Meisterprüfung Heizungstechnik Practice Questions - Meisterprüfung Heizungstechnik (Austrian Master Craftsman Examination In Heating & Ventilation Engineering) Exam

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What is the physical meaning and standard unit of the thermal transmittance coefficient (Wärmedurchgangskoeffizient or U-value)?

The thermal resistance per unit length of pipe insulation, in m·K/W The total linear heat loss per meter of structural thermal bridge, in W/(m·K) The heat flow rate per unit area through a building component per Kelvin temperature difference between adjacent air layers, in W/(m²·K) The radiation absorption factor of an external facade surface, dimensionless

Correct Answer:

The heat flow rate per unit area through a building component per Kelvin temperature difference between adjacent air layers, in W/(m²·K)

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