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How many types of cross staff are available?(a) 2(b) 5(c) 3(d) 4I have been asked this question by my school principal while I was bunking the class.This intriguing question originated from Chain Surveying in division Basic Surveying of Basic Civil Engineering

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Right ANSWER is (C) 3

For EXPLANATION: The three types are open CROSS staff, French cross staff and adjustable cross staff. Open cross staff has two vertical, opposite slits. French cross staff consists of a hollow octagonal box. The adjustable cross staff consists of two cylinders of equal diameter, one PLACED on top of the other.



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