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Q: Which statement is true for chain surveying?
  • A. They are formed of straight links of galvanized mild steel wires
  • B. To facilitate easy reading of the chain, brass tallies are provided
  • C. It is to be noted that length of a link is the distance between centers of two consecutive middle rings
  • D. All of these
Correct Answer: Option D - Surveying chain– A surveying chain or simply a chain is commonly used for measurement of distances where a very high accuracy is not required. A chain consists of a number of large links made of galvanized mild steel wire of 4 mm diameter. To enable the reading of fraction of a chain length without difficulty, brass tallies (or tags) and rings are attached to the chain at some fixed interval, for 10 m long chain, brass tallies are fixed at every meter of the chain. The shape of tallies at 1 m, 2 m, 3 m, 4 m and 5 m.
D. Surveying chain– A surveying chain or simply a chain is commonly used for measurement of distances where a very high accuracy is not required. A chain consists of a number of large links made of galvanized mild steel wire of 4 mm diameter. To enable the reading of fraction of a chain length without difficulty, brass tallies (or tags) and rings are attached to the chain at some fixed interval, for 10 m long chain, brass tallies are fixed at every meter of the chain. The shape of tallies at 1 m, 2 m, 3 m, 4 m and 5 m.

Explanations:

Surveying chain– A surveying chain or simply a chain is commonly used for measurement of distances where a very high accuracy is not required. A chain consists of a number of large links made of galvanized mild steel wire of 4 mm diameter. To enable the reading of fraction of a chain length without difficulty, brass tallies (or tags) and rings are attached to the chain at some fixed interval, for 10 m long chain, brass tallies are fixed at every meter of the chain. The shape of tallies at 1 m, 2 m, 3 m, 4 m and 5 m.