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Engineering Thermodynamics

Engineering Thermodynamics
Which of the following parameters is constant for a mole for most of the gases at a given temperature and pressure

Entropy
Volume
Mass
Enthalpy

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Engineering Thermodynamics
Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant

Pressure
Volume
Temperature
Internal energy

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Engineering Thermodynamics
If the value of n = 0 in the equation pvn = C, then the process is called

Constant volume process
Isothermal process
Constant pressure process
Adiabatic process

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Engineering Thermodynamics
The efficiency of Diesel cycle approaches to Otto cycle efficiency when

Cut-off is increased
Cut-off is constant
Cut-off is zero
Cut-off is decreased

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Engineering Thermodynamics
Compressed air coming out from a punctured football

Becomes hotter
May become hotter or cooler depending upon the humidity of the surrounding air
Remains at the same temperature
Becomes cooler

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Engineering Thermodynamics
If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called

Adiabatic expansion
Parabolic expansion
Free expansion
Hyperbolic expansion

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