Rajasthan JEN (Degree) – Shift II
⭕ A. Orientation
⭕ B. Setting
⭕ C. Levelling
⭕ D. Centering
📚 Explanation:
The process of aligning the plane table drawing with the actual directions and objects on the ground is known as orientation.
🔹 This ensures that all plotted lines on the sheet remain parallel to their corresponding ground directions.
🔹 Orientation can be achieved using methods like back sighting or through compass alignment.
🔹 Other operations like setting (placing and fixing the table), levelling (making it horizontal), and centering (aligning over a station) are separate preliminary steps in plane table surveying.
The process of aligning the plane table drawing with the actual directions and objects on the ground is known as orientation.
🔹 This ensures that all plotted lines on the sheet remain parallel to their corresponding ground directions.
🔹 Orientation can be achieved using methods like back sighting or through compass alignment.
🔹 Other operations like setting (placing and fixing the table), levelling (making it horizontal), and centering (aligning over a station) are separate preliminary steps in plane table surveying.
👉 Therefore, the correct answer is: A. Orientation
Key Concepts in Plane Table Surveying Orientation:
- Ensures drawing matches actual ground layout
- Uses compass or previous station reference
- Essential step for accurate plane table plotting
- Follows levelling and centering
- Important in field surveying operations
