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Mechanical Engineering Objective Questions { Thermodynamics }



330. When a liquid boils at constant pressure, the following parameter increases
A.Temperature
B.Heat of vaporization
C.Kinetic energy
D.Entropy
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331. Maximum work by an expansion of a gas in a closed system is possible when process takes place at constant
A.Pressure
B.Temperature
C.Volume
D.Enthalpy
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332. Which is false statement about enthalpy
A.Enthalpy is the sum of internal energy and the pressure volume product
B.It is the same as heat transfer during constant pressure process
C.It is the function of specific heat at constant pressure
D.It is the function of specific heat at constant volume
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333. Heat energy stored in the gas and used for raising temperature of a gas is known as
A.Thermal energy
B.Internal energy
C.Molecular energy
D.Enthalpy
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334. According to first law of thermodynamics
A.Work done by a system is equal to heat transferred by the system
B.Total internal energy of a system during a process remains constant
C.Internal energy, enthalpy and entropy during a process remain constant
D.Total energy of a system remains constant
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335. First law of thermodynamics furnishes the relationship between
A.Heat and work
B.Heat, work and properties of the system
C.Various properties of the system
D.Various thermodynamic processes
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336. 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
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