Pelton Wheel - I
- 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
Correct Answer
D. D) All of the mentionedExplanation
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.Rate this question:
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- 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
Correct Answer
D. D) 5 times diameter of jetExplanation
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.Rate this question:
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- 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
Correct Answer
A. A) 1.2 times diameter of jetExplanation
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.Rate this question:
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- 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
Correct Answer
B. B) Jet ratioExplanation
Answer: b
Explanation: The ratio of pitch diameter of Pelton wheel to diameter of jet is known as jet ratio.Rate this question:
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- 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
Correct Answer
A. A) 1.25 metersExplanation
Answer: a
Explanation: Expression for jet ratio is m=D/d which is 10*0.125= 1.25 meters.Rate this question:
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- 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
Correct Answer
B. B) 75mmExplanation
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.Rate this question:
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- 7.
In most of cases the value of jet ratio is _______________
- A.
A) 10
- B.
B) 11
- C.
C) 12
- D.
D) 13
Correct Answer
C. C) 12Explanation
Answer: c
Explanation: Jet ratio is 12 because in most of Pelton turbines diameter of runner is 12 times the diameter of jet.Rate this question:
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- 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
Correct Answer
A. A) 15 + D/2dExplanation
Answer: a
Explanation: To obtain Pelton wheel of higher efficiency, number of buckets is specified as 15 + D/2d by considering several experimental observations.Rate this question:
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- 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
Correct Answer
A. A) Number of jetsExplanation
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.Rate this question:
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- 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
Correct Answer
D. D) 425mmExplanation
Answer: d
Explanation: The expression for measuring width of buckets is 5*diameter of jet, which is 5*85=425mm.Rate this question:
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- 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
Correct Answer
D. D) 102mmExplanation
Answer: d
Explanation: The expression for measuring depth of buckets is 1.2*diameter of jet, which is 1.2*85=102mm.Rate this question:
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- 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
Correct Answer
D. D) 25Explanation
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.Rate this question:
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- 13.
The width of Pelton wheel should be 5 times the diameter of jet.
- A.
A) True
- B.
B) False
Correct Answer
A. A) TrueExplanation
Answer: a
Explanation: To obtain Pelton wheel of higher efficiency, width of buckets is specified as 5 times diameter of jet by considering several experimental observations.Rate this question:
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- 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
Correct Answer
B. B) 1:6Explanation
Answer: b
Explanation: To obtain Pelton wheel of higher efficiency, diameter of runner is 5 times diameter of jet by considering several experimental observations.Rate this question:
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- 15.
Turbines installed at Bhakra Nangal are.
- A.
A) pelton wheels
- B.
B) Francis turbines
- C.
C) Kaplan turbines
- D.
D) propeller turbines
Correct Answer
A. A) pelton wheelsExplanation
Answer: a
Explanation: pelton wheelsRate this question:
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Current Version
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Mar 20, 2023Quiz Edited by
ProProfs Editorial Team -
Mar 26, 2020Quiz Created by
Manish Singh
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