The 'Multiplying constant' used in the distance equation of stadia tacheometry is also known as ________.

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RRB JE CBT 2 (Civil Engineering) ReExam Official Paper (Held On: 04 Jun, 2025)
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  1. stadia interval factor
  2. stadia correction factor
  3. stadia correction constant 
  4. stadia hair constant

Answer (Detailed Solution Below)

Option 1 : stadia interval factor
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Explanation:

Note:- As per the RRB answer key, the correct answer is (d) but the correct answer is (a).

In stadia tacheometry, the distance equation is given by:

kC

Where:

  • = Horizontal distance from instrument to staff

  • = Staff intercept (difference between top and bottom stadia hair readings)

  • = Multiplying constant (also called stadia interval factor)

  • = Additive constant (includes instrument and focusing distances)

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