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Q: According to IS 287 : 1993, in classifying timber, the average annual relative humidity (%) of Zone IV region of India is more than:
  • A. 50
  • B. 40
  • C. 60
  • D. 67
Correct Answer: Option D - According to IS 287: 1993 in classifying timber the average annual relative humidity (%) of zone (IV) region of India is more than- 67% there are four zone in India Annual average relative- Zone I– less than 40% Zone II– 40–50% Zone III– 50–67% Zone IV– > 67%
D. According to IS 287: 1993 in classifying timber the average annual relative humidity (%) of zone (IV) region of India is more than- 67% there are four zone in India Annual average relative- Zone I– less than 40% Zone II– 40–50% Zone III– 50–67% Zone IV– > 67%

Explanations:

According to IS 287: 1993 in classifying timber the average annual relative humidity (%) of zone (IV) region of India is more than- 67% there are four zone in India Annual average relative- Zone I– less than 40% Zone II– 40–50% Zone III– 50–67% Zone IV– > 67%