Kata thermometer is used to measure: September 2007

Ans. C: Air cooling power A kata thermometer measures the cooling power of the environment; it is used to estimate the personal comfo of workers. A spirit-in-glass thermometer it used: its bulb is heated to above body temperature, removed from the heat source and allowed to cool. The time taken for the thermometer reading to drop from above to below normal body temperature (e.g., from 38 degC to 35degC) is used to calculate the cooling power of the atmosphere, using a calibration factor F engraved on the thermometer by the manufacturer. Cooling power = F/(time of cooling).