Indoor Air sciences CSMI Practice Exam

What measurements can be taken with a thermohygrometer?

1. Relative humidity and temperature

2. Thermal boundary measurements

3. Hydrostatic and dynamic pressure

4. Temperature and sensible heat

The correct answer is: Relative humidity and temperature

A thermohygrometer is specifically designed to measure both relative humidity and temperature in the air. This instrument combines the functions of a thermometer, which measures temperature, and a hygrometer, which measures the amount of moisture in the air. The data provided by a thermohygrometer can help in various applications such as assessing indoor air quality, comfort levels, and the potential for mold growth, as relative humidity plays a critical role in these considerations. The other options listed relate to different types of measurements that cannot be obtained with a thermohygrometer. Thermal boundary measurements typically involve assessing heat flow and insulation effectiveness, which is outside the capability of a thermohygrometer. Hydrostatic and dynamic pressure measurements pertain to fluids in motion or at rest, generally requiring pressure sensors rather than humidity or temperature readings. Lastly, while temperature is measured, sensible heat—which refers to heat that causes a change in temperature of a substance—requires additional calculations and equipment to determine the heat transfer associated with the temperature, which a thermohygrometer does not measure directly.