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Equipments for Chain Survey - Chain Surveying, Surveying and Levelling | Surveying and Levelling Notes- Agricultural Engg - Agricultural Engineering PDF Download

6. EQUIPMENTS FOR CHAIN SURVEY

The following equipments are required for conducting chain survey:

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FAQs on Equipments for Chain Survey - Chain Surveying, Surveying and Levelling - Surveying and Levelling Notes- Agricultural Engg - Agricultural Engineering

1. What are the basic equipments required for chain surveying?
Ans. The basic equipments required for chain surveying include a chain, ranging rods, arrows, tape measure, plumb bob, compass, and a theodolite for more accurate measurements.
2. How is a chain used in chain surveying?
Ans. A chain is used in chain surveying to measure distances on the ground. It is a standardized measuring tool made of metal or fiberglass links, typically 66 feet long. The chain is laid on the ground and stretched taut between two points, and the distance is measured by counting the number of chain links used.
3. What are ranging rods used for in chain surveying?
Ans. Ranging rods are used to mark the points on the ground that are being surveyed. They are usually made of wood or metal and are painted in contrasting colors for better visibility. Ranging rods help the surveyor accurately identify and measure the points of interest.
4. Why is a plumb bob used in chain surveying?
Ans. A plumb bob is used in chain surveying to establish vertical reference lines. It consists of a pointed weight suspended from a string or wire. When the plumb bob is held above a point on the ground, the string aligns with the vertical direction due to gravity, allowing the surveyor to determine the exact location of the point.
5. How does a theodolite assist in chain surveying?
Ans. A theodolite is a more advanced instrument used in chain surveying to measure both horizontal and vertical angles. It consists of a telescope mounted on a tripod, equipped with a rotating base and graduated circles. By aligning the theodolite with specific points of interest, the surveyor can obtain precise angular measurements, which are crucial for accurate surveying and mapping.
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