Section 4: Soil and Water Conservation Engineering
Surveying and Levelling
Subtopic: Chain surveying, methods of traversing
Question Statement:
In chain surveying, to avoid acute intersecting angles and ensure high plotting accuracy, triangles in the framework should be well-conditioned, meaning no internal angle should be less than:
Options:
(A) $15^\circ$
(B) $30^\circ$
(C) $45^\circ$
(D) $60^\circ$
Answer Key:
B
Step-by-Step Solution & Explanation
A well-conditioned triangle is one in which the intersection of lines is clearly defined during plotting. The standard rule is that no angle should be less than $30^\circ$ nor greater than $120^\circ$.