What is an advantage of a smooth bore nozzle?

Asked by: Patrick Beck

Smooth bore nozzles outperform fog nozzles in that they have more operational benefits, which include: greater reach and better penetration. less nozzle reaction except for the 50-psi fog nozzle. less likelihood of being clogged by debris.

What is an advantage of a smooth bore nozzle quizlet?

Compared to fog nozzle streams, smooth-bore nozzle streams: absorb less heat.

What is an advantage of a fog nozzle?

Fog nozzles play an important part in firefighting tactics due to their versatility. The wide variety of fog nozzle manufacturers allows them to accommodate different sizes of fire hose—most often attack hand line—and streams and are capable in both fire protection and attack.

What do you pump a smooth bore nozzle at?

Smooth bore nozzles generate effective streams at nozzle pressures as low 30 PSI, but the stream will degrade at pressures over 60 PSI.

Can smooth bore nozzles be used to apply compressed air foam?

For applications of compressed air foam system (CAFS), a full-flow ball valve or smooth-bore nozzle can get the job done because larger discharge usually causes drier foams.

When used with a smooth bore nozzle a nozzle control valve that causes turbulence when partially open which can affect the quality of a fire stream is the?

When used with a smooth bore nozzle, a nozzle control valve that causes turbulence when partially open which can affect the quality of a fire stream is the: . ball valve.

What is an advantage of an automatic adjusting fog nozzle?

The advantage of using an automatic nozzle is that any flow can be delivered by the pump operator and still be controlled by the nozzle operator. Variable flow, constant nozzle pressure, and nozzleman flow control are three essential elements to successful fire streams and fire attack.

What are the differences between a fog nozzle and a smooth bore?

Smooth bore nozzles outperform fog nozzles in that they have more operational benefits, which include: greater reach and better penetration. less nozzle reaction except for the 50-psi fog nozzle. less likelihood of being clogged by debris.

What is an advantage of a straight stream over a fog stream?

What is an advantage of a straight stream over a fog stream? Longer reach. crews are working inside the building.

Which is an advantage of compressed air foam?

Because foam is a more efficient extinguishing agent than water, it allows firefighters to extinguish the fire quicker, which decreases their exposure time. Second, the high energy of a CAF stream provides a longer reach, allowing firefighters to operate farther away from the incident in a safer location.

Which is an advantage of compressed air foam quizlet?

Compressed air foam provides quicker knockdown times and minimizes FF exposure to immediately dangerous to life and health (IDLH) environments. The increased drain time of the CAFS allows water to be used more effectively while fire fighting. Due to its high-surface tension, water tends to run off of surfaces.

What is a benefit of class A foam?

The benefit to the firefighter is faster extinguishment, less water usage and less heat stress. The National Institute of Standards and Technology states that water treated with a Class A foam concentrate makes the water 3 to 5 times more efficient at fire extinguishment than untreated water.

What does CAFS mean on a fire truck?

compressed air foam system

A compressed air foam system (CAFS) is used in firefighting to deliver fire retardant foam for the purpose of extinguishing a fire or protecting unburned areas.

What is class B foam used for?

Class B Foam Agents are the ideal fire suppression choice for hazards involving flammable and combustible liquids. A foam blanket is formed that works to prevent the release of fuel vapor and separates the fuel from the air it needs to burn. The water content of the foam provides a cooling effect.

What is air foam made of?

Compressed-air foam (CAF) is generated by injecting air under pressure into a foam solution stream. The process of moving the solution and air mixture through the hose or piping. if done correctly, forms compressed-air foam.

What is Afff made of?

Aqueous film forming foams (AFFF) are water-based and frequently contain hydrocarbon-based surfactant such as sodium alkyl sulfate, and fluorosurfactant, such as fluorotelomers, perfluorooctanoic acid (PFOA), or perfluorooctanesulfonic acid (PFOS).

Why do firefighters use foam instead of water?

Class A foams are used to lessen the surface tension of water, which improves the wetting and saturation of water used to fight Class A fires, which are fueled by ordinary combustibles.

Is fire foam toxic?

Firefighting Foam Contains Toxic Forever Chemicals

Firefighting foam contains numerous toxic chemicals known as “forever chemicals.” These chemicals do not break down quickly and stay around for a long time. They are linked to a variety of chronic and disabling illnesses and conditions, especially cancers.

What is Class C fire?

Class C: Electrical equipment, appliances and wiring in which the use or a nonconductive extinguishing agent prevents injury from electrical shock. Don’t use water. Class D: Certain flammable metallic substances such as sodium and potassium.

What is foam extinguisher?

What is a foam fire extinguisher used for. AFFF (Aqueous Film Forming Foams) Foam Fire Extinguishers are suitable to fight burning solids such as wood as well as liquid fires such as burning petrol. The foam has the ability to creep over the burning liquid or to soak into burning materials such as settees.

What class is K fire?

Class K fires involve vegetable oils, animal oils, or fats in cooking appliances. Extinguishers with a K rating are designed to extinguish fires involving vegetable oils, animal oils, or fats utilized in commercial cooking appliances.

What is blue fire extinguisher?

The blue-labelled dry powder extinguishers are sometimes called ‘ABC’ extinguishers because they are used on class A, B and C fires. They shouldn’t be used in enclosed spaces because the powder can be easily inhaled and the residue is very difficult to clean.

What is a Class F fire?

Class F fires are fires which involve cooking oil or fat. Though technically a sub-class of fires caused by flammable liquids or gases, they differ from conventional fires due to the extremely high temperatures involved.

What is yellow fire extinguisher used for?

Wet Chemical fire extinguishers have a yellow label and are designed specifically for use on fires involving combustible cooking media such as burning oil and fat. They have a class F rating and a special lance applicator nozzle.