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Mechanical Engineering Objective Questions { Thermodynamics }

148. The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will
C.Remain unchanged
D.Increase/decrease depending on ap-plication
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149. Gas turbine cycle consists of
A.Two isothermals and two isentropics
B.Two isentropics and two constant volumes
C.Two isentropics, one constant volume and one constant pressure
D.Two isentropics and two constant pressures
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150. A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as
A.Carnot cycle
B.Stirling cycle
C.Otto cycle
D.Diesel cycle
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151. The efficiency and work ratio of a simple gas turbine cycle are
B.Very low
D.Very high
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152. The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume, is called
A.Specific heat at constant volume
B.Specific heat at constant pressure
C.Kilo Joule
D.None of these
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153. There is a loss of heat in an irreversible process
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154. 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 work-done
D.All of the above
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