| 1. | A binary vapour plant consists of ? | |
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steam turbine
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steam condenser
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mercury boiler
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all of these
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Report Question| 2. | The reheat factor depends upon ? | |
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initial pressure and superheat
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exit pressure
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turbine stage efficiency
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all of these
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| 3. | In a reaction turbine when the degree of reaction is zero, then there is ? | |
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no heat drop in moving blades
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no heat drop in fixed blades
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maximum heat drop in moving blades
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maximum heat drop in fixed blades
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| 4. | The nozzle efficiency is the ratio of ? | |
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workdone on the blades to the energy supplied to the blades
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workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam
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energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam
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none of the above
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| 5. | A single stage impulse turbine with a diameter of 1.2 m runs at 3000 r.p.m. If the blade speed ratio is 0.42, then the inlet velocity of steam will be ? | |
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79 m/s
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188 m/s
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450 m/s
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900 m/s
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| 6. | The process of draining steam from the turbine, at certain points during its expansion and using this steam for heating the feed water in feed water heaters and then supplying it to the boiler is known as ? | |
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regenerative heating
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reheating of steam
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bleeding
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none of these
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| 7. | Degree of reaction is defined as the ratio of ? | |
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heat drop in fixed blades to the heat drop in moving blades
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heat drop in moving blades to the heat drop in fixed blades
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heat drop in moving blades to the heat drop in fixed blades plus heat drop in moving blades
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heat drop in fixed blades plus heat drop in moving blades to the heat drop in moving blades
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| 8. | The expansion of steam, as it flows over the blades in reaction turbine, represents ? | |
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isothermal process
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isentropic process
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throttling process
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free-expansion process
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| 9. | Curtis turbine is a ? | |
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simple reaction turbine
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velocity compounded turbine
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pressure compounded turbine
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pressure-velocity compounded turbine
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| 10. | Which of the following statement is correct ? | |
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The expansion of steam in a nozzle follows Rankine cycle
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The friction in the nozzle increases the dryness fraction of steam
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The pressure of steam at throat is called critical pressure
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all of the above
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