Fossil Fuels
Telangana Board · Class 10 · Environmental Education
Flashcards for Fossil Fuels — Telangana Board Class 10 Environmental Education. Quick Q&A cards covering key concepts, definitions, and formulas.
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What are fossil fuels? Give three examples commonly used in Indian households.
Answer
Fossil fuels are exhaustible sources of energy formed from ancient organic matter. Three common examples used in Indian households are: 1) Coal - for heating and electricity generation, 2) Kerosene - …
Why are fossil fuels called 'exhaustible' resources?
Answer
Fossil fuels are called exhaustible because they have limited reserves on Earth and cannot be renewed quickly. According to current data: Oil reserves will last 45 years, Gas reserves 72 years, and Co…
List the main uses of fossil fuels in daily life.
Answer
Main uses include: 1) Cooking - LPG, kerosene, coal, 2) Transportation - petrol and diesel for vehicles, 3) Electricity generation - burning coal in power plants, 4) Heating - coal and kerosene for ro…
How much LPG gas is wasted if you keep the stove on for 1 hour without cooking?
Answer
Approximately 7.25 grams of LPG gas is wasted per hour when the stove is kept on without cooking. This shows the importance of putting on the stove only after arranging all necessary cooking items.
What percentage of fuel can be saved by using pressure cookers compared to other cooking methods?
Answer
Pressure cookers can save: 20% fuel when cooking rice and 41.5% fuel when cooking meat compared to other cooking methods. This makes pressure cookers highly fuel-efficient cooking appliances.
Why should you soak food materials before cooking? How much fuel does it save?
Answer
Soaking food materials before cooking saves 22% of fuel because pre-soaked items cook faster, requiring less heating time. This is especially effective for rice, dal, and legumes.
What happens when mineral deposits form in pressure cookers and how does it affect fuel consumption?
Answer
Undissolved minerals get deposited as layers in pressure cookers. Even a 1mm thick layer requires 10% extra fuel for cooking. Therefore, pressure cookers must be cleaned regularly to maintain fuel eff…
Compare the fuel efficiency of small burners versus big burners.
Answer
Small burners are more fuel-efficient than big burners, saving 6.5% more fuel. This is because small burners provide adequate heat with less gas consumption, making them ideal for most cooking needs.
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