Question:
The rod staff level reading taken on a point of known elevation is called
The rod staff level reading taken on a point of known elevation is called
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Back Sight = First reading (looking back at where you know). Fore Sight = Last reading (looking ahead to where you want to know).
Updated On: May 5, 2026
- Plane sight
- Fore sight
- Back sight
- Short sight
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The Correct Option is C
Solution and Explanation
Step 1: Concept
In leveling, we must start from a point where the elevation is already known (a Benchmark).
Step 2: Meaning
We use this known point to establish the Height of the Instrument (HI).
Step 3: Analysis
The first reading taken after setting up the leveling instrument is always taken on this known point. This specific reading is called a back sight (BS).
Step 4: Conclusion
The reading on a known elevation point is the back sight.
Final Answer: (C)
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