2. Turn the gas regulator valveâs knob to âPilot,â press down on it and hold it down. This starts the flow of gas to the pilot burner. On some water heater models, you press and hold down a separate red button to start the pilot burner gas flow.. Turn the gas regulator valveâs knob to âPilot,â press down on it and hold it down. This starts the flow of gas to the pilot burner. On some water heater models, you press and hold down a separate red button to start the pilot burner gas flow.
Definition of Conduction. the result of collisions between molecules; when one end of an object is heated, the molecules vibrate faster and the energy is transferred to their neighbors. Definition for Conduction :1. Thermal conduction the transfer of heat between two solid materials that are physically touching each other.2.
Conduction. 1  Conduction is the transfer of thermal energy through direct contact between particles of a substance, without moving the particles to a new location. 2  Usually occurs in solids.3  When heat is supplied to one end, molecules at that end start to move more quickly.onvection. 1  Convection is the transfer of thermal energy through movement of particles from one location to another. 2  Usually occur in fluids (liquids and gases). 3  Example with boiling water: 4  Water at bottom of pan is heated first. 5  Heated water expands and density decreases.