Podcast
Questions and Answers
Under what circumstances is a reverse lay of 3” hose deemed appropriate?
Under what circumstances is a reverse lay of 3” hose deemed appropriate?
- When the attack apparatus can only be supplied from a long distance
- When the incident commander prefers the use of smaller diameter hose
- When the flow capabilities of 3” hose meet the incident's supply needs (correct)
- When 5” hose is unavailable at the scene
What is the primary reason for using a hydrant assist valve during a reverse lay of 5” hose?
What is the primary reason for using a hydrant assist valve during a reverse lay of 5” hose?
- To connect multiple hoses for better flow
- To increase the volume of water quickly for master streams
- To allow for a rapid supply of water to the attack apparatus (correct)
- To maintain pressure within the attack apparatus
What conditions warrant boosting hydrant pressure during operations?
What conditions warrant boosting hydrant pressure during operations?
- When the weather conditions are unfavorable
- When master streams are to be deployed or hose lays exceed 300 feet (correct)
- If children are present at the scene
- When multiple attack apparatus are in use
How should personnel communicate the need to open hydrants if radio communication is hindered?
How should personnel communicate the need to open hydrants if radio communication is hindered?
What is the designated role of the firefighter positioned #3 on a suppression apparatus?
What is the designated role of the firefighter positioned #3 on a suppression apparatus?
What is the main purpose of different hose laying methods such as reverse lays?
What is the main purpose of different hose laying methods such as reverse lays?
Which of the following roles is incorrectly matched with a suppression apparatus position?
Which of the following roles is incorrectly matched with a suppression apparatus position?
Which statement regarding the riding positions on a suppression apparatus is true?
Which statement regarding the riding positions on a suppression apparatus is true?
What is the primary purpose of connecting a section of 5” hose from the hydrant assist valve's discharge to the main pump intake?
What is the primary purpose of connecting a section of 5” hose from the hydrant assist valve's discharge to the main pump intake?
When must 3” hose be used according to the guidelines?
When must 3” hose be used according to the guidelines?
What is the minimum residual intake pressure that should be monitored to prevent cavitation?
What is the minimum residual intake pressure that should be monitored to prevent cavitation?
Which tool is NOT included in the minimum equipment inventory for hydrant bags?
Which tool is NOT included in the minimum equipment inventory for hydrant bags?
What action should be performed after opening the large diameter discharge valve?
What action should be performed after opening the large diameter discharge valve?
Which statement accurately describes the sequence of actions when using a reverse lay of 3” hose?
Which statement accurately describes the sequence of actions when using a reverse lay of 3” hose?
What should be done first when preparing the system to engage water flow into the pump?
What should be done first when preparing the system to engage water flow into the pump?
Which tool is specifically needed to adapt different thread sizes in hydrant operations?
Which tool is specifically needed to adapt different thread sizes in hydrant operations?
In which scenario is the traditional reverse lay particularly useful?
In which scenario is the traditional reverse lay particularly useful?
What is one key requirement before starting a reverse hose lay evolution?
What is one key requirement before starting a reverse hose lay evolution?
What action should the Driver/Operator (D/O) not exceed during a reverse hose lay?
What action should the Driver/Operator (D/O) not exceed during a reverse hose lay?
How should the nozzle firefighter secure the 5” hose during deployment?
How should the nozzle firefighter secure the 5” hose during deployment?
What is the primary purpose of the portable hydrant in this operation?
What is the primary purpose of the portable hydrant in this operation?
What should firefighters do if they encounter hose kinks during deployment?
What should firefighters do if they encounter hose kinks during deployment?
What should the Hydrant Firefighter do if the hose lay exceeds 300 feet?
What should the Hydrant Firefighter do if the hose lay exceeds 300 feet?
Which procedure should be followed if large quantities of water (greater than 500 gpm) are required during an operation?
Which procedure should be followed if large quantities of water (greater than 500 gpm) are required during an operation?
What is the correct action for the Hydrant Firefighter after attaching the hydrant assist valve?
What is the correct action for the Hydrant Firefighter after attaching the hydrant assist valve?
What should be reported if burst hose lengths are observed during the operation?
What should be reported if burst hose lengths are observed during the operation?
What does the split lay involve concerning apparatus placement?
What does the split lay involve concerning apparatus placement?
During hose deployment, why is it critical to maintain road access for later arriving apparatus?
During hose deployment, why is it critical to maintain road access for later arriving apparatus?
How should the nozzle firefighter process air in the supply line?
How should the nozzle firefighter process air in the supply line?
Study Notes
Reverse Lay Supply Line Evolutions
- Utilizes 5” hose for reverse lay evolutions unless directed otherwise by the Incident Commander (IC).
- 3” hose may be used if flow capabilities are deemed sufficient by the IC.
- Portable hydrant required at attack apparatus; hydrant assist valve mandatory at the hydrant for 5” supply lines.
- Direct supply from the hydrant to the attack apparatus enhances response time and allows apparatus reassignment if pressure stability is ensured.
- Hydrant pressure should be increased if master streams are deployed or if the hose lay exceeds 300 feet.
- Radio communication preferred for hydrant operation requests; visual signals as a secondary method when necessary.
Personnel Roles in Suppression Apparatus
- #1: Unit Officer-in-Charge (OIC) - oversees and directs operations.
- #2: Driver/Operator (D/O) - positions apparatus appropriately and controls speed.
- #3: Hydrant Firefighter (FF) - manages the portable hydrant and ensures proper deployment.
- #4: Nozzle Firefighter (FF) - follows hose deployment protocol and ensures secure placement.
Hose Lay Methods
- Reverse lay is one of three methods for laying supply lines; the others are forward and split lays.
- Best suited for specific situations without eliminating the use of other methods when appropriate.
- Traditional reverse lay differs from MDFR’s method, often used in challenging access scenarios like narrow alleys.
Conducting a 5” Hose Reverse Lay
- Check the supply hydrant for functionality and adequate water before starting.
- Each firefighter has distinct tasks, ensuring coordination and safety during deployment.
- D/O must maintain a speed of no more than 10 mph during the hose lay.
- Hydrant FF leads the portable hydrant deployment, ensuring clear operation and avoiding hang-ups during the hose lay.
Hydrant Assist and Supply Apparatus Protocol
- Position close to hydrant for shorter hose connections.
- Engage pump and chock wheels for safety.
- Connect hoses properly from hydrant assist valve to both pump intake and discharge.
- Monitor residual intake pressures to avoid cavitation and ensure effective pressure boosting.
3” Reverse Lay Considerations
- Used only with IC approval when flow from 3” is adequate.
- Typically involves hand-laid supply lines from a stationary apparatus.
- Connection procedures are similar to 5” hose, ensuring proper hydrant assist valve use.
Hydrant Bag Minimum Equipment Inventory
- Minimum gear includes: hydrant wrenches, caps, spanner wrenches, rubber mallet, and various adapters for efficient operating capabilities.
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Description
This quiz assesses your understanding of reverse lay supply line evolutions, focusing on the use of 5” and 3” hose as determined by the Incident Commander. It covers protocols for hydrant usage and the importance of flow capabilities during incident support.
