Question : In hydel power station, the motion produced in turbines is due to:
Option 1: flow of water
Option 2: burning of coal
Option 3: burning of diesel
Option 4: production of steam
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Correct Answer: flow of water
Solution : The correct option is flow of water.
The flow of water generates motion in turbines in a hydel (hydroelectric) power station. Pipes carry water from a river or reservoir to the turbines. When high-pressure water meets the turbine blades, they revolve. This mechanical action is subsequently converted into electrical energy by driving a generator. Because the flow of water drives the whole process, hydropower plants are an efficient and renewable method of energy generation.
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Question : Which of the following fuels causes the least environmental pollution?
Option 1: Diesel
Option 2: Kerosene
Option 3: Hydrogen
Option 4: Coal
Question : Arsenic problem in India is primarialy due to
Option 1: Overexplotitation of coal in Bihar and Bengal
Option 2: Overexploitationn of arsenopyrite in the hinterland
Option 3: Overexploitation of ground water in the affected areas
Option 4: Overexploitation of surface water in the affected areas
Question : Burning of coal is an example of_________.
Option 1: decomposition reaction
Option 2: double displacement reaction
Option 3: combination reaction
Option 4: displacement reaction
Question : A geyser is a spring which
Option 1: throws water continuously
Option 2: throws water intermittently
Option 3: throws water and steam at regular intervals
Option 4: throws only steam
Question : Burns caused by steam are much severe than those caused by boiling water because
Option 1: Steam pierces through the pores of body quickly
Option 2: Steam has latent heat
Option 3: Steam is gas and engulfs the body quickly
Option 4: Temperature of steam is higher
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