Meisterprüfung Hafner Practice Questions - Meisterprüfung Hafner (Austria) Exam

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Under ÖNORM EN 15544, how is the minimum combustion chamber surface area (Feuerraum-Innenoberfläche A_OF) calculated as a function of the wood fuel charge mass B?

A_OF ≥ 900 * B^0.57 (with A_OF in cm² and B in kg) A_OF = 250 * B (linear relationship in cm² per kg) A_OF = 100 * B² (quadratic power curve in cm²) A_OF ≤ 450 * √B (square root curve with upper cap)

Correct Answer:

A_OF ≥ 900 * B^0.57 (with A_OF in cm² and B in kg)

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