Steam turbine | Steam turbine Objective Type Questions and answers


11. In an impulse turbine.......


   A.The steam is expanded in nozzles only and there is a pressure drop and heat drop

   B.The steam is expanded both in fixed and moving blades continuously

   C.The steam is expanded in moving blades only

   D.The pressure and temperature of steam remains constant


✔ View Answer


A.The steam is expanded in nozzles only and there is a pressure drop and heat drop

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12. The person's reaction turbine has........


   A.Only moving blades

   B.Only fixed blades

   C.Identical moving and fixed blades

   D.Fixed and moving blades of different shape


✔ View Answer


C.Identical moving and fixed blades

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13. The stage efficiency (ηs)is given by ( where ηb=blading efficiency and ηn =nozzle efficiency )........


   A.ηbn

   B.ηnb

   C.ηbηn

   D.ηnb


✔ View Answer


C.ηbηn

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14. The reheating of steam in a turbine........


   A.Increases the workdone through the turbine

   B.Increases the efficiency of the turbine

   C.Reduces wear on the blades

   D.All of the above


✔ View Answer


D.All of the above

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15. The thermal efficiency of a steam turbine is......than that of steam engine


   A.Lower

   A.Higher

   C.Same

   D.None of the above


✔ View Answer


B.Higher

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