Civil Engineering - Surveying - Discussion
Discussion Forum : Surveying - Section 2 (Q.No. 14)
14.
The desired sensitivity of a bubble tube with 2 mm divisions is 30". The radius of the bubble tube should be
Discussion:
18 comments Page 2 of 2.
Roy said:
8 years ago
Thanks @Pinku.
Shailendrabsingh said:
9 years ago
Angle = arc/radius or =(d/r) radians.
Because 1 Radian = 206265 second.
So, = (d/r) * 206265 second.
Given that d = 2mm or 2 * 10^-3m.
So, ={(2 * -10^-3) * 206265}÷ r.
Then @ = 412.53÷r.
Given, 30second.
So r = 412.53÷30,
r = 13.75meter.
Because 1 Radian = 206265 second.
So, = (d/r) * 206265 second.
Given that d = 2mm or 2 * 10^-3m.
So, ={(2 * -10^-3) * 206265}÷ r.
Then @ = 412.53÷r.
Given, 30second.
So r = 412.53÷30,
r = 13.75meter.
(1)
Pinku said:
9 years ago
2mm deflect with a small change of angle 30''
30'' ---> 2mm
60'' ---> 4mm
1' ---> 4mm.
For 360degree ---> 360 * 60 * 4.
So, 2 * 3.14 * r = 360 * 60 * 4.
r = 13.75.
30'' ---> 2mm
60'' ---> 4mm
1' ---> 4mm.
For 360degree ---> 360 * 60 * 4.
So, 2 * 3.14 * r = 360 * 60 * 4.
r = 13.75.
Rupayan Lahiri said:
9 years ago
@ Sameer Kashmiri.
There is a mistake in the third line of your comment. It will be 360 * 240 = 86400.
There is a mistake in the third line of your comment. It will be 360 * 240 = 86400.
Sameer Kashmiri said:
9 years ago
If 30 = 2mm.
Then 1 =60" =4mm.
Then 1degree = 60 * 4 = 240mm.
It means 360 degree = 360 * 40 = 86400mm.
= 86.4 m.
R = L/2 * 3.14.
R = 86.4/2 * 3.14.
R = 13.75 m.
Then 1 =60" =4mm.
Then 1degree = 60 * 4 = 240mm.
It means 360 degree = 360 * 40 = 86400mm.
= 86.4 m.
R = L/2 * 3.14.
R = 86.4/2 * 3.14.
R = 13.75 m.
Anshul said:
10 years ago
1 radian = 206, 265 seconds.
Chinna said:
1 decade ago
How to taken *206265 value?
Rajni kant said:
1 decade ago
Sensitivity = [l*206265]/R.
R = ((2/1000)*206265)/30 = 13.75.
R = ((2/1000)*206265)/30 = 13.75.
(1)
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