The primary way water extinguishes fire is by: Absorbing heat.
What is the primary way that water extinguishes fire?
The primary way water extinguishes fire is by: absorbing heat. The energy required to raise the temperature of a substance by one degree is called: Specific Heat.
What characteristic of water makes it valuable for fire extinguishment?
93 Cards in this Set
|Characteristics of water that make it valuable for fire extinguishment include:||C. a greater heat-absorbing capacity than other agents.|
|The primary way water extinguishes fire is by:||A. absorbing heat.|
|The energy required to raise the temperature of a substance by one degree is called:||A. Specific Heat.|
Which is a characteristic of water as an extinguishing agent?
Water has a higher specific heat than most common substances, and this is one of the reasons it is such an effective extinguishing agent. Think of how much energy it takes to heat a liter of water to a boiling point every time you put on a kettle.
What is the primary manual application technique used on aboveground storage tank fires?
The rain-down method is the primary manual application technique used on aboveground storage tank fires.
What is convection of fire?
It is the type of heat one feels when sitting in front of a fireplace or around a campfire. … Convection is the transfer of heat by the physical movement of hot masses of air. As air is heated, it expands (as do all objects). As it expands, it becomes lighter then the surrounding air and it rises.
How does water control fire?
Water cools and smothers the fire at the same time. It cools it so much that it can’t burn anymore, and it smothers it so that it can’t make any more of the oxygen in the air explode.
When water fog is used as an extinguishing agent the fire is extinguished principally by the?
Water and foam fire extinguishers extinguish the fire by taking away the heat element of the fire triangle. Foam agents also separate the oxygen element from the other elements. Water extinguishers are for Class A fires only; they should not be used on Class B or C fires.
What is the main advantage of a steady stream of water on a Class A fire?
Water effectively puts out a fire by cooling the fuel (burning combustibles) to a point below the temperature at which the fire can continue to burn or reignite.
What type of fire should water be used on?
WATER. Water fire extinguishers have a red label and a class A rating. They are suitable for fighting fires involving solid combustibles such as wood, paper and textiles.
What classification of portable fire extinguisher is used for fires that involve combustible liquids?
Class B. Class B fires involve flammable and combustible liquids such as gasoline, alcohol, oil-based paints, lacquers. Therefore, extinguishers with a B rating are designed to extinguish fires involving flammable and combustible liquids.
Which extinguishing agent should be used for a Class D fire quizlet?
A Class D fire should be extinguished using a: Select one: – carbon dioxide extinguisher. – clean agent extinguisher.
Does hot water extinguish fire?
Hot water readily converts to steam absorbing enormous amounts of heat and therefore hot water is better for fire extinguishing purposes than cold water.
Which method of proportioning foam uses the pressure energy in the stream of water to draft foam concentrate into the hose stream?
Induction. The induction, sometimes referred to as eduction, method of proportioning foam uses the pressure energy in the stream of water to induct (draft) foam concentrate into the fire stream.
Which technique for applying Class B foam is used primarily?
Gentle application is mostly used on class B polar solvent liquid fires (water-miscible). The foam is applied first onto a vertical surface (wall, tank…). The foam then spreads carefully above the burning liquid surface. The foam blanket formed will avoid fuel agitation and foam contamination by the fuel.
Which type of extinguisher is intended to be used on a Class B fire?
CO2: A carbon dioxide fire extinguisher works on a Class B fire by expelling CO2 to suffocate the fire, removing the oxygen necessary to keep it burning.