Which term describes the outside temperature read by a thermometer hung in a shaded area away from equipment?

• A. Ambient Temperature
• B. Surface Temperature
• C. Equipment Temperature
• D. Air Temperature

Answer: (D)

The key idea is measuring the environmental air temperature, not a surface or the equipment’s temperature. When a thermometer is hung in shade away from heat sources, it reads the temperature of the surrounding air, which is the figure used to gauge field conditions for asphalt work, affecting mix handling, compaction, and cooling. Surface temperature would reflect heat absorbed or radiated by a specific surface and can be much higher or lower depending on sun exposure or material properties. Equipment temperature would indicate heat from machinery rather than the ambient air.