🔍 Key Concepts

• three primary methods of heat transfer on board a vessel • how air flow in ventilation ducts can move heat or smoke • difference between direct contact, fluid movement, and radiated energy

💭 Think About

• Ask yourself: Is the heat moving mainly through solid metal, through moving air, or by invisible rays from a hot surface? • Which method of heat transfer is most associated with circulating air or gases inside spaces like ventilation systems? • Eliminate the option that deals with heat traveling by direct contact between solids and the one that involves electromagnetic waves.

✅ Before You Answer

• Identify which choice is linked to moving fluids (liquids or gases). • Confirm which method would best describe hot smoke and gases traveling through ductwork. • Make sure you are not confusing heat carried by airflow with heat radiating in straight lines from a hot surface.