Latent heat of vaporization of water (used in Kata thermometer calculation to measure effective temperature) is used to assess which environmental parameter?
- A Air pollution index
- B Cooling power of air — combining temperature, humidity, and wind velocity ✓
- C Radiation index for UV exposure
- D Groundwater temperature for safe drinking
Correct answer: B. Cooling power of air — combining temperature, humidity, and wind velocity
Explanation
The Kata thermometer measures the cooling power of the atmosphere — the rate at which the environment cools a thermometer from 38°C to 35°C. It combines the effects of air temperature, humidity, and air movement on heat loss from the body. A high Kata factor indicates good ventilation and cooling; a low factor indicates poor air movement. It is used to assess adequacy of ventilation in workplaces and assess heat stress risk.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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