The height of instrument is equal to
A)reduced level of bench mark + back sight
B)reduced level of bench mark + fore sight
C)reduced level of bench mark + intermediate sight
D)back sight + fore sight

Question

Quizplus · Accepted Answer

The height of instrument (HI) is calculated by adding the back sight (BS) reading to the reduced level (RL) of the benchmark. This gives the elevation of the instrument's line of sight.

The Height of Instrument Is Equal to