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Every 20 m chain should be accurate to within
  • a)
    ± 8 mm
  • b)
    ± 2 mm
  • c)
    ± 5 mm
  • d)
    None of these
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Every 20 m chain should be accurate to withina)± 8 mmb)±...
As the chain is a metal made, it may undergo many changes due to temperature effect or human error and etc. So for all lengths of chain a tolerance is given:
1. 5 meter chain: + or – 3 mm
2. 10 meter chain: + or – 3 mm
3. 20 meter chain: + or – 5 mm
4. 30 meter chain: + or – 8 mm
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Every 20 m chain should be accurate to withina)± 8 mmb)±...
Every 20 m chain should be accurate to within 0.1 m.
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Every 20 m chain should be accurate to withina)± 8 mmb)±...
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