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Engineering Thermodynamics

Engineering Thermodynamics
For reversible adiabatic process, change in entropy is

Minimum
Negative
Zero
Maximum

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Engineering Thermodynamics
According to Gay Lussac’s law for a perfect gas, the absolute pressure of given mass varies directly as

None of these
Absolute temperature, if volume is kept constant
Temperature
Volume, if temperature is kept constant

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Engineering Thermodynamics
The more effective way of increasing efficiency of Carnot engine is to

Increase lower temperature
Decrease lower temperature
Decrease higher temperature
Increase higher temperature

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Engineering Thermodynamics
The heat supplied to the gas at constant volume is (where m = Mass of gas, cv = Specific heat at constant volume, cp = Specific heat at constant pressure, T2 - T1 = Rise in temperature, and R = Gas constant)

mcp (T2 - T1)
mcv (T2 - T1)
mR (T2 - T1)
mcp (T2 + T1)

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Engineering Thermodynamics
Which of the following processes is irreversible process?

Throttling
Isothermal
All of these
Adiabatic

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Engineering Thermodynamics
The ratio of two specific heats of air is equal to

0.24
0.1
0.17
1.41

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MORE MCQ ON Engineering Thermodynamics

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