Pelton Wheel - I

15 Questions | Total Attempts: 278

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Pelton Wheel - I

Questions and Answers
  • 1. 
    Design of Pelton wheel means the following data is to be determined
    • A. 

      A) Width of buckets

    • B. 

      B) Depth of buckets

    • C. 

      C) Number of buckets

    • D. 

      D) All of the mentioned

  • 2. 
    The width of buckets of Pelton wheel is _________________
    • A. 

      A) 2 times diameter of jet

    • B. 

      B) 3 times diameter of jet

    • C. 

      C) 4 times diameter of jet

    • D. 

      D) 5 times diameter of jet

  • 3. 
    The depth of buckets of Pelton wheel ____________
    • A. 

      A) 1.2 times diameter of jet

    • B. 

      B) 1.3 times diameter of jet

    • C. 

      C) 1.4 times diameter of jet

    • D. 

      D) 1.5 times diameter of jet

  • 4. 
    The ratio of pitch diameter of Pelton wheel to diameter of jet is known as ___________
    • A. 

      A) Speed ratio

    • B. 

      B) Jet ratio

    • C. 

      C) Velocity ratio

    • D. 

      D) Co-efficient of velocity

  • 5. 
    Find the pitch diameter of runner D, if jet ratio m and diameter of jet d are given as 10 and 125mm.
    • A. 

      A) 1.25 meters

    • B. 

      B) 1.5 meters

    • C. 

      C) 2 meters

    • D. 

      D) 1.2 meters

  • 6. 
    6. The number of buckets of Pelton wheel is 25 and diameter of runner is 1.5meters then calculate diameter of jet is ___________
    • A. 

      A) 80mm

    • B. 

      B) 75mm

    • C. 

      C) 90mm

    • D. 

      D) 82mm

  • 7. 
     In most of cases the value of jet ratio is _______________
    • A. 

      A) 10

    • B. 

      B) 11

    • C. 

      C) 12

    • D. 

      D) 13

  • 8. 
    Number of buckets on runner of Pelton wheel is given by expression? (D-diameter of runner and d- diameter of jet)
    • A. 

      A) 15 + D/2d

    • B. 

      B) 15 + 3D/2d

    • C. 

      C) 15 + D/d

    • D. 

      D) 15 + 2D/d

  • 9. 
    ____________ is obtained by dividing total rate of flow through the turbine by rate of flow through single jet.
    • A. 

      A) Number of jets

    • B. 

      B) Diameter of jets

    • C. 

      C) Velocity of jets

    • D. 

      D) Speed ratio

  • 10. 
    If diameter of jet is 85mm and diameter of runner is 1.5 meter then calculate width of buckets.
    • A. 

      A) 400mm

    • B. 

      B) 500mm

    • C. 

      C) 420mm

    • D. 

      D) 425mm

  • 11. 
    If diameter of jet is 85mm and diameter of runner is 1.5 meter then depth of buckets is ___________
    • A. 

      A) 100mm

    • B. 

      B) 105mm

    • C. 

      C) 106mm

    • D. 

      D) 102mm

  • 12. 
    If diameter of jet is 85mm and diameter of runner is 1.5 meter then calculate number of buckets on Pelton wheel approximately
    • A. 

      A) 20

    • B. 

      B) 22

    • C. 

      C) 23

    • D. 

      D) 25

  • 13. 
    The width of Pelton wheel should be 5 times the diameter of jet.
    • A. 

      A) True

    • B. 

      B) False

  • 14. 
    The ratio of diameter of jet to diameter of runner is _____________
    • A. 

      A) 1:3

    • B. 

      B) 1:6

    • C. 

      C) 1:5

    • D. 

      D) 3:4

  • 15. 
    Turbines installed at Bhakra Nangal are.
    • A. 

      A)    pelton wheels

    • B. 

      B)    Francis turbines

    • C. 

      C)    Kaplan turbines

    • D. 

      D)    propeller turbines

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