| 1. | What is the main characteristic of a quasi-static process ? | |
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An infinitely slow process.
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A random process.
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A spontaneous process.
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A stationary process.
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Report Question| 2. | Which of the following is NOT a feature of Carnot engine ? | |
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It has the maximum efficiency among all the engines.
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The efficiency of Carnot engine is dependent on temperatures.
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It works with only one heat reservoir.
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For all Carnot engines, working under same temperature range has same efficiency.
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| 3. | Which of the following statement is FALSE about entropy ? | |
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Entropy change of the system is the degree of increase or decrease of its randomness.
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Entropy of solid state is the least.
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Entropy of universe is decreasing.
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Entropy of substance with a high degree of randomness is higher.
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| 4. | In an Otto cycle, how does heat addition takes place ? | |
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Irreversibly at constant pressure
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Irreversibly at constant volume
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Reversibly at constant pressure
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Reversibly at constant volume
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| 5. | Increasing the compression ratio beyond a certain limit, results to ________ ? | |
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delay in fuel burning
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engine knocking
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excessive heat in the engine
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high fuel consumption
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| 6. | The mean effective pressure of an engine denotes the _______ ? | |
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average pressure
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instantaneous pressure
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maximum pressure
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minimum pressure
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| 7. | What will be the change in the level of water when the closed and rigid tank of volume 0.035 m³ is slowly heated. The mass of the mixture is 10 kg at 0.1 MPa and water has a critical specific volume of 0.004155 m³/kg ? | |
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will fall
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will rise
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will be constant
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cannot be determined
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| 8. | What is the other name for Diesel Cycle ? | |
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Constant pressure cycle.
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Constant temperature cycle.
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Constant volume cycle.
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None of these
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| 9. | If a Carnot engine rejects ¼ of the heat from the reservoir, what is the efficiency of Carnot engine ? | |
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0.25
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0.5
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0.75
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0.8
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| 10. | One kg of air (R=287 J/kg-K) goes through an irreversible process between two equilibrium state 1 (30°C, 1.2 m³) and state 2 (30°C, 0.8 m³). What is the change in entropy (in J/kg-K) ? | |
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-116.36
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-50.53
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50.53
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116.36
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