This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
Which of the following used for recording very low air velocity 
Select and explain. 
A. Globe thermometer, B. Kata thermometer, C. Anemometer, D. Sling psychrometer
B: Kata thermometer
Answer: B: Kata thermometer 
Explanation: Globe thermometer is used for Radiant temperature Kata Thermometer is also used for temperature measurement and is less sensitive to air velocity Anemometer is used to measure the velocity of the wind Psychrometer is used to measure humidity Park's Textbook of Preventive and Social Medicine, 25th Edition, Pg 810