World Geography
The main objective of multi-purpose river projects are

flood controls and making rivers navigable
power generation by constructing hydro power stations
All of these
extension of irrigation facilities by constructing dams to store surplus water during the rainy seas

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World Geography
The texture of a soil refers to

the distribution of mineral particles in the soil
the size distribution of the mineral particles composing the soil
the crystal distribution in soil
None of these

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World Geography
The initial increase of magnetic field in magnetic storms is caused

when the shock wave, associated with the gusty solar wind, compresses the magnetosphere
when there is a large decrease in field intensity
None of these
when the gust wind itself engulfs the magnetosphere

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