EOG 300 pg 21-26 nozzles and foam

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Questions and Answers

What is the primary function of the fog tip on TFD high rise nozzles?

To maintain a constant nozzle pressure of 100 psi.

To provide a high-flow solid stream at low pressure.

To deliver a fixed flow rate of 150 gpm at 75 psi or greater. (correct)

To create a pattern similar to that of a solid bore nozzle.

How can a firefighter create a broken stream pattern resembling a medium fog using a solid bore nozzle?

By slightly closing the bail. (correct)

By fully opening the bail.

By adjusting the pump discharge pressure.

By using a different hose diameter.

What feature of TFD high rise nozzles allows for the extension of a hoseline in a high rise setting?

The ability to provide multiple flow patterns.

The use of lightweight materials.

The internal shut-off mechanism. (correct)

The automatic adjustment of flow rates.

Which of the following statements about Elkhart Brass 'SM' (selectomatic) nozzles is true?

They maintain a constant flow through variable pressure. Signup and view all the answers

What is the expected output of a TFD high rise nozzle when used with a pump discharge pressure between 70 and 80 psi?

140-150 gpm stream. Signup and view all the answers

What is a primary disadvantage of using a 3" line for firefighting?

Its mobility is significantly limited after placement. Signup and view all the answers

How does the flow from a RAM monitor compare to traditional handlines?

It can reach flows up to 500 gpm. Signup and view all the answers

Which application is NOT mentioned as a use for the 2" high rise hose?

Replacing a broken section of 2" hose. Signup and view all the answers

What is a key feature of the SM-30F nozzle when paired with high rise hose?

It allows for flows comparable to a 3" handline. Signup and view all the answers

What is one benefit of deploying a RAM monitor as part of a blitz attack?

It can be operated by a smaller crew than traditional lines. Signup and view all the answers

Why might a fire crew prefer to use a 2" high rise hose instead of a 3" line?

It is more easily maneuverable. Signup and view all the answers

What flow range can a 3" line provide?

210-350 gpm Signup and view all the answers

Which of the following statements about RAM monitors is true?

They can be deployed quickly for immediate effect. Signup and view all the answers

What is the standard minimum flow rate when applying a master stream, excluding a RAM?

1000 gpm Signup and view all the answers

Which of the following devices can be used with both a solid or fog tip?

Portable master stream base (for deck guns) Signup and view all the answers

What are telesquirt apparatus especially suited for applying?

Applying water through a window or door and aiming water at the ceiling Signup and view all the answers

In which situation is it generally advised to apply master streams through roof openings?

When the fire breaks through the roof Signup and view all the answers

What is the main advantage of aiming master streams through windows and doors?

To reach the ceiling more effectively Signup and view all the answers

What is the default mixing ratio for Class A foam concentrate used by TFD apparatus?

0.3% Signup and view all the answers

Which is NOT a characteristic of Class A foam?

Requires flushing Signup and view all the answers

What is the purpose of richening up Class A foam?

For exposure protection and overhaul in dangerous areas Signup and view all the answers

Class B foam primarily relies on what mechanism to mitigate fire hazards?

Forming a vapor-suppressing blanket Signup and view all the answers

What is the correct mixing ratio for the Class B foam concentrate used by TFD for liquid fuels?

3% Signup and view all the answers

Why is Mil-Spec AFFF foam not effective for off-airport fires?

It is specifically designed for aircraft fuels. Signup and view all the answers

How much Class A foam concentrate can be added to a 500-gallon booster tank for overhaul?

0.1 gallons Signup and view all the answers

What foam concentrate % is classified as 'Universal' foam?

Class B foam using 3% concentration Signup and view all the answers

What is the primary way Class A foam extends its effectiveness during firefighting?

It reduces the surface tension of water. Signup and view all the answers

How many gallons of Class A and Class B foam does a TFD engine with onboard foam typically carry?

40 gallons of each. Signup and view all the answers

Which statement is true regarding the production of foam during firefighting?

Foam expands when mixed with air via nozzles. Signup and view all the answers

What is a crucial factor that companies must know regarding their foam apparatus?

The quantities of foam available on their apparatus. Signup and view all the answers

What is a key benefit of using Class A foam in firefighting scenarios?

It allows for faster knockdown and reduces overhaul. Signup and view all the answers

What is the maximum duration firefighters can use a 20-gallon tank with Class B foam at a flow rate of 100 GPM and 0.3% concentration?

1 hour Signup and view all the answers

If an Incident Commander (IC) anticipates needing a significant amount of foam, what is the minimum quantity that should prompt a call for the TFD Foam Trailer?

80 gallons Signup and view all the answers

What is the expected operational time when using a 40-gallon tank with a Hydrofoam nozzle at 350 GPM and 3% foam concentration?

3 - 4 minutes Signup and view all the answers

Who else could the IC call for foam?

Sun refinery Signup and view all the answers

What is the GPM and duration for a handline using a 40-gallon tank with a 3% concentration of Class B foam?

100 GPM for 13 minutes Signup and view all the answers

Study Notes

TFD High Rise Nozzles

TFD high rise nozzles deliver high-flow solid streams from a 1½" preconnect, achieving 140-150 gpm with 200' of hose at 70-80 psi.
A nozzle can produce a medium fog pattern by slightly closing the bail for increased stream turbulence.
Elkhart Brass "SM" automatic fog nozzles maintain 100 psi to ensure consistent flow, offering 150 gpm at a minimum of 75 psi for pressure-reduced applications.

2" High Rise Hose

Bundled and stored in high rise bags on TFD apparatus, the 2" high rise hose is versatile for various firefighting tasks beyond high rise operations.
Can extend a 1½" preconnect, replace broken sections of hose, or create larger flow handlines with manageable weight.

3" Lines and Rapid Access Monitor (RAM)

3" lines provide flows of 210-350 gpm but lack mobility, making them difficult to move once charged.
RAM monitors can connect to 3" preconnects and deliver flows up to 500 gpm, effective for both offensive and defensive applications during large fires.

TFD Master Streams

Master streams require a minimum flow of 1000 gpm and include pre-piped deck guns, portable bases, and ladder pipes.
Application techniques include attacking through roof openings or from windows aiming upward, facilitating effective fire control.
Telesquirt apparatus allows for flexible positioning of master streams targeting ceilings.

Foam Fire Streams

TFD engines carry 40 gallons each of Class A and Class B foam; Telesquirts carry 20 gallons.
Familiarity with foam types and quantities is essential for effective firefighting.

Class A Foam

Class A foams lower water surface tension, expanding to create foam for improved knockdown efficiency and reduced overhaul time.
Electric foam systems default to 0.3% concentrate but can be adjusted for longer supply duration or stronger adhesion for exposure protection.

Class B Foam

Class B AFFF/ATC foams specifically target flammable liquids, forming vapor-suppressing blankets for fire control, mixed at a 3% concentration.
TFD uses "Universal" foam suitable for various liquid fuels.

Airport Apparatus Foam

Mil-Spec AFFF is used on airport apparatus, tailored for aircraft fuels, making it unsuitable for over-the-road fuel fires.

Foam Resource Management

For significant foam needs exceeding 80 gallons, incident command should request the TFD Foam Trailer, equipped with 750 gallons of foam.
Sun Refinery serves as a foam staging area for additional support on large incidents requiring extensive foam application.

Foam Limitations

Awareness of foam system limitations is crucial; early requests for additional foam can prevent resource burnout.
Specific application rates reveal consumption times for both handlines and hydrofoam nozzles, highlighting the need for calculated foam usage.

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Description

Explore the technical specifications and functionality of TFD high rise nozzles as detailed in the Emergency Operating Guidelines. Learn about flow rates, hose specifications, and operational considerations for effective firefighting in high-rise scenarios.