2. If L is the perimeter of a closed traverse, ?D is the closing error in departure, the correction for the departure of a traverse side of length l, according to Bowditch rule, is
Correct Answer: indefinite features to be surveyed.
8. If f1 and f2 are the distances from the optical centre of a convex lens of focal length f to conjugate two points P1 and P2 respectively, the following relationship holds good
10. Offsets are measured with an accuracy of 1 in 40. If the point on the paper from both sources of error (due to angular and measurement errors) is not to exceed 0.05 cm on a scale of 1 cm = 20 m, the maximum length of offset should be limited to