Civil Engineering - Surveying - Discussion

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

[A]. the distance between the zero of gradient and the foot of the staff
[B]. twice the distance between the zero of graduation and the foot of the staff
[C]. thrice the distance between the zero of graduation and the foot of the staff
[D]. none of the above.

Answer: Option B

Explanation:

No answer description available for this question.

Dusty said: (Oct 16, 2016)  
Anyone explain the solution clearly.

Deepak said: (Feb 15, 2017)  
Please explain this.

Choudhary Sumit Saharan said: (Jun 17, 2017)  
Explain it.

Ritu said: (Dec 24, 2017)  
Someone Please explain clearly.

Aung San said: (Mar 7, 2018)  
Please explain.

Sunny said: (Apr 22, 2018)  
Please give an explanation.

Sameer Sopori said: (May 1, 2018)  
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.

Umair Ahmad said: (May 1, 2021)  
@Sameer Sopori.

Pleese elaborate it clearly.

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