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Question
Axis method of traverse correction is used when:
A.
The lengths are measured very accurately
B.
The angles are measured very accurately
C.
The percentage error in angles and lengths is same
D.
Neither angles nor lengths are measured accurately
Answer ( Option B)

The angles are measured very accurately

Solution

Axis method: 
(i) This method is used to balance a traverse where angles are measured more precisely than the lengths and thus this axis method is used for correction of lengths only. 
(ii) Since the angles are measured more precisely and therefore the direction of lines do not change much while applying the correction and thus the general shape of the traverse do not change much. 
(iii) In this method, the correction applied to any traverse line is expressed as (one half of closing error × Length of traverse line)/Axis length 

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