Civil Engineering - Surveying - Discussion
Discussion Forum : Surveying - Section 3 (Q.No. 19)
19.
The main plate of a transit is divided into 1080 equal divisions. 60 divisions of the vernier coincide exactly with 59 divisions of the main plate. The transit can read angles accurate upto
Discussion:
23 comments Page 3 of 3.
Sourabh said:
3 years ago
All the explanations are correct assuming:
1 degree = 1hour equivalent.
So, we write 1° 00' 00"= 3600 secs.
1 degree = 1hour equivalent.
So, we write 1° 00' 00"= 3600 secs.
(2)
Sandip Mondal said:
2 years ago
We know that the total angle of the lower plate is 360 degrees.= 360 * 3600 second = 12,96,000 second.
The lower plate is divided into 1080 divisions.
So each division is =12,96,000/1080 second = 1200 second =1200".
We know the least count = d/n =( 1200"/60)= 20".
Here, d= value of the smallest division of the main scale.
n = number of divisions of Vernier scale.
The lower plate is divided into 1080 divisions.
So each division is =12,96,000/1080 second = 1200 second =1200".
We know the least count = d/n =( 1200"/60)= 20".
Here, d= value of the smallest division of the main scale.
n = number of divisions of Vernier scale.
(9)
Biswanath said:
2 weeks ago
It's 360 * 60/1080 = 20.
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