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Q: In a ranging process, which instrument helps in aligning intermediate surveying points in a straight line between two main stations?
  • A. Cross staff
  • B. Optical square
  • C. Arrow
  • D. Ranging rod
Correct Answer: Option D - Ranging rod – Ranging rods are used to locate intermediate points such that these points lie on the straight line joining the end stations. Ranging is must before starting the measurement of a line whose length is more than a chain length such that the measurement is made along a straight line. • Ranging rods are 30 mm in diameter and 2 or 3 m long. • They are painted with alternate bands of either red and white or black and white of 200 mm height such that at sometimes the rod can also used for the rough measurement of short lengths.
D. Ranging rod – Ranging rods are used to locate intermediate points such that these points lie on the straight line joining the end stations. Ranging is must before starting the measurement of a line whose length is more than a chain length such that the measurement is made along a straight line. • Ranging rods are 30 mm in diameter and 2 or 3 m long. • They are painted with alternate bands of either red and white or black and white of 200 mm height such that at sometimes the rod can also used for the rough measurement of short lengths.

Explanations:

Ranging rod – Ranging rods are used to locate intermediate points such that these points lie on the straight line joining the end stations. Ranging is must before starting the measurement of a line whose length is more than a chain length such that the measurement is made along a straight line. • Ranging rods are 30 mm in diameter and 2 or 3 m long. • They are painted with alternate bands of either red and white or black and white of 200 mm height such that at sometimes the rod can also used for the rough measurement of short lengths.