Which instrument is used for heat stress surveys on the ship?

Which instrument is used for heat stress surveys on the ship?

• A. WBGT
• B. Thermometer
• C. Anemometer
• D. Hygrometer

Answer: (A)

Heat stress surveys rely on a single metric that combines several environmental factors driving how hot it feels to a person. The instrument that does this is WBGT, which blends natural wet-bulb temperature (reflecting humidity and evaporative cooling), globe temperature (capturing radiant heat from sun and hot surfaces), and the ambient dry-bulb air temperature. By integrating these elements, WBGT provides a practical measure of heat load and associated risk, which is essential for setting safe work-rest schedules and protective measures on a ship where radiant heat, sun exposure, and ventilation can vary widely. In contrast, a thermometer only measures air temperature, a hygrometer only measures humidity, and an anemometer only measures wind speed; none alone capture the full heat stress picture. So WBGT is the best instrument for heat stress surveys.

Heat stress surveys rely on a single metric that combines several environmental factors driving how hot it feels to a person. The instrument that does this is WBGT, which blends natural wet-bulb temperature (reflecting humidity and evaporative cooling), globe temperature (capturing radiant heat from sun and hot surfaces), and the ambient dry-bulb air temperature. By integrating these elements, WBGT provides a practical measure of heat load and associated risk, which is essential for setting safe work-rest schedules and protective measures on a ship where radiant heat, sun exposure, and ventilation can vary widely. In contrast, a thermometer only measures air temperature, a hygrometer only measures humidity, and an anemometer only measures wind speed; none alone capture the full heat stress picture. So WBGT is the best instrument for heat stress surveys.