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Q: To determine the length of a bridge proposed to be built across a river, the survey method of choice would be :
  • A. tacheometry
  • B. chain survey
  • C. hydrographic survey
  • D. triangulation
Correct Answer: Option D - Triangulation- It is based on the principle that knowing one side and three angles the remaining side can be calculated precisely. • In triangulation all the angles and the base line are measured. • To determine the length of a bridge proposed to be built across a wide river. The survey method of choice would be triangulation. • For "third order triangulation system" the specification for length of base line is 0.5 to 3 km.
D. Triangulation- It is based on the principle that knowing one side and three angles the remaining side can be calculated precisely. • In triangulation all the angles and the base line are measured. • To determine the length of a bridge proposed to be built across a wide river. The survey method of choice would be triangulation. • For "third order triangulation system" the specification for length of base line is 0.5 to 3 km.

Explanations:

Triangulation- It is based on the principle that knowing one side and three angles the remaining side can be calculated precisely. • In triangulation all the angles and the base line are measured. • To determine the length of a bridge proposed to be built across a wide river. The survey method of choice would be triangulation. • For "third order triangulation system" the specification for length of base line is 0.5 to 3 km.