Question

Which points should be kept in mind while selecting the stations?

(A) The survey lines should be as few as possible.

(B) If possible, a base line should be run roughly through the middle of the area on which the framework of triangles covering the major portions of area may be built up.

(C) Offsets should be long particularly for locating the important features.

(D) All the triangles should be well conditioned.

(E) The main principle of surveying is to work from the part to the whole.

Choose the correct answer from the options given below:

• A. (A), (B) and (C) only.
• B. (B), (C) and (D) only.
• C. (A), (B) and (D) only.
• D. (C), (D) and (E) only.

Hint:

Two of the five statements reverse well known surveying rules about offset length and about whether you work whole-to-part or part-to-whole.

Answer 1

The Correct Option is C

Another way to handle this question is to recall the standard list of rules for selecting survey stations and tick off each statement against it.

The textbook rules are: use as few lines as possible, run one base line through the middle of the plot and build the triangle framework on it, keep every triangle well conditioned, avoid obtuse or very thin triangles, and keep offsets short, especially to important features, since short offsets are quicker and more accurate to lay out at right angles.

Matching this list against the five given statements: (A) matches as few lines as possible, true. (B) matches base line through the middle with the framework built on it, true. (D) matches well conditioned triangles, true. (C) says offsets should be long, the reverse of keep offsets short, so false. (E) says work from part to whole, the reverse of the actual principle work from whole to part, so false.

Only three statements survive the check, (A), (B) and (D), and this combination is listed as option 3.

\[\boxed{\text{Option 3: (A), (B) and (D) only}}\]