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Mechanical Engineering Objective Questions { Thermodynamics }



99. Addition of heat at constant pressure to a gas results in
A.Raising its temperature
B.Raising its pressure
C.Raising its volume
D.Raising its temperature and doing external work
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100. Measurement of temperature is based on
A.Thermodynamic properties
B.Zeroth law of thermodynamics
C.First law of thermodynamics
D.Second law of thermodynamics
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101. Carnot cycle has maximum efficiency for
A.Reversible engine
B.Irreversible engine
C.New engine
D.Petrol engine
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102. Carnot cycle efficiency depends upon
A.Properties of the medium/substance used
B.Condition of engine
C.Working condition
D.Temperature range of operation
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103. An engine operates between temperatures of 900 °K and T2 and another engine between T2 and 400 °K For both to do equal work, value of T2 will be
A.650°K
B.600°K
C.625°K
D.700°K
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104. Carnot cycle efficiency is maximum when
A.Initial temperature is 0°K
B.Final temperature is 0°K
C.Difference between initial and final temperature is 0°K
D.Final temperature is 0°C
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105. If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly
A.Temperature
B.Enthalpy
C.Internal energy
D.Entropy
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