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Mechanical Engineering Objective Questions { Thermodynamics }

85. Molecular volume of any perfect gas at 600 x 10^3 N/m2 and 27 C will be
A.4.17 m^3/kg-mol
B.400 m^3/kg-mol
C.0.15 m^3/kg-mol
D.41.7 m^3/kg-mol

86. The more effective way of increasing efficiency of Carnot engine is to
A.Increase higher temperature
B.Decrease higher temperature
C.Increase lower temperature
D.Decrease lower temperature

87. For reversible adiabatic process, change in entropy is

88. Entropy change depends on
A.Heat transfer
B.Mass transfer
C.Change of temperature
D.Thermodynamic state

89. Isochoric process is one in which
A.Free expansion takes place
B.Very little mechanical work is done by the system
C.No mechanical work is done by the system
D.All parameters remain constant

90. Energy can neither be created nor destroyed but can be converted from one form to other, is inferred from
A.Zeroth low of thermodynamic
B.First law of thermodynamics
C.Second law to thermodynamics
D.Basic law of thermodynamics

91. 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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