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Engineering Thermodynamics

Engineering Thermodynamics
Change in enthalpy of a system is the heat supplied at

Constant pressure
Constant entropy
Constant volume
Constant temperature

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Engineering Thermodynamics
If a system after undergoing a series of processes, returns to the initial state then

Process is executed in closed system cycle
Its entropy will change due to irreversibility
Process is thermodynamically in equilibrium
Sum of heat and work transfer will be zero

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Engineering Thermodynamics
The heat energy stored in the gas and used for raising the temperature of the gas is known as

External energy
Kinetic energy
Internal energy
Molecular energy

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Engineering Thermodynamics
Which of the following processes are thermodynamically reversible?

Isothermal and adiabatic
Throttling
Free expansion
Constant volume and constant pressure

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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)

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

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Engineering Thermodynamics
The efficiency of Diesel cycle depends upon

Temperature limits
Pressure ratio
Cut-off ratio and compression ratio
Compression ratio

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MORE MCQ ON Engineering Thermodynamics

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