Engineering Thermodynamics
The efficiency of the Carnot cycle may be increased by

Increasing the lowest temperature
Keeping the lowest temperature constant
Decreasing the highest temperature
Increasing the highest temperature

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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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Engineering Thermodynamics
The universal gas constant (or molar constant) of a gas is the product of

Atomic mass of the gas and the gas constant
Molecular mass of the gas and the gas constant
Molecular mass of the gas and the specific heat at constant volume
Molecular mass of the gas and the specific heat at constant pressure

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