Civil Engineering MCQAE Level Civil Engineering
In compass surveying, local attraction is detected by checking
SurveyingGeneralMEDIUM
Choose the correct answer
A
staff reading only
B
chain pull only
C
fore bearing and back bearing difference
D
contour gradient only
Correct Answer
C. fore bearing and back bearing difference
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FB and BB should differ by 180 degrees if free from local attraction.
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