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Q: To erect a perpendicular to chain line from a point on it
  • A. Ranging rod is used
  • B. 3-4-5 method is used
  • C. A levelling is used
  • D. Right angle is used
Correct Answer: Option B - Basic problems in chain survey–One of the problem faced in chain surveying is to draw or erect perpendicular to chain line from a point on it. • The three methods commonly used for this purpose with the help of a 10 m chain (or 20 m chain) are as follows– 1. The 3-4-5 method 2. Second method 3. Third method
B. Basic problems in chain survey–One of the problem faced in chain surveying is to draw or erect perpendicular to chain line from a point on it. • The three methods commonly used for this purpose with the help of a 10 m chain (or 20 m chain) are as follows– 1. The 3-4-5 method 2. Second method 3. Third method

Explanations:

Basic problems in chain survey–One of the problem faced in chain surveying is to draw or erect perpendicular to chain line from a point on it. • The three methods commonly used for this purpose with the help of a 10 m chain (or 20 m chain) are as follows– 1. The 3-4-5 method 2. Second method 3. Third method