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Engineering Thermodynamics

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

Volume
Internal energy
Temperature
Pressure

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Engineering Thermodynamics
One watt is equal to

1 Nm/s
1 Nm/hr
1 N/m
1 kNm/hr

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Engineering Thermodynamics
Minimum work in compressor is possible when the value of adiabatic index ‘n’ is equal to

1
0.75
1.35
1.27

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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

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

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Engineering Thermodynamics
The efficiency of the Carnot cycle may be increased by

Keeping the lowest temperature constant
Increasing the lowest temperature
Increasing the highest temperature
Decreasing the highest temperature

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Engineering Thermodynamics
For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be

Maximum
Infinity
Zero
Minimum

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MORE MCQ ON Engineering Thermodynamics

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