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Identify the incorrect statement:
  • a)
    Change point is a point denoting shifting of level
  • b)
    For levelling work both centering and levelling of a dumpy level prerequisite
  • c)
    Bench mark is a point whose RL is always known
  • d)
    None of these
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Identify the incorrect statement:a)Change point is a point denoting sh...
Bench mark is a permanent reference point whose R.L is always known to us.
It is our first step to adjust the level for its temporary adjustment (centering, levelling) before start to take reading from a level.
Change point is a point which denotes shifting of level either due to inability to take reading or due to some obstruction.
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Identify the incorrect statement:a)Change point is a point denoting sh...
Incorrect statement

The incorrect statement is option 'D', "None of these".

Explanation

a) Change point is a point denoting shifting of level: This statement is correct. A change point is a point on the ground where the level of the ground changes abruptly, and it requires a change in the level of the instrument.

b) For leveling work both centering and leveling of a dumpy level prerequisite: This statement is correct. For accurate leveling, both centering and leveling of a dumpy level are prerequisites. Centering involves placing the level over a point and leveling involves making the bubble of the level in the center of the vial.

c) Bench mark is a point whose RL is always known: This statement is correct. A benchmark is a point of known elevation. It is used as a reference point for leveling and surveying work.

d) None of these: This statement is incorrect as all the other statements are correct.

Conclusion

Therefore, the incorrect statement is option 'D', "None of these".
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Identify the incorrect statement:a)Change point is a point denoting shifting of levelb)For levelling work both centering and levelling of a dumpy level prerequisitec)Bench mark is a point whose RL is always knownd)None of theseCorrect answer is option 'D'. Can you explain this answer?
Question Description
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