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Consider the following types of water turbines:
1. Bulb
2. Francis
3. Kaplan
4. Pelton
The correct sequence of order in which the operating head decreases while developing the same power is
1. Bulb
2. Francis
3. Kaplan
4. Pelton
The correct sequence of order in which the operating head decreases while developing the same power is
- a)4 – 2 – 3 – 1
- b)3 – 4 – 1 – 2
- c)2 – 1 – 4 – 3
- d)1 – 3 – 2 – 4
Correct answer is option 'A'. Can you explain this answer?
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Consider the following types of water turbines:1. Bulb2. Francis3. Kap...
Ans. (a)
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Consider the following types of water turbines:1. Bulb2. Francis3. Kap...
Explanation:
In order to understand the correct sequence of water turbines in terms of decreasing operating head while developing the same power, let's discuss each type of turbine briefly and analyze their characteristics.
1. Bulb Turbine:
- A bulb turbine is a type of hydro turbine that is installed in a bulb-shaped housing, which contains both the generator and turbine.
- It is typically used in low to medium head applications.
- The operating head of a bulb turbine is relatively low compared to other types of turbines.
2. Francis Turbine:
- A Francis turbine is a type of reaction turbine that is widely used for medium to high head applications.
- It consists of a runner with fixed guide vanes and adjustable runner blades.
- The operating head of a Francis turbine is higher than that of a bulb turbine but lower than a Kaplan turbine.
3. Kaplan Turbine:
- A Kaplan turbine is a type of propeller turbine that is specifically designed for low head applications.
- It has adjustable blades and can operate efficiently in a wide range of head and flow conditions.
- The operating head of a Kaplan turbine is higher than that of a Francis turbine but lower than a Pelton turbine.
4. Pelton Turbine:
- A Pelton turbine is a type of impulse turbine that is typically used for high head applications.
- It consists of one or more nozzles that direct a high-velocity jet of water onto the buckets of a runner.
- The operating head of a Pelton turbine is the highest among all the mentioned turbine types.
Sequence of Operating Head:
Based on the above explanations, we can determine the correct sequence of turbines in terms of decreasing operating head while developing the same power:
1. Pelton Turbine: The operating head of a Pelton turbine is the highest among all the mentioned turbine types, so it comes first in the sequence.
2. Francis Turbine: The operating head of a Francis turbine is higher than that of a bulb turbine but lower than a Kaplan turbine.
3. Kaplan Turbine: The operating head of a Kaplan turbine is higher than that of a bulb turbine.
4. Bulb Turbine: The operating head of a bulb turbine is relatively low compared to other types of turbines, so it comes last in the sequence.
Therefore, the correct sequence is option 'A': 4-2-3-1.
In order to understand the correct sequence of water turbines in terms of decreasing operating head while developing the same power, let's discuss each type of turbine briefly and analyze their characteristics.
1. Bulb Turbine:
- A bulb turbine is a type of hydro turbine that is installed in a bulb-shaped housing, which contains both the generator and turbine.
- It is typically used in low to medium head applications.
- The operating head of a bulb turbine is relatively low compared to other types of turbines.
2. Francis Turbine:
- A Francis turbine is a type of reaction turbine that is widely used for medium to high head applications.
- It consists of a runner with fixed guide vanes and adjustable runner blades.
- The operating head of a Francis turbine is higher than that of a bulb turbine but lower than a Kaplan turbine.
3. Kaplan Turbine:
- A Kaplan turbine is a type of propeller turbine that is specifically designed for low head applications.
- It has adjustable blades and can operate efficiently in a wide range of head and flow conditions.
- The operating head of a Kaplan turbine is higher than that of a Francis turbine but lower than a Pelton turbine.
4. Pelton Turbine:
- A Pelton turbine is a type of impulse turbine that is typically used for high head applications.
- It consists of one or more nozzles that direct a high-velocity jet of water onto the buckets of a runner.
- The operating head of a Pelton turbine is the highest among all the mentioned turbine types.
Sequence of Operating Head:
Based on the above explanations, we can determine the correct sequence of turbines in terms of decreasing operating head while developing the same power:
1. Pelton Turbine: The operating head of a Pelton turbine is the highest among all the mentioned turbine types, so it comes first in the sequence.
2. Francis Turbine: The operating head of a Francis turbine is higher than that of a bulb turbine but lower than a Kaplan turbine.
3. Kaplan Turbine: The operating head of a Kaplan turbine is higher than that of a bulb turbine.
4. Bulb Turbine: The operating head of a bulb turbine is relatively low compared to other types of turbines, so it comes last in the sequence.
Therefore, the correct sequence is option 'A': 4-2-3-1.
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Consider the following types of water turbines:1. Bulb2. Francis3. Kaplan4. PeltonThe correct sequence of order in which the operating head decreases while developing the same power isa)4 – 2 – 3 – 1b)3 – 4 – 1 – 2c)2 – 1 – 4 – 3d)1 – 3 – 2 – 4Correct answer is option 'A'. Can you explain this answer?
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