I-C-03 Reverse Hose Lay 10/12/2023

Questions and Answers

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?

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?

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?

Through horn blasts and visual signals Signup and view all the answers

What is the designated role of the firefighter positioned #3 on a suppression apparatus?

Hydrant Firefighter Signup and view all the answers

What is the main purpose of different hose laying methods such as reverse lays?

To choose the method that best fits the needs of the situation Signup and view all the answers

Which of the following roles is incorrectly matched with a suppression apparatus position?

Hydrant Firefighter - #4 Signup and view all the answers

Which statement regarding the riding positions on a suppression apparatus is true?

The riding positions are strictly designated and must be followed Signup and view all the answers

What is the primary purpose of connecting a section of 5” hose from the hydrant assist valve's discharge to the main pump intake?

To facilitate the transfer of water into the pump intake. Signup and view all the answers

When must 3” hose be used according to the guidelines?

When the supply needs are deemed more than adequate. Signup and view all the answers

What is the minimum residual intake pressure that should be monitored to prevent cavitation?

20 psi Signup and view all the answers

Which tool is NOT included in the minimum equipment inventory for hydrant bags?

Hydrant assist valve Signup and view all the answers

What action should be performed after opening the large diameter discharge valve?

Monitor the pressure to ensure proper hose pressurization. Signup and view all the answers

Which statement accurately describes the sequence of actions when using a reverse lay of 3” hose?

A double female coupling is required at the hydrant. Signup and view all the answers

What should be done first when preparing the system to engage water flow into the pump?

Turn the hydrant assist valve handle clockwise. Signup and view all the answers

Which tool is specifically needed to adapt different thread sizes in hydrant operations?

FEC to 4-½” NST adapter Signup and view all the answers

In which scenario is the traditional reverse lay particularly useful?

When later arriving units are delayed and initial supply is needed Signup and view all the answers

What is one key requirement before starting a reverse hose lay evolution?

The supply hydrant must be checked for operation and water Signup and view all the answers

What action should the Driver/Operator (D/O) not exceed during a reverse hose lay?

Exceeding 10 mph Signup and view all the answers

How should the nozzle firefighter secure the 5” hose during deployment?

By standing on the coupling and holding it tightly Signup and view all the answers

What is the primary purpose of the portable hydrant in this operation?

To connect and regulate water supply to the attack apparatus Signup and view all the answers

What should firefighters do if they encounter hose kinks during deployment?

Adjust the hose to eliminate kinks as they occur Signup and view all the answers

What should the Hydrant Firefighter do if the hose lay exceeds 300 feet?

Ride in the cab to the hydrant at OIC’s discretion Signup and view all the answers

Which procedure should be followed if large quantities of water (greater than 500 gpm) are required during an operation?

Connect the 5” hose to the ball intake valve Signup and view all the answers

What is the correct action for the Hydrant Firefighter after attaching the hydrant assist valve?

Wait for a signal before charging the line Signup and view all the answers

What should be reported if burst hose lengths are observed during the operation?

Immediately report to #1 and consider shutting down the hydrant Signup and view all the answers

What does the split lay involve concerning apparatus placement?

One unit lays hose toward the fire while the second lays from the fire to the water source Signup and view all the answers

During hose deployment, why is it critical to maintain road access for later arriving apparatus?

To ensure uninterrupted flow and access for further assistance Signup and view all the answers

How should the nozzle firefighter process air in the supply line?

Bleed off air by cracking a 2-½” discharge gate away from personnel Signup and view all the answers

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.