What is the fire behavior triangle?
The Fire Behavior Triangle. Just like there is a fire triangle, made up of heat, oxygen, and fuel, there is another triangle called the fire behavior triangle. The three legs of this triangle are fuels, weather, and topography. The sections below go more in depth into each of thise and their influence on fire.
What does it mean when a fire crowns?
Crown fires—burn through the top layer of foliage on a tree, known as the canopy. Crown fires, the most intense type of fire and often the most difficult to contain, need strong winds, steep slopes, and a heavy fuel load to continue burning.
Why do a controlled burn?
Controlled burns are lit for a number of reasons. By ridding a forest of dead leaves, tree limbs, and other debris, a prescribed burn can help prevent a destructive wildfire. Controlled burns can also reduce insect populations and destroy invasive plants. In addition, fire can be rejuvenating.
What is dangerous fire behavior?
Oxygen availability A low concentration of oxygen will slow the burning right down. An example of dangerous fire behaviour that can occur in a situation where there is a low concentration of oxygen is called backdraught. This is when an enclosed fire has used up most of the oxygen and is just smouldering.
What is the hottest phase of fire?
Fully Developed – When the growth stage has reached its max and all combustible materials have been ignited, a fire is considered fully developed. This is the hottest phase of a fire and the most dangerous for anybody trapped within.
Why does my light ballast not turn on?
One clue that your ballast is the reason for a non-working fluorescent light is the light bulbs struggle to turn on. As I said in the intro, we noticed this happening over a 3-4 week period. A good way to check that your ballast is the culprit is to turn on a voltage detector and hold it next to the wires supplying power to the ballast.
What happens when you hit the gas pedal at the last light?
You’re running a little late, but sitting in pole position at the last light before hitting your employee parking lot. So when the stoplight turns from red to green, you punch the gas pedal, hoping to sail through the intersection a little, um, faster than usual. But instead of moving when you hit the gas pedal, your car hesitates.
What does it mean when a fluorescent light ballast is dead?
If power is going into the ballast and none is flowing to the fluorescent light bulbs this is an indicator the ballast is dead – unfortunately much like the cool old guy named Blue in Old School (for all you Will Ferrell fans, Blue the character dies while, ahem, wrestling!!)
Why does my pilot light not turn on?
If your pilot light is working but the main burner doesn’t turn on, the problem is probably the thermostat. This is a common issue that many homeowners overlook. Make sure the thermostat is on and that the current room temperature is below the thermostat setting.