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Engineering Thermodynamics

Engineering Thermodynamics
The general law of expansion or compression is pvn = C, The process is said to be hyperbolic, if n is equal to

∝
1
γ

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Engineering Thermodynamics
Which of the following laws is applicable for the behaviour of a perfect gas?

Boyle's law
Gay Lussac’s law
All of these
Charles ‘law

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Engineering Thermodynamics
The main cause for the irreversibility is

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

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Engineering Thermodynamics
Which of the following can be regarded as gas so that gas laws could be applicable, within the commonly encountered temperature limits?

O₂, N₂, H₂, air
O₂, N₂, steam, CO₂
SO₂, NH₃, CO₂, moisture
O₂, N₂, water vapour

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Engineering Thermodynamics
Reversed joule cycle is called

Carnot cycle
Rankine cycle
Brayton cycle
Bell Coleman cycle

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Engineering Thermodynamics
The index of compression ‘n’ tends to reach ratio of specific heats ‘y’ when

Flow is uniform and steady
Process is isentropic and specific heat does not change with temperature
Process is isothermal
Process is isentropic

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