HKIE Professional Assessment - Fire Discipline Practice Questions - HKIE Professional Assessment - Fire Discipline (Hong Kong Institution Of Engineers) Exam

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A polyurethane fuel has an effective net heat of combustion delta H_c = 26 MJ/kg. If the fuel burns at a steady mass loss rate m_dot = 0.15 kg/s, calculate the total Heat Release Rate (Q) and the oxygen consumption rate assuming 13.1 MJ of energy per kg of O2 consumed (Thornton's Rule).

Q = 2.45 MW; O2 consumption rate = 0.18 kg/s Q = 3.90 MW; O2 consumption rate = 0.30 kg/s Q = 5.85 MW; O2 consumption rate = 0.45 kg/s Q = 7.80 MW; O2 consumption rate = 0.60 kg/s

Correct Answer:

Q = 3.90 MW; O2 consumption rate = 0.30 kg/s

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