GATE CE 2016 Set 1 — Question 35
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Geomatics Engineering → Levelling → Height of Instrument Method
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Question
The staff reading taken on a workshop floor using a level is 0.645 m. The inverted staff reading taken to the bottom of a beam is 2.960 m. The reduced level of the floor is 40.500 m. The reduced level (expressed in m) of the bottom of the beam is
Correct answer
(A) 44.105
Solution
Given:
Reduced Level (RL) of the floor = 40.500 m
Staff reading on the floor (Backsight, BS) = 0.645 m
Inverted staff reading to the bottom of the beam (Foresight, FS) = -2.960 m (Inverted readings are taken as negative in standard height of instrument calculations).Step 1: Calculate the Height of Instrument (HI).
mStep 2: Calculate the RL of the bottom of the beam.
mAlternatively, m.Thus, the correct option is (A).
Reduced Level (RL) of the floor = 40.500 m
Staff reading on the floor (Backsight, BS) = 0.645 m
Inverted staff reading to the bottom of the beam (Foresight, FS) = -2.960 m (Inverted readings are taken as negative in standard height of instrument calculations).Step 1: Calculate the Height of Instrument (HI).
mStep 2: Calculate the RL of the bottom of the beam.
mAlternatively, m.Thus, the correct option is (A).
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