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Engineering Thermodynamics

Engineering Thermodynamics
Which law states that the specific heat of a gas remains constant at all temperatures and pressures?

Charles' Law
Joule's Law
Regnault's Law
Boyle's Law

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Engineering Thermodynamics
The main cause for the irreversibility is

All of these
Mechanical and fluid friction
Heat transfer with a finite temperature difference
Unrestricted expansion

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Engineering Thermodynamics
The unit of energy in S.I. units is

Joule
joule/s
watt
joule/m

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Engineering Thermodynamics
According to Regnault's law, the specific heat at constant pressure (cp) and specific heat at constant volume (cv) _________ with the change in pressure and temperature of the gas.

Change
Do not change
None of these
Both (A) and (B)

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Engineering Thermodynamics
Second law of thermodynamics defines

Work
Internal energy
Heat
Entropy

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Engineering Thermodynamics
The thermal efficiency of an ideal gas turbine plant is given by (where r = Pressure ratio)

1 - (1/r) γ/γ - 1
rγ - 1
1 - rγ - 1
1 - (1/r) γ - 1/ γ

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