Pelton Wheel - I

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| By Manish Singh
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Manish Singh
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Quizzes Created: 2 | Total Attempts: 548
| Attempts: 366
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  • 1/15 Questions

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

    • A) True
    • B) False
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About This Quiz

Explore the Pelton Wheel's design through this quiz titled 'Pelton Wheel - I'. Assess key aspects like bucket dimensions, jet ratios, and runner diameters. Ideal for learners and professionals in mechanical engineering, enhancing understanding of Pelton Wheel mechanics.

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  • 2. 

    The depth of buckets of Pelton wheel ____________

    • A) 1.2 times diameter of jet

    • B) 1.3 times diameter of jet

    • C) 1.4 times diameter of jet

    • D) 1.5 times diameter of jet

    Correct Answer
    A. A) 1.2 times diameter of jet
    Explanation
    Answer: a
    Explanation: To obtain Pelton wheel of higher efficiency, depth of buckets is specified as 1.2 times diameter of jet by considering several experimental observations.

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  • 3. 

     In most of cases the value of jet ratio is _______________

    • A) 10

    • B) 11

    • C) 12

    • D) 13

    Correct Answer
    A. C) 12
    Explanation
    Answer: c
    Explanation: Jet ratio is 12 because in most of Pelton turbines diameter of runner is 12 times the diameter of jet.

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  • 4. 

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

    • A) 15 + D/2d

    • B) 15 + 3D/2d

    • C) 15 + D/d

    • D) 15 + 2D/d

    Correct Answer
    A. A) 15 + D/2d
    Explanation
    Answer: a
    Explanation: To obtain Pelton wheel of higher efficiency, number of buckets is specified as 15 + D/2d by considering several experimental observations.

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  • 5. 

    If diameter of jet is 85mm and diameter of runner is 1.5 meter then depth of buckets is ___________

    • A) 100mm

    • B) 105mm

    • C) 106mm

    • D) 102mm

    Correct Answer
    A. D) 102mm
    Explanation
    Answer: d
    Explanation: The expression for measuring depth of buckets is 1.2*diameter of jet, which is 1.2*85=102mm.

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  • 6. 

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

    • A) 1.25 meters

    • B) 1.5 meters

    • C) 2 meters

    • D) 1.2 meters

    Correct Answer
    A. A) 1.25 meters
    Explanation
    Answer: a
    Explanation: Expression for jet ratio is m=D/d which is 10*0.125= 1.25 meters.

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  • 7. 

    Design of Pelton wheel means the following data is to be determined

    • A) Width of buckets

    • B) Depth of buckets

    • C) Number of buckets

    • D) All of the mentioned

    Correct Answer
    A. D) All of the mentioned
    Explanation
    Answer: d
    Explanation: In design of Pelton wheel we determine diameter of jet, diameter of runner, Width of buckets, Depth of buckets, Number of buckets on runner.

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  • 8. 

    The ratio of pitch diameter of Pelton wheel to diameter of jet is known as ___________

    • A) Speed ratio

    • B) Jet ratio

    • C) Velocity ratio

    • D) Co-efficient of velocity

    Correct Answer
    A. B) Jet ratio
    Explanation
    Answer: b
    Explanation: The ratio of pitch diameter of Pelton wheel to diameter of jet is known as jet ratio.

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  • 9. 

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

    • A) 400mm

    • B) 500mm

    • C) 420mm

    • D) 425mm

    Correct Answer
    A. D) 425mm
    Explanation
    Answer: d
    Explanation: The expression for measuring width of buckets is 5*diameter of jet, which is 5*85=425mm.

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  • 10. 

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

    • A) Number of jets

    • B) Diameter of jets

    • C) Velocity of jets

    • D) Speed ratio

    Correct Answer
    A. A) Number of jets
    Explanation
    Answer: a
    Explanation: Total discharge is sum of individual discharges hence, by dividing total rate of flow through the turbine by rate of flow through single jet we get number of jets.

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  • 11. 

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

    • A) 80mm

    • B) 75mm

    • C) 90mm

    • D) 82mm

    Correct Answer
    A. B) 75mm
    Explanation
    Answer: b
    Explanation: The expression for measuring number of buckets is 15 + diameter of runner/2 times diameter of jet by using this expression we get diameter of jet as 75mm.

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  • 12. 

    The ratio of diameter of jet to diameter of runner is _____________

    • A) 1:3

    • B) 1:6

    • C) 1:5

    • D) 3:4

    Correct Answer
    A. B) 1:6
    Explanation
    Answer: b
    Explanation: To obtain Pelton wheel of higher efficiency, diameter of runner is 5 times diameter of jet by considering several experimental observations.

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  • 13. 

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

    • A) 20

    • B) 22

    • C) 23

    • D) 25

    Correct Answer
    A. D) 25
    Explanation
    Answer: d
    Explanation: The expression for measuring number of buckets is 15 + diameter of runner/2 time’s diameter of jet, which are 15 + 1.5/2*0.085.

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  • 14. 

    The width of buckets of Pelton wheel is _________________

    • A) 2 times diameter of jet

    • B) 3 times diameter of jet

    • C) 4 times diameter of jet

    • D) 5 times diameter of jet

    Correct Answer
    A. D) 5 times diameter of jet
    Explanation
    Answer: d
    Explanation: To obtain Pelton wheel of higher efficiency, width of buckets is specified as 5 times diameter of jet by considering several experimental observations.

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  • 15. 

    Turbines installed at Bhakra Nangal are.

    • A)    pelton wheels

    • B)    Francis turbines

    • C)    Kaplan turbines

    • D)    propeller turbines

    Correct Answer
    A. A)    pelton wheels
    Explanation
    Answer: a
    Explanation: pelton wheels

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 26, 2020
    Quiz Created by
    Manish Singh
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