127. According to Clausius statement of second law of thermodynamics
A.Heat cant be transferred from low temperature source to high temperature source
B.Heat can be transferred for low temperature to high temperature source by using refrigeration cycle
C.Heat can be transferred from low temperature to high temperature source if COP of process is more than unity
D.Heat cant be transferred from low temperature to high temperature source without the aid of external energy

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128. Which of the following is an irreversible cycle
A.Carnot
B.Stirling
C.None of the above
D.All of the above

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129. Thermal power plant works on
A.Carnot cycle
B.Joule cycle
C.Rankine cycle
D.Otto cycle

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130. Otto cycle consists of following four processes
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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131. For same compression ratio and for same heat added
A.Otto cycle is more efficient than Diesel cycle
B.Diesel cycle is more efficient than Otto cycle
C.Efficiency depends on other factors
D.Both Otto and Diesel cycles are equally efficient

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132. The efficiency of a Carnot engine depends on
A.Working substance
B.Design of engine
C.Temperatures of source and sink
D.Type of fuel fired

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133. The efficiency of Carnot cycle is maximum for
A.Gas engine
B.Well lubricated engine
C.Reversible engine
D.Steam engine

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