The order of stages of conducting an engineering survey for highway alignment is i. Preliminary Survey ii. Reconnaissance Survey iii. Final Location and detailed survey iv. Map study
- A(i), (iv), (ii), (iii)
- B(ii), (iv), (i), (iii)
- C(iv), (ii), (i), (iii)Correct
- D(ii), (i), (iv), (iii)
Solution
Concept
Stages of engineering survey for highway alignment
Formula
NONE
Step-by-step solution
1. Highway alignment surveys begin with a Map study (iv) of existing topographic features. 2. This is followed by Reconnaissance Survey (ii) of candidate routes, then Preliminary Survey (i), and finally Final Location and detailed survey (iii). 3. The correct sequence is iv, ii, i, iii. Answer: C
Explanation
Engineering surveys for a new highway alignment follow a systematic order starting with a preliminary map study using existing topographic charts. Next, a reconnaissance survey involves field visits to inspect feasible routes identified during the map study. This is followed by a preliminary survey to collect detailed technical data, concluding with the final location and detailed survey for actual construction, making option C correct.
Why the other options are wrong
A) Map study must be conducted prior to the preliminary survey. B) Reconnaissance survey should take place after the initial map study. D) Map study is the first stage in highway alignment surveys and must precede reconnaissance.
Shortcut
Highway alignment survey sequence: Map study -> Reconnaissance -> Preliminary -> Final location (MRPF).
Common mistake
Selecting option A or B by assuming Reconnaissance Survey precedes Map Study or Preliminary Survey comes before Reconnaissance.
Correct answer: C) (iv), (ii), (i), (iii)