# Civil Engineering - Surveying - Discussion

Discussion Forum : Surveying - Section 1 (Q.No. 37)
37.
The difference of level between a point below the plane of sight and one above, is the sum of two staff readings and an error would be produced equal to
the distance between the zero of gradient and the foot of the staff
twice the distance between the zero of graduation and the foot of the staff
thrice the distance between the zero of graduation and the foot of the staff
none of the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
8 comments Page 1 of 1.

Umair Ahmad said:   3 years ago
@Sameer Sopori.

Pleese elaborate it clearly.

Sameer sopori said:   6 years ago
The minor distance between the bottom graduation and staff bottom (graduation is usually like E shapes on staff, each arm of E equal to 1cm on staff) , For each station we need to take 2 reading at least FS & BS, and for each station we need to deduction the error (because its cumulative error). However, it's very small error and it remains always under tolerance.

Sunny said:   6 years ago
Please give an explanation.

Aung san said:   6 years ago
Please explain.

Ritu said:   6 years ago
Someone Please explain clearly.

Choudhary Sumit Saharan said:   6 years ago
Explain it.

Deepak said:   7 years ago
Please explain this.

Dusty said:   7 years ago
Anyone explain the solution clearly.

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