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Q: How many methods for eliminating the effects of local attraction?
  • A. One
  • B. Two
  • C. Three
  • D. Four
Correct Answer: Option B - Elimination of local attraction–If there is local attraction at a station, all the bearings measured at that place will be incorrect and the amount of error will be equal in all the bearings. • There are two methods for eliminating the effects of local attractions - (i) Starting from station free from local attraction. (ii) Using method of included angles.
B. Elimination of local attraction–If there is local attraction at a station, all the bearings measured at that place will be incorrect and the amount of error will be equal in all the bearings. • There are two methods for eliminating the effects of local attractions - (i) Starting from station free from local attraction. (ii) Using method of included angles.

Explanations:

Elimination of local attraction–If there is local attraction at a station, all the bearings measured at that place will be incorrect and the amount of error will be equal in all the bearings. • There are two methods for eliminating the effects of local attractions - (i) Starting from station free from local attraction. (ii) Using method of included angles.