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

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

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Engineering Thermodynamics
Otto cycle consists of

Two constant volume and two isothermal processes
One constant pressure, one constant volume and two isentropic processes
Two constant volume and two isentropic processes
Two constant pressure and two isentropic processes

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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.
Depends on the mass of the system like volume
Is dependent on the path followed and not on the state
Is not dependent on the path followed but on the state

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