Question 234Safety & Environmental - Assistant Engineer

The correct answer is B) convection. The spreading of fire through a vessel's ventilation system is an example of heat transfer by convection. Convection is the transfer of heat through the movement of a fluid, such as air or water. In the case of a fire spreading through a ventilation system, the hot air and combustion gases are being carried through the system, spreading the heat and potentially the fire itself. The other answer choices are incorrect because: A) Conduction is the transfer of heat through direct contact between materials, which is not the mechanism by which the fire spreads through the ventilation system. C) Radiation is the transfer of heat through electromagnetic waves, which is not the primary mode of heat transfer in this scenario. D) Windage refers to the drag force acting on a vessel, which is not relevant to the heat transfer process in this case.