Engineering Thermodynamics
For the constant pressure and heat input, the air standard efficiency of gas power cycle is in the order

Diesel cycle, Otto cycle, Dual cycle
Dual cycle, Otto cycle, Diesel cycle
Otto cycle, Diesel cycle, Dual cycle
Dual cycle, Diesel cycle, Otto cycle

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Engineering Thermodynamics
Extensive property of a system is one whose value

Does not depend on the mass of the system, like temperature, pressure, etc.
Is not dependent on the path followed but on the state
Is dependent on the path followed and not on the state
Depends on the mass of the system like volume

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