The number of horizontal cross wires in a stadia diaphragm is
A. one
B. two
C. three
D. four
Answer: Option C
Solution (By Examveda Team)
A stadia diaphragm is a special part of a surveying instrument (like a theodolite or level).Its main purpose is to help determine distances.
The diaphragm has horizontal cross wires.
Typically, a stadia diaphragm contains three horizontal cross wires: one at the top, one in the middle (the central crosshair), and one at the bottom.
These wires are used to read the stadia intercept on a graduated staff held at a distance, which then helps calculate the distance.
Options A, B, and D are incorrect because stadia diaphragms are designed with three horizontal cross wires.
This Question Belongs to Civil Engineering >> Surveying
The correct answer is C. three. A stadia diaphragm has three horizontal cross wires: a central horizontal hair and upper and lower stadia hairs. The upper and lower stadia hairs are equidistant from the central horizontal hair. These hairs are used in tacheometric surveying to measure distances.
4
Two