QUESTION
Objective Question
Which of the following instrument is/are used for chaining?
I. Ranging rods
II. Plumb bob
III. Chain or Tape
Answer
( Option D)
I, II and III
Solution
All three instruments are used in chaining (chain surveying / linear measurement with chain or
tape):
Chain or Tape (III) — Primary instrument for measuring horizontal distances.
Ranging rods (I) — Used to mark intermediate points and keep the measurement line straight (ranging).
Plumb bob (II) — Used to transfer points vertically to the ground (especially on sloping ground) and to check the verticality of ranging rods.
