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Engineering Thermodynamics

Engineering Thermodynamics
Work done is zero for the following process

All of the listed here
Throttling
Free expansion
Constant volume

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Engineering Thermodynamics
Absolute zero pressure will occur

At a temperature of 273°K
When molecular momentum of the system becomes zero
Under vacuum conditions
At sea level

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Engineering Thermodynamics
Which of the following cycles has maximum efficiency?

Brayton
Stirling
Carnot
Rankine

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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 hard coke is obtained when carbonization of coal is carried out at

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

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Engineering Thermodynamics
Calorie is a measure of

Quantity of heat
Specific heat
Entropy
Thermal capacity

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