Steam turbine | Steam turbine Objective Type Questions and answers


1. Da-laval turbines are mostly used.......


   A.Where low speeds are required

   B.For small power purposes and and low speeds

   C.For small power purposes and and high speeds

   D.Foe large power purposes


✔ View Answer


C.For small power purposes and and high speeds

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2. The degree of reaction is defined as the ratio........


   A.Heat drop in the fixed blades to the heat drop in the moving blades

   B.Heat drop in the moving blades to the heat drop in the fixed blades

   C.Heat drop in the moving blades to the total heat drop in the fixed blades

   D.Heat drop in the fixed blades to the total heat drop in the moving blades


✔ View Answer


C.Heat drop in the moving blades to the total heat drop in the fixed blades

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3. The maximum efficiency of a Da-Lavel turbine is (where α= nozzle angle)........


   A.Sin2α


   B.Cos2α

   C.Tan2α

   D.Cot2α


✔ View Answer


B.Cos2α

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4. The ratio of isentropic heat drop to the heat supplied is called........


   A.Rankine efficiency


   B.Stage efficiency

   C.Reheat factor

   D.Internal efficiency


✔ View Answer


A.Rankine efficiency

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5. Steam turbine is........combustion thermal prime mover


   A.Internal

   A.External

   C.Both internal and external

   D.None of the above


✔ View Answer


B.External

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