Podcast
Questions and Answers
Should not rest on the bottom of a swimming pool?
Should not rest on the bottom of a swimming pool?
True (A)
What increases the potential for master stream operations?
What increases the potential for master stream operations?
- High fire load
- Structural collapse (correct)
- Extreme fire conditions
- Increased air consumption
What is a characteristic of smooth bore nozzles?
What is a characteristic of smooth bore nozzles?
- Can provide protection to firefighters with a wide fog pattern
- Feature adjustable discharge patterns
- Operate at high nozzle pressures
- Can be used to apply compressed air foam (correct)
Advancing the __________ pre-connect load involves the firefighter placing the nozzle and the fold of the first tier on his or her shoulder.
Advancing the __________ pre-connect load involves the firefighter placing the nozzle and the fold of the first tier on his or her shoulder.
Which statement about forward lays is true?
Which statement about forward lays is true?
What tool is designed to remove discharge caps from hydrants outlets?
What tool is designed to remove discharge caps from hydrants outlets?
What statement about operating large-diameter attack hose lines is true?
What statement about operating large-diameter attack hose lines is true?
What statement about wet-barrel hydrants is true?
What statement about wet-barrel hydrants is true?
If a second hose line is being added to a standpipe connection, it should be deployed:
If a second hose line is being added to a standpipe connection, it should be deployed:
The internal working parts of a fire hydrant are usually made of:
The internal working parts of a fire hydrant are usually made of:
What describes a constant gallonage fog nozzle?
What describes a constant gallonage fog nozzle?
What is a critical consideration when determining static water sources?
What is a critical consideration when determining static water sources?
At 212 F water expands approximately __________ times its original volume as it turns into steam.
At 212 F water expands approximately __________ times its original volume as it turns into steam.
What is a characteristic of a fog nozzle?
What is a characteristic of a fog nozzle?
Dry-barrel hydrants should be either completely open or completely closed because if they are not:
Dry-barrel hydrants should be either completely open or completely closed because if they are not:
All wye appliances have:
All wye appliances have:
The size of the nozzle opening or orifice determines the quantity of water flowing from the nozzle and the:
The size of the nozzle opening or orifice determines the quantity of water flowing from the nozzle and the:
Which type of stream will expose the maximum water surface for heat absorption?
Which type of stream will expose the maximum water surface for heat absorption?
What type of hose appliance combines multiple hose lines into one?
What type of hose appliance combines multiple hose lines into one?
What factor increases friction loss in fire hose?
What factor increases friction loss in fire hose?
Broken water mains and hydrants located on dead-end water mains are examples of:
Broken water mains and hydrants located on dead-end water mains are examples of:
Which of the following is NOT one of three key components to water shuttle operations?
Which of the following is NOT one of three key components to water shuttle operations?
Who should perform technical maintenance on nozzles?
Who should perform technical maintenance on nozzles?
When reverse-laying a supply hose, connecting a four-way hydrant valve:
When reverse-laying a supply hose, connecting a four-way hydrant valve:
What type of hose stream has the lowest forward velocity? (Select one)
What type of hose stream has the lowest forward velocity? (Select one)
A hose fitting used to connect a smaller-diameter hose line to the end of a larger one is commonly called a(n): (Select one)
A hose fitting used to connect a smaller-diameter hose line to the end of a larger one is commonly called a(n): (Select one)
What statement about dry-barrel hydrants is true? (Select one)
What statement about dry-barrel hydrants is true? (Select one)
When a dry-barrel hydrant is open and there is a broken component in the hydrant barrel, you would see: (Select one)
When a dry-barrel hydrant is open and there is a broken component in the hydrant barrel, you would see: (Select one)
What is a consideration for opening wet-barrel and dry-barrel hydrants? (Select one)
What is a consideration for opening wet-barrel and dry-barrel hydrants? (Select one)
What type of stream is designed for use in attics, cocklofts, basements, and other confined spaces? (Select one)
What type of stream is designed for use in attics, cocklofts, basements, and other confined spaces? (Select one)
What hydrant discharge outlets are considered standard? (Select one)
What hydrant discharge outlets are considered standard? (Select one)
What type of valve is used to control the flow from a hydrant? (Select one)
What type of valve is used to control the flow from a hydrant? (Select one)
Swimming pools, large above-ground animal water tanks, and portable water tanks are considered to be: (Select one)
Swimming pools, large above-ground animal water tanks, and portable water tanks are considered to be: (Select one)
The velocity of a stream of water from a smooth bore nozzle is a result of: (Select one)
The velocity of a stream of water from a smooth bore nozzle is a result of: (Select one)
What type of valve is used on large pump intakes and incorporates a flat baffle that turns 90 degrees? (Select one)
What type of valve is used on large pump intakes and incorporates a flat baffle that turns 90 degrees? (Select one)
What is the primary advantage of a nozzle that uses a slide valve? (Select one)
What is the primary advantage of a nozzle that uses a slide valve? (Select one)
An outside stretch improvised standpipe: (Select one)
An outside stretch improvised standpipe: (Select one)
A hose line should be advanced up a ladder: (Select one)
A hose line should be advanced up a ladder: (Select one)
What is the optimal arrangement at a water shuttle dump site? (Select one)
What is the optimal arrangement at a water shuttle dump site? (Select one)
What is the maximum recommended gallons per minute for a hand line? (Select one)
What is the maximum recommended gallons per minute for a hand line? (Select one)
How can friction loss be overcome or reduced? (Select one)
How can friction loss be overcome or reduced? (Select one)
What flow rate is an automatic master stream fog nozzle typically designed for? (Select one)
What flow rate is an automatic master stream fog nozzle typically designed for? (Select one)
What is the purpose of using chafing blocks when deploying hose? (Select one)
What is the purpose of using chafing blocks when deploying hose? (Select one)
What BEST describes the duty of the backup firefighter when employing the two-firefighter method for small hose line operations? (Select one)
What BEST describes the duty of the backup firefighter when employing the two-firefighter method for small hose line operations? (Select one)
The __________ load and carry is excellent for use on stairways because the hose is not dragged on the ground and is deployed as needed.
The __________ load and carry is excellent for use on stairways because the hose is not dragged on the ground and is deployed as needed.
Because of high friction loss from flowing large amounts of water, it is not practical to supply master stream appliances with anything less than __________ hose line(s).
Because of high friction loss from flowing large amounts of water, it is not practical to supply master stream appliances with anything less than __________ hose line(s).
Water will absorb heat the least efficiently in what form? (Select one)
Water will absorb heat the least efficiently in what form? (Select one)
What is a consideration when placing a master stream device? (Select one)
What is a consideration when placing a master stream device? (Select one)
When the stem nut of a dry-barrel hydrant is turned counterclockwise: (Select one)
When the stem nut of a dry-barrel hydrant is turned counterclockwise: (Select one)
Which type of hose stream can more easily penetrate and saturate burning materials? (Select one)
Which type of hose stream can more easily penetrate and saturate burning materials? (Select one)
In what type of structure would you MOST likely need to create an improvised standpipe? (Select one)
In what type of structure would you MOST likely need to create an improvised standpipe? (Select one)
Automatic fog nozzles maintain a near constant __________ , regardless of the pattern setting. (Select one)
Automatic fog nozzles maintain a near constant __________ , regardless of the pattern setting. (Select one)
Which nozzle is considered to be a broken-stream delivery device? (Select one)
Which nozzle is considered to be a broken-stream delivery device? (Select one)
When making a hydrant connection during a forward lay, what would be the next step after removing enough supply hose to reach the hydrant? (Select one)
When making a hydrant connection during a forward lay, what would be the next step after removing enough supply hose to reach the hydrant? (Select one)
In what type of situation is it NOT acceptable for a single firefighter to operate a small hose line? (Select one)
In what type of situation is it NOT acceptable for a single firefighter to operate a small hose line? (Select one)
Advancing hose lines is easiest when: (Select one)
Advancing hose lines is easiest when: (Select one)
What type of valve incorporates a flat disk hinged on one side which swings open and closed to allow water to flow in only one direction? (Select one)
What type of valve incorporates a flat disk hinged on one side which swings open and closed to allow water to flow in only one direction? (Select one)
Connecting a pumper to a fire hydrant using hard intake hose: (Select one)
Connecting a pumper to a fire hydrant using hard intake hose: (Select one)
Which of the following will make the nozzle easier to handle? (Select one)
Which of the following will make the nozzle easier to handle? (Select one)
In which situation would a four-way hydrant valve likely be used? (Select one)
In which situation would a four-way hydrant valve likely be used? (Select one)
What factor would NOT affect the quality of a hose stream? (Select one)
What factor would NOT affect the quality of a hose stream? (Select one)
If two nozzles have the same PSI and flow rate, the one producing a solid stream will have the longest reach because: (Select one)
If two nozzles have the same PSI and flow rate, the one producing a solid stream will have the longest reach because: (Select one)
When advancing a charged hose line up a stairway: (Select one)
When advancing a charged hose line up a stairway: (Select one)
Which statement about reverse lays is true? (Select one)
Which statement about reverse lays is true? (Select one)
What do standard fire hydrant outlets have that allow fire departments to connect hose to them? (Select one)
What do standard fire hydrant outlets have that allow fire departments to connect hose to them? (Select one)
What type of tool can be used to protect hose from hazards as they go over parapets and window sills? (Select one)
What type of tool can be used to protect hose from hazards as they go over parapets and window sills? (Select one)
Water shuttle operations and relay pumping are two good options for establishing water supply when: (Select one)
Water shuttle operations and relay pumping are two good options for establishing water supply when: (Select one)
How can you verify that a dry-barrel hydrant is draining when shut down? (Select one)
How can you verify that a dry-barrel hydrant is draining when shut down? (Select one)
Water hammer occurs when: (Select one)
Water hammer occurs when: (Select one)
What most directly determines the quantity of water flowing from the nozzle? (Select one)
What most directly determines the quantity of water flowing from the nozzle? (Select one)
When advancing a hose into a structure: (Select one)
When advancing a hose into a structure: (Select one)
Which statement about connecting a pumper to a hydrant with a soft suction hose is correct? (Select one)
Which statement about connecting a pumper to a hydrant with a soft suction hose is correct? (Select one)
Intake strainers attached to the drafting end of a hard-suction hose:
Intake strainers attached to the drafting end of a hard-suction hose:
Flashcards
Wide-Angle Fog Stream
Wide-Angle Fog Stream
A hose stream type known for its wide spread and low forward velocity, making it suitable for cooling large areas and suppressing flames.
Solid Stream
Solid Stream
A hose stream type characterized by its concentrated, powerful jet of water, ideal for penetrating burning materials and quickly extinguishing fires.
Broken Stream
Broken Stream
A hose stream type with a broken or intermittent flow, designed for use in confined spaces like attics and basements, where a continuous stream might cause damage or pose a hazard.
Reducer
Reducer
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Gate Valve
Gate Valve
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Butterfly Valve
Butterfly Valve
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Four-Way Hydrant Valve
Four-Way Hydrant Valve
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Hose Roller
Hose Roller
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Dry-Barrel Hydrant
Dry-Barrel Hydrant
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Wet-Barrel Hydrant
Wet-Barrel Hydrant
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Standard Hydrant Outlets
Standard Hydrant Outlets
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Portable Tanks
Portable Tanks
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Automatic Master Stream Fog Nozzle
Automatic Master Stream Fog Nozzle
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Smooth Bore Nozzle
Smooth Bore Nozzle
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Chafing Blocks
Chafing Blocks
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Backup Firefighter
Backup Firefighter
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MinuteMan Load
MinuteMan Load
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Advance with Uncharged Line
Advance with Uncharged Line
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Master Stream Operations
Master Stream Operations
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Two 2 1/2'' Lines
Two 2 1/2'' Lines
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Verify Drainage
Verify Drainage
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Improvised Standpipe
Improvised Standpipe
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Poor Water Pressure
Poor Water Pressure
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Water Hammer
Water Hammer
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Connecting to Hydrants
Connecting to Hydrants
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Directing Excess Hose
Directing Excess Hose
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Forward Lays
Forward Lays
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Hose Stream Factors
Hose Stream Factors
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Positioning the Hose
Positioning the Hose
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Two-Person Operations
Two-Person Operations
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First Coupling
First Coupling
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Hydrant Wrench
Hydrant Wrench
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Large-Diameter Hose Lines
Large-Diameter Hose Lines
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Horizontal Compression Valve
Horizontal Compression Valve
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Not Freeze-Resistant
Not Freeze-Resistant
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Standpipe Connection
Standpipe Connection
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Fire Hydrant Internal Parts
Fire Hydrant Internal Parts
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Complete Hydrant Operation
Complete Hydrant Operation
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Constant Gallonage Fog Nozzle
Constant Gallonage Fog Nozzle
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Adjustable Discharge Pattern
Adjustable Discharge Pattern
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Water Source Factors
Water Source Factors
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Water Supply Issues
Water Supply Issues
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Wye Appliance
Wye Appliance
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Adapters and Friction Loss
Adapters and Friction Loss
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Shuttle Operation Components
Shuttle Operation Components
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Nozzle Maintenance
Nozzle Maintenance
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Reverse-Laying Supply Hose
Reverse-Laying Supply Hose
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Study Notes
Hose Streams
- Wide-angle fog streams possess the lowest forward velocity.
- Solid streams are ideal for penetrating and saturating burning materials.
- Broken streams are suitable for confined spaces like attics and basements.
- The velocity of water from a smooth bore nozzle is reliant on nozzle pressure.
Hose Fittings and Equipment
- A reducer connects smaller-diameter hoses to larger ones.
- Gate valves control the flow from hydrants, while butterfly valves can be used on large pump intakes.
- Four-way hydrant valves allow for flexible water flow management with longer supply lines.
- Hose rollers protect hoses when navigating over parapets and window sills.
Hydrant Operations
- Dry-barrel hydrant stem nuts are located on top; their proper function is indicated by water bubbling at the base if damaged.
- Wet-barrel and dry-barrel hydrants need careful handling; quick closure can damage adjacent pipes.
- Standard hydrant outlets have male threads for connecting hoses.
- Portable tanks should be level to maximize water capacity during shuttle operations.
Nozzle Types and Flow Rates
- Automatic master stream fog nozzles typically flow between 350-1250 gpm and maintain near constant pressure.
- Smooth bore nozzles can apply compressed air foam and operate at high nozzle pressures.
- Chafing blocks are crucial for protecting hoses from abrasion during deployments.
Firefighter Operations
- During two-person operations with a hose line, the backup firefighter ensures that the line remains straight.
- A minuteman load allows for efficient hose use in stairways without dragging.
- Advances should be made with uncharged lines to facilitate ease of movement through tight spaces.
Master Stream and Drafting Considerations
- Master stream operations raise concerns about structural collapse due to increased water volume.
- Two 2 1/2'' lines are recommended for supplying master streams to mitigate friction loss.
- Verify the drainage of dry-barrel hydrants by feeling for a vacuum at open discharges.
Special Situations
- For creating improvised standpipes, three-story hotels are prime candidates due to elevated access challenges.
- Poor water pressure in distribution systems necessitates shuttle operations or relay pumping.
- Water hammer can occur if moving water abruptly strikes a closed nozzle; this is often characterized by a quick, forceful stop.
Advancing and Connecting Hose Lines
- When connecting to hydrants, wrap the hose line around to ensure stability.
- During advances, excess hose should be directed toward floors above the fire to keep clear pathways.
- Forward lays stretch hose efficiently when the pumper must stay at the water source.
Miscellaneous
- Air friction, gravity, and the condition of the nozzle affect hose stream quality, while water temperature does not.
- The hose line should be positioned to maximize effectiveness and water coverage during operations.
- Operation of small hose lines should not be done alone during interior fire attacks to ensure safety.### Couplings and Hydrant Tools
- First coupling from the hose bed should be female unless using Storz couplings.
- Hydrant wrench specifically designed to remove discharge caps and open fire hydrant valves.
Large-Diameter Attack Hose Lines
- Operating large-diameter attack hose lines typically requires at least two firefighters for effective maneuvering.
Wet-Barrel Hydrants
- Horizontal compression valves are present at each outlet.
- Wet-barrel hydrants are not designed for freezing climates.
Standpipe Connections
- When adding a second hose line to a standpipe, it should be deployed down the lower set of stairs, ensuring clarity and avoiding confusion.
Fire Hydrant Components
- Internal parts of a fire hydrant are generally made of bronze for durability.
- Dry-barrel hydrants require complete opening or closing to prevent soil erosion around the base due to function of the drain hole.
Nozzle Types and Functions
- Constant gallonage fog nozzles maintain a constant pressure through various discharge rates.
- Fog nozzles feature adjustable discharge patterns and maximize water surface exposure for effective heat absorption.
Water Supply Considerations
- Critical factors when determining static water sources include vehicle access to the site.
- Water volume or pressure issues may arise from broken mains and hydrants on dead-end lines.
Hose Equipment and Operations
- Wye appliances consist of one female inlet and multiple male outlets, allowing diverse flow configurations.
- Adding adapters to fire hose increases friction loss.
Water Shuttle Operations
- Essential components for effective water shuttle operations include a dump site at the fire and a fill site at the water source.
Maintenance and Operations
- Qualified technicians should handle technical maintenance of nozzles to ensure proper functionality.
- Reverse-laying supply hose may require a four-way hydrant valve to maintain correct connections for effective water flow.
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