Civil Engineering - Surveying - Discussion

Discussion Forum : Surveying - Section 6 (Q.No. 44)
44.
Pick up the correct statement from the following :
an observation or the resulting reading with the level on a levelling staff is called sight
a back sight is the first sight taken after setting up the instrument in any position
the first sight on each change point is a fore sight
the second sight on each change point is a back sight
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
11 comments Page 2 of 2.

Inayat Ullah Kakar said:   11 months ago
Ist reading = back sight.
Condition: only in case of after setting up the instrument in any position of known elevation (benchmark).
Ist sight= foresight
2nd sight back sight.
Condition: only in the case of each change point.
So, the given answer is correct.
(1)


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