Download Essentials of Fire Fighting 7th Edition - Chapter 13: Hose Operations and Hose Streams 10 and more Exams Safety and Fire Engineering in PDF only on Docsity!
Essentials of Fire Fighting 7th Edition -
Chapter 13: Hose Operations and Hose
Streams 100% Correct
What type of hose stream has the lowest forward velocity? A. Solid stream B. Straight stream C. Wide-angle fog stream D. Narrow-angle fog stream - ANSWER C. Wide-angle fog stream Chapter 13 - page 624 A hose fitting used to connect a smaller-diameter hose line to the end of a larger one is commonly called a(n): A. Wye B. Adapter C. Reducer D. Water thief - ANSWER C. Reducer Chapter 13 - page 601 What statement about dry-barrel hydrants is true? A. Horizontal compression valves are usually at each outlet B. They can only be used with pumpers that have drafting capabilities C. The stem nut used to open and close the control valve is on top of the hydrant D. They are all designed for use in climates that do not experience freezing temperatures - ANSWER C. The stem nut used to open and close the control valve is on top of the hydrant Chapter 13 - page 588 When a dry-barrel hydrant is open and there is a broken component in the hydrant barrel, you would see: A. Water discharging only from the largest outlet B. Water bubbling up out of the ground at the base C. Streams of water shooting from the steamer connection D. A sucking effect that can be heard from the discharge outlets - ANSWER B. Water bubbling up out of the ground at the base
Chapter 13 - page 589 What is a consideration for opening wet-barrel and dry-barrel hydrants? A. The barrels of all hydrants should be drained sufficiently when not in use B. All hydrants should be opened slowly, but can be closed quickly if necessary C. Closing a hydrants too quickly can damage piping and appliances of adjacent residences D. As the main valve moves up, a drain valve is opened to allow water to drain from the barrel - ANSWER C. Closing a hydrants too quickly can damage piping and appliances of adjacent residences Chapter 13 - page 592 What type of stream is designed for use in attics, cocklofts, basements, and other confined spaces? A. Fog B. Solid C. Broken D. Straight - ANSWER C. Broken Chapter 13 - page 624 What hydrant discharge outlets are considered standard? A. At least three hose outlets of any size B. At least two hose outlets for 2 1/2'' couplings C. At least two large outlets often referred to as steamer connections D. At least one large outlet (4'' or 4 1/2'') and two hose outlets for 2 1/2'' couplings - ANSWER D. At least one large outlet (4'' or 4 1/2'') and two hose outlets for 2 1/2'' couplings Chapter 13 - page 588 What type of valve is used to control the flow from a hydrant? A. Ball valve B. Gate valve C. Clapper valve D. Butterfly valve - ANSWER B. Gate valve Chapter 13 - page 600
D. Should be constructed by first dropping the female end over the hand rail and down the centre of the stairwell - ANSWER A. Can be used for lower floors of high-rise buildings Chapter 13 - page 611 A hose line should be advanced up a ladder: A. Uncharged unless it is absolutely necessary to charge it ahead of time B. With extra firefighters on each section of the ladder if the line is charged C. And then tied to anchor points on the ladder, at least one for every section of ladder D. Before attempting other options such as connecting to standpipes or advancing up stairways - ANSWER A. Uncharged unless it is absolutely necessary to charge it ahead of time Chapter 13 - page 612 What is the optimal arrangement at a water shuttle dump site? A. Portable tanks should be set up so only one apparatus can offload at one time B. Portable tanks should be as level as possible to ensure maximum capacity C. When multiple portable tanks are required, they should be at least an apparatus distance away from one another D. When using multiple portable tanks, a jet siphon should be attached to a soft sleeve hose placed between the two tanks - ANSWER B. Portable tanks should be as level as possible to ensure maximum capacity Chapter 13 - page 597 What is the maximum recommended gallons per minute for a hand line? A. 40 gpm B. 100 gpm C. 350 gpm D. 500 gpm - ANSWER C. 350 gpm Chapter 13 - page 620 How can friction loss be overcome or reduced? A. Adding parallel hose lines B. Decreasing hose diameter C. Creating a longer hose lay D. Decreasing pump pressure - ANSWER A. Adding parallel hose lines Chapter 13 - page 628
What flow rate is an automatic master stream fog nozzle typically designed for? A. 10-125 gpm B. 70-200 gpm C. 350-1250 gpm D. 1250-2000 gpm - ANSWER C. 350-1250 gpm Chapter 13 - page 617 What is the purpose of using chafing blocks when deploying hose? A. Keep hose out of contaminated run-off B. Protects hose from abrasions caused by vibrations C. Contains hoses so that they do not become entangled D. Provides protection against vehicles driving over hsoe - ANSWER B. Protects hose from abrasions caused by vibrations Chapter 13 - page 599 What BEST describes the duty of the backup firefighter when employing the two- firefighter method for small hose line operations? A. Operating the bale B. Connecting extra lengths of hose C. Directing the stream in the appropriate direction D. Keeping the hose straight behind the nozzle operator - ANSWER D. Keeping the hose straight behind the nozzle operator Chapter 13 - page 625 The __________ load and carry is excellent for use on stairways because the hose is not dragged on the ground and is deployed as needed. A. Flat B. Skid C. Triple-layer D. Minuteman - ANSWER D. Minuteman Chapter 13 - page 608 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). A. One 4'' B. One 5''
A. A large residence in a new house addition B. A three-story hotel build during the early 20th century C. A big box store with inoperable fire department connections D. A single story auditorium constructed with bow-string trusses - ANSWER B. A three- story hotel build during the early 20th century Chapter 13 - page 610 Automatic fog nozzles maintain a near constant __________ , regardless of the pattern setting. A. Shape B. Volume C. Pressure D. Gallonage - ANSWER C. Pressure Chapter 13 - page 616 Which nozzle is considered to be a broken-stream delivery device? A. Piercing nozzle B. Smooth bore nozzle C. Automatic master stream fog nozzle D. Constant/select gallonage fog nozzle - ANSWER A. Piercing nozzle Chapter 13 - page 618 When making a hydrant connection during a forward lay, what would be the next step after removing enough supply hose to reach the hydrant? A. Slowly open the stem valve B. Wrap the hose line around the hydrant C. Signal to the driver that it is safe to proceed to the fire D. Remove the discharge cap and attach the hose line to the hydrant - ANSWER B. Wrap the hose line around the hydrant Chapter 13 - page 603 In what type of situation is it NOT acceptable for a single firefighter to operate a small hose line? A. Interior fire attack B. Rubbish or trash fire C. Small ground cove fire D. Rekindle during overhaul operations - ANSWER A. Interior fire attack
Chapter 13 - page 625 Advancing hose lines is easiest when: A. Moving down stairways B. The line is already charged C. Carrying the hose over flat surfaces D. Deploying hose from standpipes in stairwells - ANSWER C. Carrying the hose over flat surfaces Chapter 13 - page 607 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? A. Ball valve B. Gate valve C. Clapper valve D. Butterfly valve - ANSWER C. Clapper valve Chapter 13 - page 600 Connecting a pumper to a fire hydrant using hard intake hose: A. Is rarely done because it moves water inefficiently B. Involves the same steps and actions as drafting from a static water source C. Can be considerably more difficult because it requires careful positioning of the pumper D. Is often the best choice because it can be done far more efficiently than making connections with soft intake hose - ANSWER C. Can be considerable more difficult because it requires careful positioning of the pumper Chapter 13 - page 594 Which of the following will make the nozzle easier to handle? A. Shorter hose B. A wide fog pattern C. Larger diameter hose D. A smooth bore nozzle - ANSWER B. A wide fog pattern Chapter 13 - page 627 In which situation would a four-way hydrant valve likely be used?
B. Hose beds set up for reverse lays should be loaded so that the first coupling to come off the hose bed is female C. When a pumper goes to the fire after laying a supply line, a reverse lay should be deployed from the water source to the incident scene D. The primary advantage is that a pumper can remain at the incident scene so hose, equipment, and tools are readily available if needed - ANSWER A. The reverse lay most directly supplements hydrant pressure and establishes drafting operations Chapter 13 - page 605 What do standard fire hydrant outlets have that allow fire departments to connect hose to them? A. Male threads B. Female threads C. Storz couplings D. A mall and female threaded wye - ANSWER A. Male threads Chapter 13 - page 588 What type of tool can be used to protect hose from hazards as they go over parapets and window sills? A. Hose rollers B. Hose bridge C. Chafing block D. Hose rope/chain - ANSWER A. Hose rollers Chapter 13 - page 598 Water shuttle operations and relay pumping are two good options for establishing water supply when: A. Available personnel are limited B. Static water sources are rare or nonexistent C. Water distribution systems have inadequate volume and pressure D. Maneuverability on the fire ground is limited due to narrow roads or tight corners - ANSWER C. Water distribution systems have inadequate volume and pressure Chapter 13 - page 594 How can you verify that a dry-barrel hydrant is draining when shut down? A. A pool of water will form at the base of the hydrant B. A gurgling sound will emit from one of the discharges C. A hissing sound will stop once the main valve has been closed fully
D. A slight vacuum should be felt pulling your palm toward a single open discharge - ANSWER D. A slight vacuum should be felt pulling your palm toward a single open discharge Chapter 13 - page 593 Water hammer occurs when: A. Moving water reaches a closed nozzle and stops with great force B. A pumper creates excessive pressure that pushes against a closed hose line C. A nozzle is opened suddenly and water quickly rushes through appliances and pipes D. Pump pressure is much greater than nozzle pressure, resulting in mechanical damage to hose, piping, and appliances - ANSWER A. Moving water reaches a closed nozzle and stops with great force Chapter 13 - page 628 What most directly determines the quantity of water flowing from the nozzle? A. Hose size B. Pump pressure C. Nozzle pressure D. Size of hydrant connection - ANSWER C. Nozzle pressure Chapter 13 - page 613 When advancing a hose into a structure: A. An uncharged attack hose line should first be advanced to the designated point of entry B. Two firefighters must remain at the entry point to guide the hose line into the structure C. The nozzle operator and the other team member should position on opposite sides of the hose line D. The hose should not be charged until needed because of the difficulty in dragging it through doorways and around corners - ANSWER A. An uncharged attack hose line should first be advanced to the designated point of entry Chapter 13 - page 608 Which statement about connecting a pumper to a hydrant with a soft suction hose is correct? A. If the hydrant does not have a 4 1/2'' or larger connection, soft suction hose cannot be used
C. Triple-layer D. Minuteman - ANSWER C. Triple-layer Chapter 13 - page 606 Which statement about forward lays is true? A. They are the quickest way to lay hose if the apparatus must stay at the water source B. The primary disadvantage is that the supply line must be removed by hand as the apparatus moves forward C. The first coupling to come off the hose bed should be female unless two-way couplings (Storz) are used D. After the connection is made, the firefighter should open the stem valve, and then communicate that water is on the way to the pumper - ANSWER C. The first coupling to come off the hose bed should be female unless two-way couplings (Storz) are used Chapter 13 - page 601 What tool is designed to remove discharge caps from hydrants outlets and open fire hydrant valves? A. Box wrench B. Stem wrench C. Spanner wrench D. Hydrant wrench - ANSWER D. Hydrant wrench Chapter 13 - page 590 What statement about operating large-diameter attack hose lines is true? A. Operating large attack lines always requires at least two firefighters B. The two-firefighter method allows for better maneuvering of the nozzle C. Even with hose straps or rope hose tools, operating a large attack hose line should not be done standing up D. Hose straps or rope hose tools should be used to carry the hose line but not to absorb some of the nozzle reaction - ANSWER B. The two-firefighter method allows for better maneuvering of the nozzle Chapter 13 - page 626 What statement about wet-barrel hydrants is true? A. Turning the stem clockwise opens the valve B. Horizontal compression valves are usually at each outlet C. They are designed for use in climates with freezing temperatures
D. The main control valve is located at the base or foot of the hydrant below the frost line - ANSWER B. Horizontal compression valves are usually at each outlet Chapter 13 - page 588 If a second hose line is being added to a standpipe connection, it should be deployed: A. Onto a different floor to avoid confusion B. Directly from the floor with the standpipe connection C. Along the outside edge of the hose line already deployed above the fire floor D. Down the lower set of stairs, away from the one already deployed up the stairway - ANSWER D. Down the lower set of stairs, away from the one already deployed up the stairway Chapter 13 - page 609- The internal working parts of a fire hydrant are usually made of: A. Bronze B. Cast iron C. Aluminum D. Tungsten carbide - ANSWER A. Bronze Chapter 13 - page 588 What describes a constant gallonage fog nozzle? A. Adjustable-pattern fog nozzle in which the pressure remains constant through a range of discharge rates B. Single-pattern fog nozzle in which the rated discharge is delivered at a designated nozzle pressure and nozzle setting C. Constant discharge rate fog nozzle with a feature that allows manual adjustment to allow a predetermined discharge rate while the nozzle is flowing D. Adjustable-pattern fog nozzle that discharges at a constant rate throughout the range of patterns at a designed nozzle pressure - ANSWER D. Adjustable-pattern fog nozzle that discharges at a constant rate throughout the range of patterns at a designed nozzle pressure Chapter 13 - page 617 What is a critical consideration when determining static water sources? A. Vehicle access to the site B. Availability of soft suction hose C. Access to dry hydrant connections at the water source
The size of the nozzle opening or orifice determines the quantity of water flowing from the nozzle and the: A. Shape of the hose stream B. Distance of reach of the stream C. Pressure produced by the apparatus D. Length of hose required to flow the water - ANSWER B. Distance of reach of the stream Chapter 13 - page 613 Which type of stream will expose the maximum water surface for heat absorption? A. Fog B. Solid C. Broken D. Straight - ANSWER A. Fog Chapter 13 - page 623 What type of hose appliance combines multiple hose lines into one? A. Wye B. Siamese C. Water thief D. Large-diameter hose manifold - ANSWER B. Siamese Chapter 13 - page 601 What factor increases friction loss in fire hose? A. Adding adapters B. Increasing hose size C. Increasing pump pressure D. Smooth linings in fire hose - ANSWER A. Adding adapters Chapter 13 - page 628 Broken water mains and hydrants located on dead-end water mains are examples of: A. Failures or reduction in water volume or pressure from hydrants B. Possible problems firefighters may face when drafting from a static water source C. Symptoms of placing a greater demand on the water supply system than it can provide
D. Why fire hydrants are not the most dependable water supply for fire fighting operations - ANSWER A. Failure or reduction in water volume or pressure from hydrants Chapter 13 - page 587 Which of the following is NOT one of three key components to water shuttle operations A. Dump site at the fire B. Fill site at the water source C. Additional apparatus to draft water to attack pumper D. Mobile water supply apparatus to haul water from fill site - ANSWER C. Additional apparatus to draft water to attack pumper Chapter 13 - page 595 Who should perform technical maintenance on nozzles? A. Driver/operators B. Company officers C. Qualified technicians D. Personnel who perform annual inspections - ANSWER C. Qualified technicians Chapter 13 - page 618 When reverse-laying a supply hose, connecting a four-way hydrant valve: A. Is required because hose loads set up for reverse lays will have male and female connections reversed B. Does not provide a means of switching from pump pressure to hydrants pressure without interrupting the flow C. Provides no additional benefits and demands time and manpower that is best used for fire suppression operations D. Can be done if the pumper may have to disconnect from the supply hose later and leave the hose connected to the hydrant - ANSWER Can be done if the pumper may have to disconnect from the supply hose later and leave the hose connected to the hydrant Chapter 13 - page 605
