Podcast
Questions and Answers
What is the maximum coverage area of the 904K piercing nozzle?
What is the maximum coverage area of the 904K piercing nozzle?
What material is the tip of the 904K nozzle primarily made from?
What material is the tip of the 904K nozzle primarily made from?
Which of the following is a disadvantage of using the 904K piercing nozzle?
Which of the following is a disadvantage of using the 904K piercing nozzle?
What is the purpose of the built-in shut-off valve in model K of the nozzle?
What is the purpose of the built-in shut-off valve in model K of the nozzle?
Signup and view all the answers
What is the diameter of the shaft of the 904K nozzle?
What is the diameter of the shaft of the 904K nozzle?
Signup and view all the answers
How far must the 904K nozzle be driven into a compaction for full penetration?
How far must the 904K nozzle be driven into a compaction for full penetration?
Signup and view all the answers
During operation, what should be attached to the 904K nozzle along with a short section of hose?
During operation, what should be attached to the 904K nozzle along with a short section of hose?
Signup and view all the answers
What is some of the key advantages of the 904K nozzle?
What is some of the key advantages of the 904K nozzle?
Signup and view all the answers
What kind of connection does the 904K nozzle utilize?
What kind of connection does the 904K nozzle utilize?
Signup and view all the answers
What is the primary method used in an indirect attack to extinguish a fire?
What is the primary method used in an indirect attack to extinguish a fire?
Signup and view all the answers
Which of the following models has the highest flow rate at 50 PSI?
Which of the following models has the highest flow rate at 50 PSI?
Signup and view all the answers
What is a few disadvantage of using the indirect attack method?
What is a few disadvantage of using the indirect attack method?
Signup and view all the answers
What is required to be inspected before placing the nozzle in service?
What is required to be inspected before placing the nozzle in service?
Signup and view all the answers
What is the approximate length of the Elkhart Bresnan Distributor Model?
What is the approximate length of the Elkhart Bresnan Distributor Model?
Signup and view all the answers
In what scenario is the Bresnan Distributor Model particularly useful?
In what scenario is the Bresnan Distributor Model particularly useful?
Signup and view all the answers
What is the key difference in diameter coverage between the two models?
What is the key difference in diameter coverage between the two models?
Signup and view all the answers
What feature distinguishes the Akron Brass Model from the Bresnan model?
What feature distinguishes the Akron Brass Model from the Bresnan model?
Signup and view all the answers
What initial action should be taken when placing a nozzle in service?
What initial action should be taken when placing a nozzle in service?
Signup and view all the answers
What is a disadvantage of using a direct attack method in with a Bresnan distributor
What is a disadvantage of using a direct attack method in with a Bresnan distributor
Signup and view all the answers
Which statement accurately describes a benefit of the indirect attack method?
Which statement accurately describes a benefit of the indirect attack method?
Signup and view all the answers
How does the performance of coarse water droplets compare to solid streams during fire extinguishing?
How does the performance of coarse water droplets compare to solid streams during fire extinguishing?
Signup and view all the answers
What unique feature of the ELKHART BRASS R.A.M. XD contributes to its stability during operation?
What unique feature of the ELKHART BRASS R.A.M. XD contributes to its stability during operation?
Signup and view all the answers
Which of the following specifications allows the ELKHART BRASS R.A.M. XD to be operated safely while carrying it?
Which of the following specifications allows the ELKHART BRASS R.A.M. XD to be operated safely while carrying it?
Signup and view all the answers
What is the maximum angle of travel left and right for the ELKHART BRASS R.A.M. XD?
What is the maximum angle of travel left and right for the ELKHART BRASS R.A.M. XD?
Signup and view all the answers
When manned, what is the lowest angle the ELKHART BRASS R.A.M. XD can be set to?
When manned, what is the lowest angle the ELKHART BRASS R.A.M. XD can be set to?
Signup and view all the answers
What component of the ELKHART BRASS R.A.M. XD aids in ground stability?
What component of the ELKHART BRASS R.A.M. XD aids in ground stability?
Signup and view all the answers
What flow rate is associated with the 1 3/8” deluge tip at an 80 psi nozzle pressure?
What flow rate is associated with the 1 3/8” deluge tip at an 80 psi nozzle pressure?
Signup and view all the answers
How much friction loss per 100 feet is indicated when flowing at 80 psi with a 1 3/8” deluge tip?
How much friction loss per 100 feet is indicated when flowing at 80 psi with a 1 3/8” deluge tip?
Signup and view all the answers
What friction loss can be expected within the RAM when flowing at a rate of 500 GPM?
What friction loss can be expected within the RAM when flowing at a rate of 500 GPM?
Signup and view all the answers
What is the maximum pressure that should not be exceeded during operation?
What is the maximum pressure that should not be exceeded during operation?
Signup and view all the answers
For optimal flow, how long should the hose be in a straight line behind the RAM?
For optimal flow, how long should the hose be in a straight line behind the RAM?
Signup and view all the answers
Study Notes
904K Piercing Nozzle Specifications
- Material: 904K stainless steel (K indicates built-in shut-off valve)
- Connection: 1.5" National standard threaded connection
- Shaft Diameter: 1.25"
- Coverage Area: Up to 2,500 square feet (25' in all directions)
- Back Pressure: Limited due to check mark piping
- Tip: Replaceable hardened steel
- Body Material: 1020 soft alloy steel (iron and 20% carbon)
- Full Penetration Depth: 3.75"
- Safety Features: Removable safety strike handle, replaceable strike plate, built-in shut-off valve.
- Extensions: 24"
- Flow Rate (GPM): 175 GPM at 100 PSI
Other Nozzle Models
-
BRESNAN DISTRIBUTOR ELKHART BRASS MODEL:
- Covers a 36’ diameter area
- 2 ½” female coupling
- Chrome plated finish
- Length—6.25”
- Weight—7.5 lbs.
- Nine outlets ranging in size from .5” to .625”
- 340 GPM at 50 PSI; 495 GPM at 100 PSI
-
AKRON BRASS MODEL:
- Covers a 14’ diameter area
- 2 ½” female coupling
- Length—5.125”
- Weight—4.5 lbs.
- Nine variable angle orifices—three 3/8” and six 13/32”
- 250 GPM at 100 PSI
ELKHART BRASS R.A.M. XD SPECIFICATIONS
- Patent-pending hydraulic stability system that harnesses the reaction force for stabilization.
- Four fold-out aluminum forged legs with carbide-tipped ground spikes (rear spikes angled for grip).
- Locking pin holds valve closed to prevent accidental opening (for carrying on charged hose line).
- Attached safety strap with storage pouch.
- 2 ½” inlet and outlet.
- 20° of travel left and right from center.
- Adjustable angle from 51° to 35° unmanned, and 35° to 14° manned.
- Maximum flow rate: 500 GPM
- Maximum pressure: 150 PSI
- Standard tip: 1 3/8” deluge tip
- Tip flow rate: 505 GPM at 80 psi NP
- Friction loss per 100 feet: 55 lbs
- Optimal hose length: 20 feet
Uses
- Attic fires
- Basement fires
- Box truck/semi-truck fires
- Dumpster fires
- Car fires
- Hidden compartment fires
- Confined space fires
- Warehouses with high rack storage
Operation
- Assemble nozzle with desired extensions
- Attach hose and shut-off valve (omit if model has built-in)
- Position hardened tip on exterior surface
- Drive nozzle into compartment and open shut-off valve
- Inspect for cleanliness and obvious damage before use
- Attach a short section of hose with a 2 ½” shut-off device (ball valve).
- Find a location directly above the fire and cut a hole approximately 12"x12".
- Lower the nozzle down one to two feet below the opening to clear the joist or rafter
Indirect vs. Direct Attack
- Indirect Attack: Extinguish fire by converting water to steam, using heat absorption to cool the environment. This allows the team to follow up with a direct interior attack and place water on the remaining burning material.
- Direct Attack: Apply water directly to the fire, using water, steam, and thermal disruption to extinguish the fire.
Advantages
- Safe suppression of confined space fires
- Allows steam expansion for enhanced fire suppression
- Minimizes structural damage due to a small opening
- Makes the job of the entry team easier
- Coarse water droplets absorb more heat than solid streams
Disadvantages
- May require multiple firefighters for deployment
- Potential for damage to hidden electrical or gas services
- Risk of smoke explosions when introducing fresh air to starved-air confined spaces
- Limited reach
- May conduct electricity; not Class C compatible
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on the specifications and operational uses of the 904K piercing nozzle. This quiz covers material, dimensions, and various applications for fire management in confined spaces. Learn about its features and advantages in firefighting scenarios.
