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Engineering Thermodynamics

Engineering Thermodynamics
The kinetic energy per kg molecule of any gas at absolute temperature T is equal to (where Ru = Universal gas constant)

1.5 Ru × T
Ru × T
2 Ru × T
3 Ru × T

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Engineering Thermodynamics
When the gas is cooled at constant pressure,

Both temperature and volume decreases
Its volume increases but temperature decreases
Both temperature and volume increases
Its temperature increases but volume decreases

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Engineering Thermodynamics
Entropy change depends on

Mass transfer
Heat transfer
Thermodynamic state
Change of temperature

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Engineering Thermodynamics
The efficiency of a Carnot engine depends on

Temperatures of source and sink
Working substance
Size of engine
Design of engine

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Engineering Thermodynamics
Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle

Maximum temperature is higher
Expansion and compression are isentropic
Heat rejection is lower
Combustion is at constant volume

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Engineering Thermodynamics
The amount of heat generated per kg of fuel is known as

Heat energy
Lower calorific value
Calorific value
Higher calorific value

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MORE MCQ ON Engineering Thermodynamics

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