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Q: The method of reciprocal ranging can be used in which of the following cases?
  • A. Obstacle to chaining but not ranging
  • B. Obstruction by a building
  • C. Obstruction by a river
  • D. Obstacle to ranging but not chaining
Correct Answer: Option A - Obstacles in chain Surveying:- (i) Obstacles in Ranging - In this type of obstacles the ends of the lines are not intervisible due to rising ground, hill or jungle. • In this Random line method is used. (ii) Obstacles in chaining (a) When the obstacles can be chained around example pond and lake (b) When the obstacle cannot be chained around example river. • In this Reciprocal Ranging method is used.
A. Obstacles in chain Surveying:- (i) Obstacles in Ranging - In this type of obstacles the ends of the lines are not intervisible due to rising ground, hill or jungle. • In this Random line method is used. (ii) Obstacles in chaining (a) When the obstacles can be chained around example pond and lake (b) When the obstacle cannot be chained around example river. • In this Reciprocal Ranging method is used.

Explanations:

Obstacles in chain Surveying:- (i) Obstacles in Ranging - In this type of obstacles the ends of the lines are not intervisible due to rising ground, hill or jungle. • In this Random line method is used. (ii) Obstacles in chaining (a) When the obstacles can be chained around example pond and lake (b) When the obstacle cannot be chained around example river. • In this Reciprocal Ranging method is used.