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Engineering Thermodynamics

Engineering Thermodynamics
Which of the following cycles has maximum efficiency?

Stirling
Carnot
Brayton
Rankine

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Engineering Thermodynamics
The hard coke is obtained when carbonization of coal is carried out at

700° to 900°C
900° to 1100°C
500° to 700°C
300° to 500°C

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Engineering Thermodynamics
All perfect gases change in volume by 1/273th of its original volume at 0°C for every 1°C change in temperature, when the pressure remains constant. This statement is called

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

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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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Engineering Thermodynamics
For the same compression ratio, the efficiency of Diesel cycle is __________ Otto cycle.

Less than
Greater than
Equal to
None of these

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

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

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