Firefighting Tools and Equipment Quiz

Questions and Answers

What is the primary function of the Wet Water Anti-Siphon Sprayer?

To connect multiple hoses for water supply

To create a fan spray for larger areas

To increase water pressure for better fire control

To apply wet water in impractical situations (correct)

How is the metering disk on the Wet Water Anti-Siphon Sprayer typically set?

At #1 for normal operation (correct)

At #2 for greater flow

It is adjustable and does not have a fixed setting

At #3 for fine misting

What size intake manifold is commonly associated with portable monitors?

3 inch

4 inch

2-1/2 inch (correct)

1-1/2 inch

What type of lines are connected to a portable monitor to supply water?

One 4 inch line connected to a gated wye Signup and view all the answers

What should be done to the lines of the Wet Water Proportioner after use?

They should be flushed with fresh water Signup and view all the answers

What feature helps shape the stream in a portable monitor's barrel?

Diffusing vanes Signup and view all the answers

What is essential to consider regarding the nozzle reaction of a portable monitor?

The nozzle must be directed toward the fire before opening shut-offs Signup and view all the answers

What type of sprayers are mentioned in conjunction with traditional fire methods like ladderpipes?

Portable monitors Signup and view all the answers

What is the recommended ratio of Light water concentrate to fresh or seawater for the solution?

6 parts concentrate to 94 parts water Signup and view all the answers

Which type of foam is not suitable for use on polar solvents?

AFFF foams Signup and view all the answers

What is the main purpose of the Wet Water Proportioner in fire fighting?

To automatically meter a wetting agent into a fire stream Signup and view all the answers

What safety precautions should be taken with respect to the wetting agent used in the Wet Water Proportioner?

It is very corrosive and slippery Signup and view all the answers

In what situations is the Wet Water Proportioner especially useful?

In overhaul operations involving Class A combustibles Signup and view all the answers

What is the primary function of water distributors in fire fighting?

To distribute water evenly across a wide area Signup and view all the answers

What is the water flow capacity of the 2-1/2 Bresnan distributor?

600 to 800 gpm Signup and view all the answers

Which size siphon ejector is NOT used by the LAFD?

3 inch Signup and view all the answers

What is the primary purpose of the air-pressure type extinguisher?

To extinguish ordinary combustibles (class A fires) Signup and view all the answers

How is water expelled from the air-pressure type extinguisher?

By releasing built-up air pressure Signup and view all the answers

How can the effectiveness of the water spray be enhanced when using an air-pressure extinguisher?

By placing a finger over the nozzle Signup and view all the answers

What is the diameter of the area that the 2-1/2 Bresnan distributor can effectively cover?

30 ft Signup and view all the answers

What can siphon ejectors be used for besides fire fighting?

Dewatering operations Signup and view all the answers

Study Notes

Wet Water Tools and Equipment

Wet Water Proportioner: Automatically mixes a wetting agent with water, designed for variable flow in firefighting. Used for effective water penetration into materials during overhaul operations, reducing water's surface tension. Requires careful handling due to the corrosive nature of the wetting agent.
Wet Water Anti-Siphon Sprayer: Utilized when the proportioner isn’t practical. Features a metering nozzle, typically set at #1, and operates at about 40 psi. Attaches to a garden hose for application.
Portable Monitors: Heavy stream appliances with a 2-1/2” intake and clapper valves. Connects to one 4" line and then two 2-1/2" lines for effective water flow. Helps manage nozzle reaction by stabilizing the appliance before opening shut-offs.
Light Water / AFFF (Aqueous Film Forming Foam): Synthetic foam that forms a 6% solution (6 parts concentrate to 94 parts water) and is particularly effective for gasoline fires but ineffective on polar solvents. Alcohol Type Concentrate (ATC) is preferred for such fires, and it utilizes special educators for application.
Distributors: Operate through openings in structures to extinguish fires. The 2-1/2" Bresnan distributor can cover a 30-foot diameter with a flow rate of 600 to 800 gallons per minute, utilizing nine orifices.
Siphon Ejectors: Used for dewatering and firefighting. Available in three sizes: 2-1/2", 1-1/2", and 1". Key for operations requiring significant water removal or application.
Air-Pressure Extinguisher: A 2-1/2-gallon capacity extinguisher effective on ordinary combustibles (class A fires). Operated by maintaining air pressure (90-110 psi) to expel water efficiently when the valve is opened, allowing for better control of water distribution by using finger-over-nozzle technique for spray conversion.

Maintenance Guidelines

All lines must be flushed with fresh water post-use to prevent clogs and ensure longevity of the equipment.

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Description

Test your knowledge on various firefighting tools and equipment, including wet water proportioners and portable monitors. This quiz covers their functions, applications, and operation techniques essential for effective firefighting. Understand how these resources aid in managing fire incidents safely and efficiently.