The levelling should always commence from a temporary bench mak and end on a permanent bench mark.
A) Correct
B) Incorrect
Correct Answer:
Verified
Q11: When the cross-hairs are not clearly visible,
A)the
Q12: The angle between the back tangent and
Q13: The lines passing through points at which
Q14: A plumb bob is required
A)when measuring distances
Q15: The ratio of the focal length of
Q17: The obstacle, which obstructs vision but not
Q18: In plane surveying,
A)The curvature of the earth
Q19: Chain surveying is most suitable when
A)area to
Q20: The lines of earth's magnetic field run
Q21: The representative fraction 1 / 250° means
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