Surveying - Engineering

Q1:

During levelling if back sight is more than foresight

A The forward staff is at lower point

B The back staff is at lower point

C The difference in level, cannot be ascertained.

D none of these.

ANS:B - The back staff is at lower point

Suppose we are doing levelling on an elevated area so if the reading comes on the staff of B.S is 20m and F.S comes 15m through the help of intermediate side so off course B.S is at a low level. If staff reading is more it means the point is at lower level. Here the B.S is more so the point is at lower level.