Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Line ranger is use for___
Setting out right angles
Offsets
Ranging
Chaining
Ranging
A line ranger is a survey instrument specifically designed to perform 'ranging', which is the process of establishing intermediate points on a straight line between two terminal points. It ensures that the alignment remains true and is critical for accurate linear measurements in chain surveying.
A line ranger is a survey instrument specifically designed to perform 'ranging', which is the process of establishing intermediate points on a straight line between two terminal points. It ensures that the alignment remains true and is critical for accurate linear measurements in chain surveying.
L=тИСliтАЛ тАФ Total length of a line is the summation of individual measured segments during ranging
The line ranger operates on the principle of double reflection using two prisms (usually pentaprisms) placed one above the other. When viewed through the instrument, the surveyor sees two images of the terminal ranging rods; the instrument is moved laterally until the images appear in perfect vertical alignment, confirming the instrument lies on the true survey line.
A line ranger allows a single surveyor to locate intermediate points without assistance from others.
It is significantly faster than the conventional 'ranging by eye' method.
The instrument uses optical prisms to achieve line alignment through reflection.
It is effectively used in undulating terrain where terminal points are not intervisible.
High accuracy in establishing straight lines.
Eliminates the need for a second person to hold the ranging rod at the intermediate point.
Can be affected by poor visibility or dusty conditions.
Requires periodic calibration to ensure the internal prisms are at a true 90-degree/specified angle.
Highway and railway alignment surveys.
Establishing grid lines for site layout.
Ensuring straightness in long chain lines.
A line ranger is specifically built to speed up the process of ranging, not for measuring angles (like a theodolite) or offsets (like an optical square).
Option A is incorrect because optical squares or prisms are used for right angles, not a line ranger.
Option B is incorrect as offsets are measured perpendicular to the chain line.
Option D is incorrect as chaining is the physical measurement of distance.
C is correct тАФ Line ranger is a specialized survey instrument utilized exclusively for the process of ranging.
Always distinguish between 'Ranging' (fixing points on a line) and 'Offsetting' (locating points perpendicular to a line); they are distinct operations in chain surveying.