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Engineering Thermodynamics

Engineering Thermodynamics
On weight basis, air contains following parts of oxygen

73
23
25
21

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Engineering Thermodynamics
The molecular mass expressed in gram (i.e. 1 g - mole) of all gases, at N. T. P., occupies a volume of

2.24 liters
224 liters
0.224 liters
22.4 liters

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Engineering Thermodynamics
The efficiency of the Carnot cycle is (where T1 and T2 = Highest and lowest temperature during the cycle)

1 + (T2/T1)
1 - (T1/T2)
(T1/T2) - 1
1 - (T2/T1)

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

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

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Engineering Thermodynamics
Which of the following is the extensive property of a thermodynamic system?

Density
Pressure
Temperature
Volume

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Engineering Thermodynamics
Molecular volume of any perfect gas at 600 × 103 N/m² and 27°C will be

400 m3/kg mol
41.7 m3/kg mol
0.15 m3/kg mol
4.17 m3/kg mol

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