Civil Engineering (CE) Exam  >  Civil Engineering (CE) Questions  >  Statement I): Reciprocal levelling is adopted... Start Learning for Free
Statement I): Reciprocal levelling is adopted to decide the difference of level between two points, a considerable distance apart, with great precision.
Statement II): Reciprocal levelling eliminates errors due to curvature, refraction and collimation.
  • a)
    Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)
  • b)
    Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I)
  • c)
    Statement (I) is true but Statement (II) is false
  • d)
    Statement (I) is false but Statement (II) is true
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Statement I): Reciprocal levelling is adopted to decide the difference...
Reciprocal leveling is a technique used in surveying to determine the difference in elevation between two points that are a considerable distance apart. It involves taking readings with a level instrument at both points and then swapping the positions of the instrument and repeating the measurements. This process helps to eliminate errors and increase the accuracy of the leveling results.

Statement I states that reciprocal leveling is adopted to decide the difference of level between two points with great precision. This statement is true because reciprocal leveling is known for its high precision and accuracy in determining elevation differences. By taking readings from both points and then swapping the instrument, any errors or inconsistencies in the measurements can be identified and eliminated, resulting in more precise leveling results.

Statement II claims that reciprocal leveling eliminates errors due to curvature, refraction, and collimation. This statement is also true. Curvature refers to the slight curvature of the Earth's surface, which can cause errors in leveling measurements over long distances. Reciprocal leveling helps to eliminate these errors by averaging out the readings from both positions, effectively minimizing the impact of curvature.

Refraction is the bending of light as it passes through different mediums, such as the Earth's atmosphere. This bending can cause errors in leveling measurements, especially when the line of sight is near the ground. Reciprocal leveling helps to mitigate these errors by taking readings from both positions and averaging them out, reducing the impact of refraction.

Collimation refers to any misalignment or error in the line of sight of the leveling instrument. Reciprocal leveling helps to eliminate collimation errors by swapping the positions of the instrument and repeating the measurements. If there is any collimation error, it will be apparent from the inconsistency in the readings between the two positions.

In conclusion, both Statement I and Statement II are individually true, and Statement II is the correct explanation of Statement I. Reciprocal leveling is a precise technique that eliminates errors due to curvature, refraction, and collimation, resulting in accurate elevation measurements over long distances.
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Community Answer
Statement I): Reciprocal levelling is adopted to decide the difference...
Reciprocal levelling is adopted to accurately determine the level difference between two points which are separated by obstacles like a river, ponds, lakes, etc.
It eliminates the following errors:
i) error in instrument adjustments i.e error due to collimation
ii) the combined effect of Earth's curvature and the refraction of the atmosphere
iii) variation in the average refraction
Important Points:
Reciprocal levelling eliminates the error due to collimation and error due to curvature of Earth completely, but as the refraction depends upon the atmosphere which may change every minute;
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Statement I): Reciprocal levelling is adopted to decide the difference of level between two points, a considerable distance apart, with great precision.Statement II): Reciprocal levelling eliminates errors due to curvature, refraction and collimation.a)Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)b)Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I)c)Statement (I) is true but Statement (II) is falsed)Statement (I) is false but Statement (II) is trueCorrect answer is option 'A'. Can you explain this answer?
Question Description
Statement I): Reciprocal levelling is adopted to decide the difference of level between two points, a considerable distance apart, with great precision.Statement II): Reciprocal levelling eliminates errors due to curvature, refraction and collimation.a)Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)b)Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I)c)Statement (I) is true but Statement (II) is falsed)Statement (I) is false but Statement (II) is trueCorrect answer is option 'A'. 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 Statement I): Reciprocal levelling is adopted to decide the difference of level between two points, a considerable distance apart, with great precision.Statement II): Reciprocal levelling eliminates errors due to curvature, refraction and collimation.a)Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)b)Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I)c)Statement (I) is true but Statement (II) is falsed)Statement (I) is false but Statement (II) is trueCorrect answer is option 'A'. 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 Statement I): Reciprocal levelling is adopted to decide the difference of level between two points, a considerable distance apart, with great precision.Statement II): Reciprocal levelling eliminates errors due to curvature, refraction and collimation.a)Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)b)Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I)c)Statement (I) is true but Statement (II) is falsed)Statement (I) is false but Statement (II) is trueCorrect answer is option 'A'. Can you explain this answer?.
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