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Engineering Thermodynamics

Engineering Thermodynamics
In a reversible adiabatic process, the ratio of T1/T2 is equal to

(p1/p2)γ - 1/ γ
(p2/p1)γ - 1/ γ
(v1/v2)γ - 1/ γ
(v2/v1)γ - 1/ γ

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Engineering Thermodynamics
For a perfect gas, according to Boyle’s law (where P = Absolute pressure, V = Volume and T = Absolute temperature)

T/P = constant, if v is kept constant
P/T = constant, if v is kept constant
V/T = constant, if p is kept constant
P v = constant, if T is kept constant

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Engineering Thermodynamics
The atomic mass of sulphur is

16
12
32
14

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Engineering Thermodynamics
No liquid can exist as liquid at

273°K
Vacuum
Centre of earth
Zero pressure

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Engineering Thermodynamics
The main cause for the irreversibility is

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

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Engineering Thermodynamics
When coal is first dried and then crushed to a fine powder by pulverizing machine, the resulting fuel is called

None of these
Bituminous coal
Wood charcoal
Briquetted coal

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