| 1. | Which part of the solar cooker is responsible for greenhouse effect ? | |
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Outer cover of the solar cooker
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Glass sheet
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Mirror
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Coating with black colour inside the box
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Report Question| 2. | India exploded her first underground nuclear device at ? | |
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Jaipur
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Pokhran
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Kota
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Ranchi
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| 3. | Fuel used in thermal power plants is ? | |
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fossil fuels
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uranium
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water
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biomass
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| 4. | In a hydroelectric power plant more electrical power can be generated if water falls from a greater height because ? | |
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more water molecules dissociate into ions
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the electricity content of water increases with height
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larger amount of potential energy is converted into kinetic energy
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its temperature increases
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| 5. | The main constituent of CNG is ? | |
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propane
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ethane
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methane
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butane
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| 6. | Spent slurry (Bio-waste after obtaining biogas) is used as ? | |
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used again for generating biogas
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food for livestock
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manure
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fuel
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| 7. | Solar energy can be directly converted to electrical energy by which of the following devices ? | |
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solar heater
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solar cell
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solar cooker
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solar geyser
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| 8. | Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilisation ? | |
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Geothermal energy
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Solar energy
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Nuclear energy
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Thermal energy
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| 9. | The use of reflector in the solar cooker is to ? | |
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increase efficiency
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Decrease efficiency
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none of these
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create green house effect
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| 10. | Biogas is a better fuel than animal dung cake because ? | |
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biogas is used as a fuel for cooking only where as dung cake can be used for cooking, illuminant the lanterns.
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biogas bums smoke and leaves no residue
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animal dung cake has high calorific value
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biogas has lower calorific value.
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