Question:
Which one of the following is not the main component of hydro-electric power plant ?
Which one of the following is not the main component of hydro-electric power plant ?
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Economizer belongs to:
\[
\text{Thermal Power Plant}
\]
not hydro-electric power plant.
Updated On: May 22, 2026
- Surge Tank
- Penstock
- Turbine
- Economizer
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Concept:
A hydro-electric power plant converts:
\[
\text{Potential Energy of Water}
\]
into:
\[
\text{Electrical Energy}
\]
Main components of a hydro-electric plant include:
• dam,
• reservoir,
• penstock,
• turbine,
• generator,
• surge tank. An economizer is not a hydroelectric component.
Step 1: Understanding Surge Tank. A surge tank:
• controls pressure fluctuations,
• protects penstock,
• reduces water hammer effect. Hence it is an important hydroelectric component.
Step 2: Understanding Penstock. A penstock is: \[ \text{Large pipe carrying water to turbine} \] It transports high-pressure water from reservoir to turbine.
Step 3: Understanding Turbine. Turbine converts: \[ \text{Hydraulic Energy} \rightarrow \text{Mechanical Energy} \] which drives the generator.
Step 4: Understanding Economizer. An economizer is used in: \[ \text{Thermal Power Plants} \] It improves boiler efficiency by:
• preheating feed water,
• utilizing exhaust heat. Hydroelectric plants do not use boilers. Therefore economizer is not a hydroelectric component.
Step 5: Selecting the correct answer. Thus the correct answer is: \[ \boxed{(4)} \]
• dam,
• reservoir,
• penstock,
• turbine,
• generator,
• surge tank. An economizer is not a hydroelectric component.
Step 1: Understanding Surge Tank. A surge tank:
• controls pressure fluctuations,
• protects penstock,
• reduces water hammer effect. Hence it is an important hydroelectric component.
Step 2: Understanding Penstock. A penstock is: \[ \text{Large pipe carrying water to turbine} \] It transports high-pressure water from reservoir to turbine.
Step 3: Understanding Turbine. Turbine converts: \[ \text{Hydraulic Energy} \rightarrow \text{Mechanical Energy} \] which drives the generator.
Step 4: Understanding Economizer. An economizer is used in: \[ \text{Thermal Power Plants} \] It improves boiler efficiency by:
• preheating feed water,
• utilizing exhaust heat. Hydroelectric plants do not use boilers. Therefore economizer is not a hydroelectric component.
Step 5: Selecting the correct answer. Thus the correct answer is: \[ \boxed{(4)} \]
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