S-190 task sheet

Summarize how each of the three methods of heat transfer (Conduction, Confection and radiation) supply heat to start a fire.

Radiation- Waves Conduction- Gives heat from direct touch Convection-Gives heat through air movement

Describe how slope can affect a fire's rate of spread.

Fires burn more rapidly uphill than downhill because the fuels above the fire are brought into closer contact with the upward moving flames.

Identify how many feet are in a chain.

66ft

Explain the reason for establishing an anchor point.

An anchor point needs to be established because it's the best place to fight fire, it won't move and you are most likely on already burned fuel.

Describe what effect an incoming cold front may have on fire behavior.

An incoming cold front increases fire behavior, spot fires, erratic fires, uncontrollable and gusty winds.

Conduction

Gives heat from direct touch.

Convection

Gives heat through air movement.

Name the three sides of a fire triangle

Oxygen, heat & fuel

Explain the inverse relationship between temperature and relative humidity.

Relative humidity goes up when the temperature goes down.

Explain the difference between dry bulb and wet bulb temperatures.

The dry bulb temperature is the ambient air temperature that is measured by regular thermometers, while the wet bulb temperature is measured by thermometers that are wrapped in wetted wicks.

Differentiate the characteristics of the fuels found on a north aspect from those found on a south aspect.

The north is less fire active than the south because the north fuels are a lot bigger and takes more energy to burn.

Radiation

Waves

Tell the evaluator what direction a north wind is coming from.

You'd be facing north.