Which of the following statement(s) is/are true? (i) Reconnaissance survey is conducted to get an idea about the terrain and any special and difficult features that may be encountered during a regular survey (ii) More precise instruments and methods are used for reconnaissance survey
- AOnly (i)Correct
- BOnly (ii)
- CBoth (i) and (ii)
- DNeither (i) nor (ii)
Solution
Concept
Reconnaissance survey purpose and instrument precision
Formula
NONE
Step-by-step solution
1. Statement (i) is true: Reconnaissance surveys provide a preliminary understanding of topography and obstacles. 2. Statement (ii) is false: Rapid, rough instruments (prismatic compass, hand level) are used, not high-precision instruments. 3. Therefore, only statement (i) is correct. Answer: A
Explanation
A reconnaissance survey is an initial, rapid field inspection conducted to gain an overview of the terrain, features, and obstacles before detailed surveying begins. Because it is an exploratory phase, simple and rapid handheld instruments are used rather than high-precision equipment. Hence, only statement (i) is true.
Why the other options are wrong
B) Statement (i) is correct and statement (ii) is false. C) Statement (ii) is false because precise instruments are reserved for detailed surveys. D) Statement (i) is true.
Shortcut
Reconnaissance = Rough & Rapid overview (simple tools); Detailed Survey = Precise instruments.
Common mistake
Assuming reconnaissance requires high-precision instruments rather than simple, preliminary reconnaissance tools.
Correct answer: A) Only (i)