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Q: In ordinary chain survey the maximum permissible error is
  • A. 1 in 250
  • B. 1 in 1000
  • C. 1 in 2000
  • D. 1 in 5000
Correct Answer: Option B - Degree of accuracy in chaining– • For measurement with invar tape, spring, balance, thermometer, etc. 1 in 10,000. • For ordinary measurement with steel tape, plumb bob, chain pins etc 1 in 1000. • For measurement made with chain under average conditions 1 in 500. • For measurement with chain on rough or hilly ground 1 in 250.
B. Degree of accuracy in chaining– • For measurement with invar tape, spring, balance, thermometer, etc. 1 in 10,000. • For ordinary measurement with steel tape, plumb bob, chain pins etc 1 in 1000. • For measurement made with chain under average conditions 1 in 500. • For measurement with chain on rough or hilly ground 1 in 250.

Explanations:

Degree of accuracy in chaining– • For measurement with invar tape, spring, balance, thermometer, etc. 1 in 10,000. • For ordinary measurement with steel tape, plumb bob, chain pins etc 1 in 1000. • For measurement made with chain under average conditions 1 in 500. • For measurement with chain on rough or hilly ground 1 in 250.