Q.1. Choose the incorrect statement MCQ - Source of Energy
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| (a) It is expected to harness wind power to minimum in open space. |
(b) The potential energy content of wind blowing at high altitudes is the source of wind power.
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(c) Wind hitting at the blades of a windmill causes them to rotate. The rotation thus achieved can be utilized further
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(d) One possible method of utilizing the energy of rotational motion of the blades of a windmill is to run the turbine of an electric generator.
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Ans (b)
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Q.2. Acid rain happens because:
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(a) sun leads to heating of upper layer of atmosphere.
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(b) burning of fossil fuels release oxides of carbon, nitrogen and sulphur in the atmosphere.
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(c) electrical charges are produced due to friction amongst clouds.
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(d) earth atmosphere contains acids.
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Ans . (b)
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Q.3. In a hydro power plant
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(a)potential energy possessed by stored water is converted into electricity.
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(b) kinetic energy possessed by stored water is converted into potential energy.
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(c) electricity is extracted from water.
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(d) water is converted into steam to produce electricity.
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Ans. (a)
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Q.4. which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilization?
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(a)nuclear energy (b) thermal energy
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(c) solar energy (d) geothermal energy
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Ans. (c)
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Q.5. Which of the following is a non-renewable source of energy?
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(a)wood (b)sun
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(c)fossil fuels (d) wind
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Ans .(c)
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Q.6. Ocean thermal energy is due to
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(a) energy stored by waves in the ocean
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(b) temperature difference at different levels in the ocean
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(c) Pressure difference at different levels in the ocean.
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(d) Tides arising out in the ocean.
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Ans(b)
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Q.7. the major problem in harnessing nuclear energy is how to:
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(a) Split nuclei.
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(b) Sustain the reaction.
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(c) Dispose off spent fuel safely.
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(d) Convert nuclear energy into electrical energy.
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Ans.(c)
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Q.8. which is the ultimate source of energy?
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(a) water (b) sun (c ) uranium (d) fossil fuels
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Ans. (b)
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Q.9. The main constituent of biogas is
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(a) Methane (b) carbon dioxide (c) hydrogen (d)hydrogen sulphide.
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Ans.(a)
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Q.10. the power generated in a windmill:
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(a) Is more in rainy season since damp air would mean more air mass hitting the blades.
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(b) Depends on the height of the tower.
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(c) Depends on wind velocity.
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(d) Can be increased by planting tall trees close to the tower.
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Ans. (c)
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Q.11. choose the correct statement:
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(a)Sun can be taken as an inexhaustible source of energy.
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(b) There is infinite storage of fossil fuel inside the earth.
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(c) Hydro and wind energy plants are non polluting sources of energy. (d) Waste from a nuclear power plant can be easily disposed off.
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Ans.(a)
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Q12. which part of the solar cooker is responsible for green house effect?
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(a) coating with black colour inside the box (b) mirror
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(c) glass sheet. (d) outer cover of the solar cooker
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Ans.(c)
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Q.13. In a hydroelectric power plant more electrical power can be generated if water falls from a greater height because:
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(a) its temperature increases.
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(b) larger amount of potential energy is converted into kinetic energy.
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(c) the electricity content water increases with height.
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(d) more water molecules dissociate into ions.
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Ans. (b).
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Q.14. choose the incorrect statement:
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(a) We are encouraged to plant more trees so as to ensure clean environment and also provide bio-mass fuel.
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(b) Gober-gas is produced when crops,vegetable wastes etc.,decompose in the absence of oxygen.
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(c) The main ingredient of bio-gas is ethane and it gives a lot of smoke and also produces a lot of residual ash.
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(d) Bio-mass is a renewable source of energy.
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Ans.(c)
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Q.15. Fuel used in thermal power plants is
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(a) water (b) uranium (c) biomass (d) fossil fuels
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Ans. (d)
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