1.

Which of the below is used up to a range of 100km?(a) Infrared(b) Microwave(c) Visible range(d) Ultra-violetThis question was addressed to me during an interview.Query is from EDM in portion Basic Surveying of Basic Civil Engineering

Answer»

Right choice is (B) Microwave

To explain I WOULD SAY: Microwave EDMs can be used up to a range of 100KM to locate the object. Infrared is a commonly used type, with a range up to 3KM.



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