Steam turbine | Steam turbine Objective Type Questions and answers


16. The ratio of total useful heat drop to the total insentropic heat drop is called.......


   A.Internal efficiency

   B.Rankine efficiency

   C.Stage efficiency

   D.Efficiency ratio


✔ View Answer


B.Rankine efficiency

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17. The person's reaction turbine,the degree of reactio is........


   A.20%

   B.30%

   C.40%

   D.50%


✔ View Answer


D.50%

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18. In impulse turbine,when friction is neglected,the relative velocity of steam at outlet tip of the blade is.......the relative velocity of steam at inlet tip of the blade


   A.Equal to

   B.Less than

   C.Greater than

   D.None of the above


✔ View Answer


A.Equal to <

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19. The blade friction in the impulse turbine reduces the velocity of steam by......while it passes over the blades


   A.10% to 15%

   B.15% to 20%

   C.20% to 30%

   D.30% to 40%


✔ View Answer


A.10% to 15%

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20. In a reaction turbine,when the degree of reaction is zero,then there is......


   A.No heat drop in the moving blades

   A.No heat drop in the fixed blades

   C.Maximum heat drop in the moving blades

   D.Maximum heat drop in the fixed blades


✔ View Answer


A.No heat drop in the moving blades

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