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In setting up a plane table at any station.
- a)orientation is done first.
- b)centering is done first
- c)levelling is done first
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
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In setting up a plane table at any station.a)orientation is done first...
The correct order for setting up a plane table at a station is leveling, centering, and then orientation. However, leveling is done first, and centering and orientation can be done simultaneously.
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In setting up a plane table at any station.a)orientation is done first...
Understanding Plane Table Setup
Setting up a plane table involves a systematic process to ensure accurate surveying. The correct order of operations is crucial for obtaining reliable measurements.
Why Levelling is Done First
- Stability and Accuracy:
- Levelling ensures that the plane table is horizontal. This stability is critical for accurate readings.
- Foundation for Other Operations:
- Once the table is level, it can serve as a reliable base for both centering and orientation.
The Steps in Plane Table Setup
1. Levelling:
- Adjust the legs of the plane table until the level bubble indicates that the surface is horizontal.
2. Centric Positioning:
- After levelling, the table must be centered over the survey station. This involves aligning the table with the point of interest on the ground.
3. Orientation:
- Finally, the table is oriented to match the desired direction (usually towards a known point), allowing for accurate angle measurements.
Conclusion
In summary, levelling the plane table first is essential to ensure that subsequent operations like centering and orientation yield accurate results. By following this sequence, surveyors can achieve reliable and precise survey data essential for any civil engineering project.
Setting up a plane table involves a systematic process to ensure accurate surveying. The correct order of operations is crucial for obtaining reliable measurements.
Why Levelling is Done First
- Stability and Accuracy:
- Levelling ensures that the plane table is horizontal. This stability is critical for accurate readings.
- Foundation for Other Operations:
- Once the table is level, it can serve as a reliable base for both centering and orientation.
The Steps in Plane Table Setup
1. Levelling:
- Adjust the legs of the plane table until the level bubble indicates that the surface is horizontal.
2. Centric Positioning:
- After levelling, the table must be centered over the survey station. This involves aligning the table with the point of interest on the ground.
3. Orientation:
- Finally, the table is oriented to match the desired direction (usually towards a known point), allowing for accurate angle measurements.
Conclusion
In summary, levelling the plane table first is essential to ensure that subsequent operations like centering and orientation yield accurate results. By following this sequence, surveyors can achieve reliable and precise survey data essential for any civil engineering project.
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In setting up a plane table at any station.a)orientation is done first.b)centering is done firstc)levelling is done firstd)None of theseCorrect answer is option 'C'. Can you explain this answer?
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