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Two successive Iso-hyetes in the basin drawing of catchment area are measured using _______(a) Planimeter(b) Manometer(c) Mass flow meter(d) ChronometerThis question was addressed to me at a job interview.Question is taken from Rainfall and its Measurement topic in chapter Hydro Electric Power Plant of Energy Engineering

Answer»

Right option is (a) PLANIMETER

Easiest explanation: GENERALLY interval of iso-hyete is one cm. after drawing the iso-hyetes; the area between two successive iso-hyetes is MEASURED by using a Planimeter. The rest of the procedure of finding out the MEAN rainfall is SIMILAR to that described in the second method.



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