Civil Engineering - UPSC Civil Service Exam Questions - Discussion
Discussion Forum : UPSC Civil Service Exam Questions - Section 10 (Q.No. 2)
2.
In an old map, line PQ was drawn to a magnetic bearing of 6°32', the magnetic declination at that time being 1° East. The present magnetic declination is 9°42' East. The magnetic bearing to which the line is set at present is
Discussion:
6 comments Page 1 of 1.
Roy said:
8 years ago
According to me, TB=MB (+/-) declination . So TB=6.32+1=7.32.
Now, mb=7.32-9.42= -2°10' I think as it is -2°10 so it is,
(360°-2°10)=357°50'..
Correct me, if I am wrong.
Now, mb=7.32-9.42= -2°10' I think as it is -2°10 so it is,
(360°-2°10)=357°50'..
Correct me, if I am wrong.
(1)
Lara said:
8 years ago
Explain the answer please.
Faisal said:
7 years ago
Yes, true bearing is equal to magnetic bearing (+-) declination - is used when west and + used when east so correct answer is A.
Karan Panjabi said:
7 years ago
The declination in both the case is EAST, so how it is possible to first add for magnetic declination and then subtract for the same EAST direction?
VEENA A MOHAN said:
5 years ago
@Karan.
First, we have found out true bearing.
TB is MB plus East declination always. (ie if E is given add if W is given subtract). Then you got TB. From that TB only u r gonna find the MB.
So, MB +Eis TB.
Here you need MB.ie TB -E.
First, we have found out true bearing.
TB is MB plus East declination always. (ie if E is given add if W is given subtract). Then you got TB. From that TB only u r gonna find the MB.
So, MB +Eis TB.
Here you need MB.ie TB -E.
John said:
3 years ago
The correct answer is 2° 10'.
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