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Civil Engineering - Surveying - Discussion

Discussion Forum : Surveying - Section 6 (Q.No. 22)
Surveying
22.
In horizontal angles, the error due to imperfect levelling of the plate bubble is
large when sights are nearly level
large for long sights
less for steeply inclined sights
large for steeply inclined sights.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.
Kaido said:   4 years ago
Error due to imperfect levelling of the plate bubble will give rise to inclined in its vertical axis. And hence, the measured angle are not truly horizontal angle. So, Larger the vertical angle, greater the error in direction.
Kabi said:   7 years ago
Please explain the answer.
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