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How many types of EDM are there based on the reflector type?(a) 3(b) 5(c) 4(d) 2I got this question in a national level competition.My question is based upon EDM topic in chapter Basic Surveying of Basic Civil Engineering

Answer»

Right answer is (a) 3

Explanation: The 3 types are active, PASSIVE and no REFLECTOR. In active TYPE, power is required to OPERATE reflectors. In passive type, a prism reflector is used.



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