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

Step 1: Check statement (A). Keeping survey lines as few as possible is a genuine rule for choosing stations, because every extra line is an extra chance to introduce measurement error, so surveyors use the minimum number of lines that still cover the plot properly. (A) is correct.

Step 2: Check statement (B). In triangulation and chain survey work, one long base line is deliberately run through the middle of the area, and the triangles are built up on this line so the framework spreads over the major part of the plot. (B) is correct.

Step 3: Check statement (D). Well conditioned triangles, meaning no angle is too small or too large (ideally each angle stays between 30 degrees and 120 degrees), are essential because a badly shaped, very thin triangle turns a tiny angular error into a large error in the plotted position. (D) is correct.

Step 4: Check statement (C). This one is wrong. The actual rule is the opposite of what is written: offsets should be kept as short as possible, and this matters most for important features, because a long offset is harder to measure squarely and drags more error into the located point. So (C) is false.

Step 5: Check statement (E). This is also wrong. The guiding principle of surveying is work from the whole to the part, not from the part to the whole. You first fix a strong, accurate overall framework (the whole), and only afterwards add the smaller details inside it (the part). Working the other way lets small starting errors grow larger as the survey spreads outward. So (E) is false.

Step 6: Only (A), (B) and (D) hold up as correct statements, which is option 3.