Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > A Pelton wheel turbine operates under a head...
Start Learning for Free
A Pelton wheel turbine operates under a head of 125 m at a speed of 2000 rpm. To operate very close to the maximum efficiency, the mean diameter of the Pelton wheel is nearly
- a)24 cm
- b)48 cm
- c)12.5 cm
- d)36 cm
Correct answer is option 'A'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
A Pelton wheel turbine operates under a head of 125 m at a speed of 2...
Assuming ideal nozzle
View all questions of this test
Vjet = √2 × g × 12.5
= 49.5 m⁄s
For maximum η bucket speed (u) must be
u = 1 / 2 × Vjet = 24.76
Also u = πdN / 60
Substituting values we get
d = 0.236 m ≈ 24 cm
Most Upvoted Answer
A Pelton wheel turbine operates under a head of 125 m at a speed of 2...
To find the mean diameter of the Pelton wheel turbine, we need to use the formula for its rotational speed in terms of the head and diameter of the wheel.
The formula for the rotational speed of a Pelton wheel turbine is given by:
N = (60 * V) / πD
Where:
N = rotational speed in rpm
V = velocity of the jet in m/s
D = diameter of the wheel in meters
We are given that the head is 125 m and the rotational speed is 2000 rpm.
First, let's calculate the velocity of the jet using the formula:
V = √(2gH)
Where:
g = acceleration due to gravity (9.81 m/s^2)
H = head in meters
V = √(2 * 9.81 * 125) = 49.5 m/s
Now, let's substitute the values into the formula for rotational speed and solve for the diameter of the wheel:
2000 = (60 * 49.5) / (πD)
D = (60 * 49.5) / (π * 2000) = 0.472 m
Since the diameter is given in cm in the answer options, we convert the diameter to cm:
D = 0.472 * 100 = 47.2 cm
From the answer options given, the closest diameter is 48 cm, which corresponds to option B.
Therefore, the correct answer is option B.
Note: There may be a slight difference in the final answer due to rounding off during calculations.
The formula for the rotational speed of a Pelton wheel turbine is given by:
N = (60 * V) / πD
Where:
N = rotational speed in rpm
V = velocity of the jet in m/s
D = diameter of the wheel in meters
We are given that the head is 125 m and the rotational speed is 2000 rpm.
First, let's calculate the velocity of the jet using the formula:
V = √(2gH)
Where:
g = acceleration due to gravity (9.81 m/s^2)
H = head in meters
V = √(2 * 9.81 * 125) = 49.5 m/s
Now, let's substitute the values into the formula for rotational speed and solve for the diameter of the wheel:
2000 = (60 * 49.5) / (πD)
D = (60 * 49.5) / (π * 2000) = 0.472 m
Since the diameter is given in cm in the answer options, we convert the diameter to cm:
D = 0.472 * 100 = 47.2 cm
From the answer options given, the closest diameter is 48 cm, which corresponds to option B.
Therefore, the correct answer is option B.
Note: There may be a slight difference in the final answer due to rounding off during calculations.
Attention Civil Engineering (CE) Students!
To make sure you are not studying endlessly, EduRev has designed Civil Engineering (CE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Civil Engineering (CE).
|
Explore Courses for Civil Engineering (CE) exam
|
|
Top Courses for Civil Engineering (CE)View all
A Pelton wheel turbine operates under a head of 125 m at a speed of 2000 rpm. To operate very close to the maximum efficiency, the mean diameter of the Pelton wheel is nearlya) 24 cmb) 48 cmc) 12.5 cmd) 36 cmCorrect answer is option 'A'. Can you explain this answer?
Question Description
A Pelton wheel turbine operates under a head of 125 m at a speed of 2000 rpm. To operate very close to the maximum efficiency, the mean diameter of the Pelton wheel is nearlya) 24 cmb) 48 cmc) 12.5 cmd) 36 cmCorrect answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about A Pelton wheel turbine operates under a head of 125 m at a speed of 2000 rpm. To operate very close to the maximum efficiency, the mean diameter of the Pelton wheel is nearlya) 24 cmb) 48 cmc) 12.5 cmd) 36 cmCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A Pelton wheel turbine operates under a head of 125 m at a speed of 2000 rpm. To operate very close to the maximum efficiency, the mean diameter of the Pelton wheel is nearlya) 24 cmb) 48 cmc) 12.5 cmd) 36 cmCorrect answer is option 'A'. Can you explain this answer?.
A Pelton wheel turbine operates under a head of 125 m at a speed of 2000 rpm. To operate very close to the maximum efficiency, the mean diameter of the Pelton wheel is nearlya) 24 cmb) 48 cmc) 12.5 cmd) 36 cmCorrect answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about A Pelton wheel turbine operates under a head of 125 m at a speed of 2000 rpm. To operate very close to the maximum efficiency, the mean diameter of the Pelton wheel is nearlya) 24 cmb) 48 cmc) 12.5 cmd) 36 cmCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A Pelton wheel turbine operates under a head of 125 m at a speed of 2000 rpm. To operate very close to the maximum efficiency, the mean diameter of the Pelton wheel is nearlya) 24 cmb) 48 cmc) 12.5 cmd) 36 cmCorrect answer is option 'A'. Can you explain this answer?.
Solutions for A Pelton wheel turbine operates under a head of 125 m at a speed of 2000 rpm. To operate very close to the maximum efficiency, the mean diameter of the Pelton wheel is nearlya) 24 cmb) 48 cmc) 12.5 cmd) 36 cmCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Civil Engineering (CE).
Download more important topics, notes, lectures and mock test series for Civil Engineering (CE) Exam by signing up for free.
Here you can find the meaning of A Pelton wheel turbine operates under a head of 125 m at a speed of 2000 rpm. To operate very close to the maximum efficiency, the mean diameter of the Pelton wheel is nearlya) 24 cmb) 48 cmc) 12.5 cmd) 36 cmCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
A Pelton wheel turbine operates under a head of 125 m at a speed of 2000 rpm. To operate very close to the maximum efficiency, the mean diameter of the Pelton wheel is nearlya) 24 cmb) 48 cmc) 12.5 cmd) 36 cmCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for A Pelton wheel turbine operates under a head of 125 m at a speed of 2000 rpm. To operate very close to the maximum efficiency, the mean diameter of the Pelton wheel is nearlya) 24 cmb) 48 cmc) 12.5 cmd) 36 cmCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of A Pelton wheel turbine operates under a head of 125 m at a speed of 2000 rpm. To operate very close to the maximum efficiency, the mean diameter of the Pelton wheel is nearlya) 24 cmb) 48 cmc) 12.5 cmd) 36 cmCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice A Pelton wheel turbine operates under a head of 125 m at a speed of 2000 rpm. To operate very close to the maximum efficiency, the mean diameter of the Pelton wheel is nearlya) 24 cmb) 48 cmc) 12.5 cmd) 36 cmCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Civil Engineering (CE) tests.
|
|
Explore Courses for Civil Engineering (CE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup