Engineering Thermodynamics
Otto cycle consists of

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

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Engineering Thermodynamics
Intensive property of a system is one whose value

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

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Engineering Thermodynamics
Which of the following is the correct statement?

Irreversible engines have maximum efficiency.
All the reversible and irreversible engines have the same efficiency.
All the reversible engines have the same efficiency.
All engines are designed as reversible in order to obtain maximum efficiency.

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