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For which of the following permanent adjustments of theodolite, the spire test is used ?
- a)adjustment of plate levels
- b)adjustment of line of sight
- c)adjustment of horizontal axis
- d)adjustment of altitude bubble and vertical index frame
Correct answer is option 'C'. Can you explain this answer?
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For which of the following permanent adjustments of theodolite, the sp...
The Spire Test in Theodolite Adjustment:
The Spire Test is used for the permanent adjustment of the horizontal axis of theodolite. The adjustment of the horizontal axis is very important because it affects the accuracy of angular measurements. The spire test is a simple and effective method for the adjustment of the horizontal axis.
Steps Involved in Spire Test:
The following steps are involved in the spire test:
1. Set up the theodolite:
The first step in the spire test is to set up the theodolite at a suitable distance from the spire. The distance should be such that the angle subtended by the spire is at least 20 minutes of arc.
2. Take the readings:
The next step is to take the readings of the spire. The readings should be taken on both sides of the vertical axis of the theodolite.
3. Calculate the mean:
After taking the readings, the mean of the two readings should be calculated. The mean should be taken as the true direction of the spire.
4. Rotate the theodolite:
The theodolite should be rotated by 180 degrees and the readings should be taken again. The mean of the two readings should be calculated again.
5. Compare the means:
The two means should be compared. If there is any difference in the means, it indicates that the horizontal axis of the theodolite is not adjusted properly.
6. Adjust the horizontal axis:
If there is any difference in the means, the horizontal axis of the theodolite should be adjusted until the means are the same.
Conclusion:
In conclusion, the spire test is used for the permanent adjustment of the horizontal axis of theodolite. The spire test is a simple and effective method for the adjustment of the horizontal axis. By following the above steps, the horizontal axis of theodolite can be adjusted properly.
The Spire Test is used for the permanent adjustment of the horizontal axis of theodolite. The adjustment of the horizontal axis is very important because it affects the accuracy of angular measurements. The spire test is a simple and effective method for the adjustment of the horizontal axis.
Steps Involved in Spire Test:
The following steps are involved in the spire test:
1. Set up the theodolite:
The first step in the spire test is to set up the theodolite at a suitable distance from the spire. The distance should be such that the angle subtended by the spire is at least 20 minutes of arc.
2. Take the readings:
The next step is to take the readings of the spire. The readings should be taken on both sides of the vertical axis of the theodolite.
3. Calculate the mean:
After taking the readings, the mean of the two readings should be calculated. The mean should be taken as the true direction of the spire.
4. Rotate the theodolite:
The theodolite should be rotated by 180 degrees and the readings should be taken again. The mean of the two readings should be calculated again.
5. Compare the means:
The two means should be compared. If there is any difference in the means, it indicates that the horizontal axis of the theodolite is not adjusted properly.
6. Adjust the horizontal axis:
If there is any difference in the means, the horizontal axis of the theodolite should be adjusted until the means are the same.
Conclusion:
In conclusion, the spire test is used for the permanent adjustment of the horizontal axis of theodolite. The spire test is a simple and effective method for the adjustment of the horizontal axis. By following the above steps, the horizontal axis of theodolite can be adjusted properly.
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For which of the following permanent adjustments of theodolite, the sp...
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For which of the following permanent adjustments of theodolite, the spire test is used ?a)adjustment of plate levelsb)adjustment of line of sightc)adjustment of horizontal axisd)adjustment of altitude bubble and vertical index frameCorrect answer is option 'C'. Can you explain this answer?
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For which of the following permanent adjustments of theodolite, the spire test is used ?a)adjustment of plate levelsb)adjustment of line of sightc)adjustment of horizontal axisd)adjustment of altitude bubble and vertical index frameCorrect answer is option 'C'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about For which of the following permanent adjustments of theodolite, the spire test is used ?a)adjustment of plate levelsb)adjustment of line of sightc)adjustment of horizontal axisd)adjustment of altitude bubble and vertical index frameCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For which of the following permanent adjustments of theodolite, the spire test is used ?a)adjustment of plate levelsb)adjustment of line of sightc)adjustment of horizontal axisd)adjustment of altitude bubble and vertical index frameCorrect answer is option 'C'. Can you explain this answer?.
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