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Engineering Thermodynamics

Engineering Thermodynamics
The ultimate analysis of coal consists of the determination of the percentage of

All of the listed here
Carbon
Hydrogen and nitrogen
Sulphur and ash

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Engineering Thermodynamics
The absolute zero pressure will be

At the center of the earth
When molecular momentum of the system becomes zero
At the temperature of - 273 K
At sea level

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Engineering Thermodynamics
In a no flow reversible process for which p = (-3V + 15) × 105 N/m², V changes from 1 m3 to 2 m3. The work done will be about

100 × 10⁵ joules
10 × 10⁵ joules
1 × 10⁵ joules
10 × 10⁵ kilo joules

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Engineering Thermodynamics
Superheated vapour behaves

Approximately as a gas
As ordinary vapour
As steam
Exactly as gas

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Engineering Thermodynamics
During throttling process

Heat exchange does not take place
All of these
There is no change of internal energy of steam
No work is done by expanding steam

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Engineering Thermodynamics
According to which law, all perfect gases change in volume by 1/273th of their original volume at 0°C for every 1°C change in temperature when pressure remains constant

Joule's law
Charles' law
Boyle's law
Gay Lussac’s law

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