| 1. | In a P-V diagram for pure substance, the constant temperature line in superheated region is ________ ? | |
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converging
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diverging
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intersecting
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parallel
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Report Question| 2. | The entropy change of the system and the surroundings during a process between two equilibrium states is ________ ? | |
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equal to zero
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greater than zero
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less than zero
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greater than or equal to zero
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| 3. | Which equation best represents the net entropy change (s) for an irreversible process ? | |
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s = 0
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s = 1
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s < 0
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s > 0
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| 4. | Which of the engine has a spark plug used for igniting the fuel ? | |
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Petrol engine
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Diesel engine
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Steam engine
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Gas engine
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| 5. | In a P-T diagram for pure substance, the melting line has highest inclination with respect to the positive horizontal axis representing temperature for which type of substance ? | |
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Substance that contracts on freezing
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Substance that expands on freezing
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Substance that has same volume on freezing
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None of these
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| 6. | The work done by a system is 45 kJ. If the internal energy of the system is decreased by 15 kJ. What is the heat received (in kJ) by the system ? | |
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-60
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-30
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30
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60
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| 7. | A reversible adiabatic in a T-S diagram is a ________ ? | |
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point
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vertical line
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horizontal line
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parabolic curve
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| 8. | Specific enthalpy is an ________ of a system and its unit is ________ ? | |
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extensive property, kJ
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extensive property, kJ/kg
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intensive property, kJ
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intensive property, kJ/kg
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| 9. | The internal energy of the system is a function of temperature only U=30+0.5t kJ. If the system does the work of 0.5 kJ/K. What is the increase in heat interaction per degree temperature ? | |
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-1
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0
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1
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Cannot be determined
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| 10. | 2500 kJ/min heat is supplied to a heat engine at 7270C. It rejects heat at 900 kJ/min at 2230C. This type of engine is ________ ? | |
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ideal
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irreversible
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impossible
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practical
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