Civil Engineering - UPSC Civil Service Exam Questions - Discussion

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

[A]. 357° 50'
[B]. 356° 50'
[C]. 3° 10'
[D]. 2° 10'

Answer: Option A

Explanation:

No answer description available for this question.

Lara said: (Jul 10, 2017)  
Explain the answer please.

Roy said: (Jul 22, 2017)  
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.

Faisal said: (Nov 22, 2018)  
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: (Jan 6, 2019)  
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?

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