Surveying - Study Mode
[#246] The number of horizontal cross wires in a stadia diaphragm is
Correct Answer
(C) three
Explanation
Solution: 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 .
[#247] Different grades are joined together by a
Correct Answer
(D) Vertical curve
[#248] If in a closed traverse, the sum of the north latitudes is more than the sum of the south latitudes and also the sum of west departures is more than the sum of the east departures, the bearing of the closing line is in the
Correct Answer
(B) SE quadrant
[#249] In triangulation surveys
Correct Answer
(D) All the above
[#250] If $$ heta $$ and $$delta $$ be the latitude of a place and declination of a star respectively, the upper culmination of the star will be north of zenith if its zenith distance, is
Correct Answer
(A) $$delta - heta $$