Maximum tolerable limit for heat is -: (A) 30 HSI, (B) 50 HSI, (C) 80 HSI, (D) 100 HSI
Answer is D. Park's textbook of preventive and social medicine 23rd edition. *Heat stress index values - no thermal stress -30. _ moderate to mild heat strain -60 _ severe heat strain -90 _ very severe heat strain _ upper limit of heat tolerance.