Tag: rules are for everyone
Questions Related to rules are for everyone
Bio-gas can be converted into _______.
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Fuel
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Electricity
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Fertilizer
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Both A and B
Material recovery is possible from industrial waste. Organic waste can be used for energy production with various processes such as bio-gas production.
Common energy source in villages is
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Electricity
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Coal
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Biogas
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Wood and animal dung
An inexhaustible non-conventional universal source of energy is
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Wind energy
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Solar energy
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Hydrothermal energy
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Tidal energy
Solar energy is considered to be the non-conventional because it is not derived from the conventional fossil fuels. It is inexhaustible as it will not be used up completely. It will not take much time in regeneration. It is universal as most of the places on earth that sustain a large population get the sunlight. Wind energy is also non-conventional and inexhaustible but it is not available to every area. It can be harnessed in areas that witness a low pressure, like equatorial and tropical areas. Similarly, the tidal energy is available to the coastal areas. Hydrothermal resources are available everywhere but need a heavy economic investment for their usage.
Photovoltaic cells are semiconductors of
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Silicon
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Gallium arsinide
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Cadmium telluride
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All of the above
Photovoltaic cells are used in trapping solar energy. These are made of semiconductors that can lose the electrons when exposed to the sunlight to generate the electric current. The semiconductor material used can be silicon, gallium arsenide, cadmium telluride. Silicon is the most preferred because of its uniform crystalline structure. Cadmium Telluride provides a low-cost alternative that is also highly absorptive of solar energy. Gallium arsenide is used for its resistance to the harmful effects of the radiations. It is generally used for space photovoltaic cells.
Solar energy can be trapped through
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Direct heating
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Thermoelectric conversion
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Photovoltaic conversion
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All of the above
Solar energy can be trapped through the following:
The interior of a cow-dung pile kept for a few days is quite warm. This is mostly because
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Cellulose present in the dung is a good insulator .
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Bacterial metabolism inside the dung releases heat.
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Undigested material releases heat due to oxidation by air.
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Dung is dark and absorbs a lot of heat.
At the later stages of decomposition of cowdung, mesophilic micro-organisms decompose the dung, generating heat from exothermic( process which produces heat) processes; such heat generation is associated with the well known phenomenon of the elevated temperature of composting.
Geo-thermal energy is a conventional source of energy.
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True
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False
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Nither
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Either
Which one of the following is a non-replenishable resource?
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minerals
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forests
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mineral fuel
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hydroelectricity
Which of the following is non-renewable resource?
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Forest
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Coal deposit
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Water
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Wild life
Fossil fuels are nonrenewable conventional energy resources found inside the earth's crust where they have been formed through heat and compression on forests and other organic matter buried underneath due to earthquakes, landslides, lava etc. Fossil fuels can be solid, e.g., coal; liquid, e.g., petroleum; or gaseous, e.g., natural gas.
Non-renewable source is
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Water and gas
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Plant and coke
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Coal and mineral substances
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Energy and water