Q
Which of the following errors can be eliminated by taking mean of bot face observations ?
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A
A. Error due to imperfect graduations
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B
B. Error due to eccentricity of verniers
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C
C. Error due to imperfect adjustment of plate levels
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D
D. Error due to line of collimation not being perpendicular to horizontal axis
Correct Answer:
D. D. Error due to line of collimation not being perpendicular to horizontal axis