| 1. | A Carnot engine operates between temperature 1000 K and 400 K. The heat rejected by the first Carnot engine is used by the second Carnot engine, whose sink temperature is 200 K. If the net heat absorbed by the first Carnot engine is 200 MJ. What is the heat rejected (in MJ) by the second Carnot engine ? | |
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40
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50
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60
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70
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Report Question| 2. | Which of the following gas is used as a working medium in air standard cycle ? | |
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Ideal gas
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Natural gas
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Perfect gas
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Real gas
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| 3. | An engine based on a standard Otto cycle is operating with air as an medium with specific heat of 1.4 has a cylinder diameter of 5 cm and stroke length of 7.5 cm. If the clearance volume is 88.15 cc and the heat supplied per kg of air per cycle is 900 kJ/kg, then work output (in kJ) per kg of air is ? | |
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-291.6
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0
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291.6
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1800
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| 4. | A closed system contains saturated liquid ammonia at 10°C. The mass of ammonia is 5 kg. The amount of heat that is required to convert all the saturated liquid to vapour at constant pressure is 16.2 MJ. If the entropy of saturated liquid is 0.88 kJ/kg-K, what is the entropy (kJ/kg-K) of saturated vapour process without heat transfer ? | |
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6.6
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8.7
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12.32
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14.72
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| 5. | Why the study of air standard cycle is proposed ? | |
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To know the forces acting on the engine.
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To simplify analysis of I.C engine.
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To increase the efficiency of I.C engine.
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None of these
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| 6. | How is the rate of burning of fuel controlled in the compression ignition engine ? | |
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Controlling the design of cylinder
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Rate of injection of fuel
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Rate of air into carburetor
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Controlling temperature of the engine
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| 7. | Babbitt metal is _______ base alloy ? | |
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Tin
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Copper
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Lead
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Tungsten
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| 8. | With which of the following polymerization is associated ? | |
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Copper
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Zinc
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Thermoplastic
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None of these
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| 9. | _______ can easily be drawn into wire. ? | |
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Cast Iron
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Zinc
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Tin
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Copper
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| 10. | _______ is the binding material in cemented carbides. ? | |
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Nickel
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Cobalt
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Carbon
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Vanadium
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