Question
Geomatics Engineering Question on Principles of surveying
At a fixed instrument location in levelling, if the backsight reading at a point P is more than the foresight reading at a point Q, then
A
point P has lower elevation than point Q
B
point P has higher elevation than point Q
C
the elevation difference between P and Q depends on height of the instrument
D
the elevation difference between P and Q depends on benchmark elevation
Answer
point P has lower elevation than point Q
Explanation
Solution
The correct answer is (A) : point P has lower elevation than point Q