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Question Detail
Advantage of hydro-electric power station is
Options
Option A: Low operating cost
Option B: Free from pollution problems
Option C: No fuel transportation problems
Option D: All of the above
Correct Answer
All of the above
Solution & Explanation
{"type":"technical","methodBadge":"Concept & Principle","explanation":"Hydro-electric power stations utilize the potential energy of water stored in a reservoir to generate electricity. These stations are highly efficient, environmentally friendly, and economically viable due to the absence of fuel procurement and transportation costs.","workingPrinciple":"Water from a high-altitude reservoir flows through a penstock to a hydraulic turbine, converting potential energy into mechanical energy. The turbine rotates a coupled alternator, which converts the mechanical energy into electrical energy based on Faraday's law of electromagnetic induction. The efficiency is dependent on the head of water ($H$) and the flow rate ($Q$).","diagramSvg":"ReservoirTurbineGenerator","keyFormulas":["$P = \\eta \\rho g Q H$ тАФ Power output where $\\eta$ is efficiency, $\\rho$ is density, $g$ is gravity, $Q$ is discharge, and $H$ is head."],"keyPoints":["No combustion process occurs, leading to negligible greenhouse gas emissions.","Hydropower is a renewable energy source with low operating and maintenance costs.","The plant's lifespan is significantly longer than thermal or nuclear power plants.","Eliminates the logistical complexity of transporting massive quantities of fuel like coal."],"advantages":["Low operating and maintenance costs","Environmentally friendly (no air or thermal pollution)","No fuel transportation or storage logistics","High reliability and long operational life"],"disadvantages":["High initial capital investment for dam construction","Geographically dependent (requires specific site conditions)","Potential impact on local ecosystems and displacement of communities"],"applications":["Base load and peak load power generation","Grid stabilization via pump-storage systems"],"comparisonTable":[],"additionalInfo":["Hydro power is categorized as 'Green Energy' due to its minimal carbon footprint.","Option A is correct because of the lack of fuel cost; Option B is correct due to no combustion; Option C is correct as water is available on-site, hence D is the best fit."],"answer":"D is correct тАФ Hydro-electric power stations offer multiple economic and environmental benefits, including zero fuel logistics, low operating costs, and clean energy production.","correctedOptions":["Low operating cost","Free from pollution problems","No fuel transportation problems","All of the above"],"coreConcepts":["Potential energy conversion","Hydraulic turbine mechanics","Renewable energy systems"],"crossTopicTip":"When answering 'Advantage' questions for power plants, always verify if the options cover both economic (fuel/operation) and environmental (pollution) aspects to quickly identify 'All of the above' as the likely candidate."}