temperature and volume d.both temperature and volume decreases

111) A process , in which the gas is heated or expanded in such a way that the productof its pressure and volume remains constant is called

a.isothermal process b.hyperbolic process

c.adibatic process d.polytropic process112) The hyperbolic process is governed bya.Boyle's law b.Charles' law c.Gay-Lussac law d. Avogadro's law

113) A process , in which the temperature of the working substance remains constantduring its expansion or compression , is calleda.isothermal process b.hyperbolic process c.adibatic process d.polytropic process

114) The heating of a gas at constant pressure is governed by charles'lawa.True b.False

115) A process , in which the gas is heated or expanded in such a way that product ofits pressure andvolume remains constant , is called isothermal process

a.Yes b.No116) In an isothermal processa.there is no change in temperature b.there is no change in enthalpyc.there isno change in internal energy d. all of these

117) An isothermal process is governed bya.Boyle's law b. charleslaw c.Gay-lussac law d. Avogadro's law

118) The expansion ratio(r) is ratio ofa.V1/V2 b.V2/V1 c.(V1+V2)/V1 d.(V1+V2)/V2where V1= Volume at the begining of the expansion andV2= Volume at the end of expansion

119) A process ,in which the working substances nither recives nor gives out heat to itssurrounding during its expansion or compression ,is calleda.isothermal process b.hyperbolic processc.adibatic process d.polytropic process

120) There is no change in internal energy in an isothermal processa.Correct b.incorrect

122) The general law for the expansion or compression of gases isa.PV=C b.PV=mRT c.PV^n =C d.PV^gamma=c

123) When the expansion or compression takes place according to the law PV^n =C,the

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process is known asa.isothermas process b.adibatic proces c.hyperbolic process d.polytropic process

124) An adibartic process is one in whicha.no heat enters or leaves the gas b.the temperature of the gas changesc.the change in internal energy is equal to the machanical workdone

d.all of the above127) When a fluid is allowed to expand suddenly into a vaccum chamber through anorifice of large dimensions, the process is known as free expansion processa.True b.False

128) Whea a perfect gas is expanded through an aperture of minute dimensionsn theprocess is known asa.isothermal process b.adibatic processc.free expansion process d.throttling process

129) In a free expansion processa.W1-2 =0 b.Q1-2 = 0 c.dU =0 d.all of these

130) The free expansion process is a constant enthalpy process

a.Correct b.Incorrect131) Workdone in afree expansion process isa.zero b.minimum c.maximum d.positive

133) If thevalue of n=0