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Q: The instrument which is not used in chain survey is
  • A. Ranging Rod
  • B. Cross Staff
  • C. Offset Rod
  • D. Levelling Staff
Correct Answer: Option D - Ranging rod– Ranging rods have a length of either 2 m or 3 m. The 2 meter length being more common. Offset rods– An offset rod is similar to a ranging rod and has a length of 3m. Cross staff– The simplest instrument used for setting out right angle is a cross staff. Levelling staff– A levelling staff is a straight rectangular rod having graduations, the foot of the staff representing zero reading. It is used in levelling work.
D. Ranging rod– Ranging rods have a length of either 2 m or 3 m. The 2 meter length being more common. Offset rods– An offset rod is similar to a ranging rod and has a length of 3m. Cross staff– The simplest instrument used for setting out right angle is a cross staff. Levelling staff– A levelling staff is a straight rectangular rod having graduations, the foot of the staff representing zero reading. It is used in levelling work.

Explanations:

Ranging rod– Ranging rods have a length of either 2 m or 3 m. The 2 meter length being more common. Offset rods– An offset rod is similar to a ranging rod and has a length of 3m. Cross staff– The simplest instrument used for setting out right angle is a cross staff. Levelling staff– A levelling staff is a straight rectangular rod having graduations, the foot of the staff representing zero reading. It is used in levelling work.