Power Plant Engineering

31. In case of impulse steam turbine

1. there is enthalpy drop in fixed and moving blades
2. there is enthalpy drop only in moving blades
3. there is enthalpy drop in nozzles
4. none of the above

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32. In coal preparation plant, magnetic separators are used to remove

1. dust
2. clinkers
3. iron particles
4. sand

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33. In De Laval steam turbine

1. the pressure in the turbine rotor is approximately same as in condenser
2. the pressure in the turbine rotor is higher than pressure in the con¬denser
3. the pressure in the turbine rotor gradually decreases from inlet to exit from condenser
4. none from the above

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34. In fuel cell, the _________ energy is converted into electrical energy.

1. mechanical
2. chemical
3. heat
4. sound

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35. In India largest thermal power station is located at

1. Kota
2. Sarni
3. Chandrapur
4. Neyveli

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36. In jet type condensers

1. cooling water passes through tubes and steam surrounds them
2. steam passes through tubes and cooling water surrounds them
3. steam and cooling water mix
4. steam and cooling water do not mix

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37. In Rankine cycle the work output from the turbine is given by

1. change of internal energy between inlet and outlet
2. change of enthaply between inlet and outlet
3. change of entropy between inlet and outlet
4. change of temperature between inlet and outlet

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38. In regenerative cycle feed water is heated by

1. exhaust gases
2. heaters
3. draining steam from the turbine
4. all above

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39. In steam turbines the reheat factor

1. increases with the increase in number of stages
2. decreases with the increase in number of stages
3. remains same irrespective of number of stages
4. none of the above

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40. Incase of reaction steam turbine

1. there is enthalpy drop both in fixed and moving blades
2. there is enthalpy drop only in fixed blades
3. there is enthalpy drop only in moving blades
4. none of the above

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