Fire Inspection & Code Enforcement Chapt. 8

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  • 1/49 Questions

    What entity charters a public water system to provide service to a community or area?

    • State or local government
    • Environmental Protection Agency
    • Natural Resources Conservation Service
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Safety Quizzes & Trivia
About This Quiz

Explore key aspects of water supply systems in 'Fire Inspection & Code Enforcement Chapt. 8'. This quiz assesses understanding of water system types, distribution components, and primary water sources, crucial for professionals in environmental science and public safety.

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  • 2. 

    The 2 basic types of water supply distribution systems are public and ______ systems.

    • Private

    • For-profit

    • Military

    Correct Answer
    A. Private
    Explanation
    Private water supply distribution systems refer to systems that are owned and operated by private entities or individuals. These systems are not controlled or regulated by the government or public authorities. In contrast, public water supply distribution systems are owned and operated by the government or public entities and are typically regulated for the benefit of the general public. The answer "private" accurately completes the sentence by providing the opposite term to "public."

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  • 3. 

    Which of the following components of an effective public water supply distribution system involves water pumps?

    • Water supply source

    • Distribution system

    • Means of moving the water

    Correct Answer
    A. Means of moving the water
    Explanation
    The means of moving the water refers to the component of an effective public water supply distribution system that involves water pumps. Water pumps are used to transport water from the water supply source to the distribution system, ensuring that water reaches its intended destination efficiently and effectively.

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  • 4. 

    Which of the following is the primary source of water in North America?

    • Aquifers

    • Groundwater

    • Water from the ocean

    Correct Answer
    A. Groundwater
    Explanation
    Groundwater is the primary source of water in North America because it is found in underground aquifers and provides a significant portion of the region's water supply. Aquifers are underground layers of porous rock or sediment that hold and transmit water, making them a crucial source for groundwater. While water from the ocean can be desalinated and used as a source of freshwater, it is not considered the primary source in North America. Therefore, groundwater is the correct answer.

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  • 5. 

    Which of the following is a source of water that is removed through wells equipped with pumps or from springs?

    • Aquifers

    • Groundwater

    • Water from the ocean

    Correct Answer
    A. Aquifers
    Explanation
    Aquifers are underground layers of permeable rock or sediment that contain water. Wells equipped with pumps or springs can extract water from these aquifers. Groundwater refers to the water that is stored and flows within the aquifers. Water from the ocean is not a source of water that is removed through wells or springs.

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  • 6. 

    A system that delivers water from the source or treatment plant to the distribution system without pumping equipment is known as a _______ system.

    • Gravity

    • Pumpless

    • Combination

    Correct Answer
    A. Gravity
    Explanation
    A system that delivers water from the source or treatment plant to the distribution system without pumping equipment is known as a gravity system. In this type of system, the water flows naturally due to the force of gravity, relying on elevation differences and the slope of the pipelines to move the water from higher to lower areas. This eliminates the need for pumps, making it a cost-effective and energy-efficient method of water distribution.

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  • 7. 

    What forces the water through the distribution system in a system that uses a gravity water tank?

    • Pumps

    • Elevation pressure

    • Reverse water pressure

    Correct Answer
    A. Elevation pressure
    Explanation
    In a system that uses a gravity water tank, the water is forced through the distribution system by elevation pressure. This means that the water flows downwards due to the force of gravity, creating pressure that pushes the water through the pipes and towards the desired outlets. No pumps or reverse water pressure are needed in this type of system, as the natural force of gravity is sufficient to move the water.

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  • 8. 

    What system do most communities use as a means of moving water?

    • Gravity system

    • Pumpless system

    • Combination system

    Correct Answer
    A. Combination system
    Explanation
    Most communities use a combination system as a means of moving water. This is because a combination system allows for both gravity and pump-based methods to be utilized. Gravity systems rely on the natural downward flow of water, while pump systems use mechanical devices to move water against gravity. By combining these two methods, communities can ensure a reliable and efficient water supply, as they can take advantage of gravity when possible and use pumps when necessary.

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  • 9. 

    Which of the following terms describes the interlocking network of water mains that compose of water distribution system?

    • Web

    • Grid

    • Path

    Correct Answer
    A. Grid
    Explanation
    The term "grid" accurately describes the interlocking network of water mains that make up a water distribution system. A grid refers to a network of interconnected lines or pathways that form a pattern. In the context of a water distribution system, the mains are laid out in a grid-like pattern to efficiently distribute water to various locations. This term accurately captures the structure and organization of the water distribution system.

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  • 10. 

    The type of water mains in a distribution system that have relatively widespread spacing and convey large quantities of water to various points in the distribution system are:

    • Distributors

    • Primary feeders

    • Secondary feeders

    Correct Answer
    A. Primary feeders
    Explanation
    Primary feeders are the type of water mains in a distribution system that have relatively widespread spacing and convey large quantities of water to various points in the distribution system. They are responsible for delivering water from the water source or treatment plant to the secondary feeders, which then distribute the water to smaller distributors. Primary feeders play a crucial role in ensuring that sufficient water is supplied to meet the demand of the distribution system.

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  • 11. 

    The type of water mains in a distribution system that are 12 to 14 inches in diameter and can be isolated by control valves are:

    • Distributors

    • Primary feeders

    • Secondary feeders

    Correct Answer
    A. Secondary feeders
    Explanation
    Secondary feeders are the type of water mains in a distribution system that are 12 to 14 inches in diameter and can be isolated by control valves. Distributors and primary feeders are not the correct answers as they do not meet the criteria mentioned in the question.

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  • 12. 

    The type of water mains in a distribution system that serve individual fire hydrants and commercial and residential consumers are:

    • Distributors

    • Primary feeders

    • Secondary feeders

    Correct Answer
    A. Distributors
    Explanation
    Distributors are the type of water mains in a distribution system that serve individual fire hydrants and commercial and residential consumers. These water mains are responsible for delivering water to specific locations, such as hydrants and consumers, ensuring that they have access to water for their needs. Primary feeders, on the other hand, are larger mains that distribute water to multiple distributors, while secondary feeders further distribute water from distributors to smaller service lines. However, in this case, the correct answer is distributors as they directly serve fire hydrants and consumers.

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  • 13. 

    What is the MOST likely size of primary feeders in a water distribution system?

    • 10 to 12 inches

    • 12 to 14 inches

    • 16 to 72 inches

    Correct Answer
    A. 16 to 72 inches
    Explanation
    The most likely size of primary feeders in a water distribution system is 16 to 72 inches. This range of sizes allows for a sufficient flow of water to meet the demands of the distribution system. Larger pipes are typically used for primary feeders to ensure that an adequate volume of water can be delivered to various areas of the system. Smaller pipe sizes may be used for secondary or tertiary feeders, but primary feeders generally require larger pipes to accommodate the higher flow rates.

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  • 14. 

    Which of the following statements about the grid or loop water distribution system is MOST accurate?

    • High demand in one area does not reduce water flow in other areas

    • When pipes or the grid must be repaired, constant pressure is lost

    • High demand in one area automatically reduces water flow in other areas

    Correct Answer
    A. High demand in one area does not reduce water flow in other areas
    Explanation
    The correct answer is "high demand in one area does not reduce water flow in other areas." This means that even if there is a high demand for water in a specific area, the water flow in other areas will not be affected or reduced. This suggests that the grid or loop water distribution system is designed in such a way that it can handle high demand without compromising the water flow in other areas.

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  • 15. 

    Which of the following statements about storage tanks is MOST accurate?

    • The lower the tank, the more elevation head pressure generated.

    • The higher the tank, the more elevation head pressure generated.

    • Elevation head pressure can be increased by using smaller tanks

    Correct Answer
    A. The higher the tank, the more elevation head pressure generated.
    Explanation
    The statement "the higher the tank, the more elevation head pressure generated" is the most accurate because elevation head pressure is directly proportional to the height of the tank. As the tank's height increases, the pressure exerted by the weight of the liquid inside the tank also increases. This increased pressure can be utilized for various purposes such as pumping water to higher levels or providing a steady flow of liquid in a system. Therefore, a higher tank will generate more elevation head pressure compared to a lower tank.

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  • 16. 

    How often should control valves be exercised to ensure they are in good working condition?

    • Once a month

    • Once every six months

    • At least once a year

    Correct Answer
    A. At least once a year
    Explanation
    Control valves should be exercised at least once a year to ensure they are in good working condition. Regular exercising helps to prevent valve sticking, corrosion, and buildup of debris, ensuring that the valves operate smoothly and accurately. It also helps to identify any potential issues or malfunctions early on, allowing for timely maintenance or repairs. By exercising control valves annually, the risk of valve failure or malfunction is minimized, ensuring the efficient and reliable operation of the system they are a part of.

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  • 17. 

    What is the maximum length for valve spacing in high-value districts as recommended by Commercial Risk Services, Inc.?

    • 200 feet

    • 300 feet

    • 500 feet

    Correct Answer
    A. 500 feet
    Explanation
    Commercial Risk Services, Inc. recommends a maximum length of 500 feet for valve spacing in high-value districts. This means that valves should be placed no more than 500 feet apart from each other in these districts. This spacing allows for efficient and effective control of water flow and pressure in case of emergencies or maintenance needs. It ensures that valves are easily accessible and can be operated promptly when required.

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  • 18. 

    The two broad categories of control valves are:

    • Automatic and manual

    • Primary and secondary

    • Indicating and nonindicating

    Correct Answer
    A. Indicating and nonindicating
    Explanation
    The correct answer is indicating and nonindicating. Control valves can be categorized into two broad categories based on their ability to indicate the position of the valve. Indicating control valves have a visual indicator that shows the position of the valve, allowing operators to easily determine whether the valve is open or closed. Nonindicating control valves do not have this visual indicator, making it more difficult for operators to determine the valve position visually.

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  • 19. 

    Valves in public water systems are usually:

    • Automatic

    • Indicating

    • Nonindicating

    Correct Answer
    A. Nonindicating
    Explanation
    Valves in public water systems are typically nonindicating. This means that they do not have any built-in mechanisms or features to indicate their position or status. Nonindicating valves require manual inspection or monitoring to determine whether they are open or closed. This is in contrast to indicating valves, which have visual indicators or other mechanisms to show their position. Automatic valves, on the other hand, are designed to open or close automatically based on certain conditions or signals, but this is not the typical type of valve used in public water systems.

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  • 20. 

    Which of the following types of control valves has a solid plate operated by a handle and screw mechanism and when the valve nut is turned, the gate either rises or lowers to control the water flow?

    • Gate valve

    • Butterfly valve

    • Backflow valve

    Correct Answer
    A. Gate valve
    Explanation
    A gate valve has a solid plate that is operated by a handle and screw mechanism. When the valve nut is turned, the gate either rises or lowers to control the water flow. This type of valve is commonly used in applications where a straight-line flow of fluid and minimum restriction is desired. Gate valves are typically used in pipelines that carry liquids or gases at high pressure and temperature, as they provide a tight seal and excellent shut-off capabilities.

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  • 21. 

    Which of the following types of control valves uses a flat circular plate in a pipe that rotates 90 degrees across the cross section of the pipe to control the flow of water?

    • Gate valve

    • Butterfly valve

    • Backflow valve

    Correct Answer
    A. Butterfly valve
    Explanation
    A butterfly valve is a type of control valve that uses a flat circular plate in a pipe. This plate, known as the disc or the butterfly, is mounted on a rod and rotates 90 degrees across the cross section of the pipe to control the flow of water. When the disc is parallel to the flow, the valve is fully open, and when it is perpendicular to the flow, the valve is fully closed. By adjusting the angle of the disc, the flow rate can be controlled at any desired level.

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  • 22. 

    Which of the following devices determines the quantity of water that the facility is using for billing purposes?

    • Primary water

    • Indicating charger

    • Water flowmeter

    Correct Answer
    A. Water flowmeter
    Explanation
    A water flowmeter is a device used to measure the quantity of water flowing through a pipe or system. In the context of billing purposes, a water flowmeter is essential as it accurately determines the amount of water being consumed by a facility. By measuring the flow rate, it provides the necessary data for billing calculations, ensuring that the facility is charged correctly based on their water usage. Therefore, a water flowmeter is the device that determines the quantity of water used for billing purposes.

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  • 23. 

     Which of the following devices prohibits water that may be contaminated from flowing into the public water system?

    • Indicating charger

    • Water flowmeter

    • Backflow preventer

    Correct Answer
    A. Backflow preventer
    Explanation
    A backflow preventer is a device that prevents the flow of water that may be contaminated from flowing back into the public water system. It is designed to ensure the safety and purity of the water supply by preventing any potential backflow of contaminants. This device is commonly used in plumbing systems to protect against backflow caused by backpressure or back siphonage.

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  • 24. 

    Which of the following types of fire hydrants is designed for use in climates that have freezing temperatures?

    • Wet-barrel

    • Dry-barrel

    • Combination barrel

    Correct Answer
    A. Dry-barrel
    Explanation
    Dry-barrel fire hydrants are designed for use in climates that have freezing temperatures. Unlike wet-barrel hydrants, which have water constantly present in the barrel, dry-barrel hydrants have the water drained from the barrel after each use. This prevents the water from freezing and damaging the hydrant in freezing temperatures. Dry-barrel hydrants are commonly used in areas with cold climates to ensure that the hydrant remains operational even in freezing conditions.

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  • 25. 

    Which of the following types of fire hydrants is designed for use in mild climates where temperatures remain above freezing?

    • Wet-barrel

    • Dry-barrel

    • Combination barrel

    Correct Answer
    A. Wet-barrel
    Explanation
    Wet-barrel fire hydrants are designed for use in mild climates where temperatures remain above freezing. In this type of hydrant, the main valve is located below the frost line and the barrel is constantly filled with water. This prevents the water from freezing and allows for quick and easy access to water in case of a fire. Dry-barrel hydrants, on the other hand, are designed for use in colder climates where freezing is a concern. Combination barrel hydrants have both wet and dry barrel features and can be used in a variety of climates.

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  • 26. 

    How often should hydrant inspections occur?

    • Once a year

    • At least twice a year

    • At least once every three years

    Correct Answer
    A. At least twice a year
    Explanation
    Hydrant inspections should occur at least twice a year to ensure their proper functioning and to identify any potential issues or damages. Regular inspections help in maintaining the hydrants' readiness for emergencies and ensure that they are in good working condition. By conducting inspections at least twice a year, any problems can be detected and addressed promptly, reducing the risk of failure during critical situations. This frequency of inspections allows for regular maintenance and ensures that the hydrants are always prepared to deliver water efficiently when needed.

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  • 27. 

    Hydrant discharge outlets are considered standard if they have at least one large outlet often referred to as the pumper outlet nozzle or ______ connection.

    • Primary

    • Secondary

    • Steamer

    Correct Answer
    A. Steamer
    Explanation
    Hydrant discharge outlets are considered standard if they have at least one large outlet often referred to as the pumper outlet nozzle or steamer connection. The term "steamer" refers to a type of nozzle that is designed to deliver a high volume of water at a high pressure. This type of connection is commonly used for firefighting purposes, allowing firefighters to quickly and effectively extinguish fires. The presence of a steamer connection indicates that the hydrant is equipped to handle the demands of firefighting operations.

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  • 28. 

    The male treads on all hydrant discharge outlets must conform to those used by:

    • Local industries

    • State emergency services

    • Local fire department

    Correct Answer
    A. Local fire department
    Explanation
    The male treads on all hydrant discharge outlets must conform to those used by the local fire department because they are responsible for managing and controlling fire emergencies in the area. By having standardized male treads on hydrant discharge outlets, it ensures compatibility and ease of use for the local fire department when connecting their equipment to the hydrants. This allows for efficient and effective firefighting operations during emergencies.

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  • 29. 

    For standard three-way hydrants, hydrant specifications require a _____ valve opening.

    • 2 1/2 inch

    • 4 inch

    • 5 inch

    Correct Answer
    A. 5 inch
    Explanation
    For standard three-way hydrants, the hydrant specifications require a 5-inch valve opening. This means that the valve inside the hydrant, which controls the flow of water, should have an opening diameter of 5 inches. This size is specified to ensure that an adequate amount of water can flow through the hydrant, allowing for effective firefighting operations.

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  • 30. 

    For connection to the water main, hydrant specifications require a _____ valve opening.

    • 4 inch

    • 5 inch

    • 6 inch

    Correct Answer
    A. 6 inch
    Explanation
    Hydrant specifications require a 6-inch valve opening for connection to the water main. This means that the valve opening of the hydrant should be 6 inches in diameter in order to properly connect it to the water main. This size is likely determined based on the water flow requirements and the size of the pipes used in the water main system. A larger valve opening allows for a higher flow rate and better access to the water supply in case of emergencies.

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  • 31. 

    What color designates hydrants with nonpotable water?

    • Red

    • Green

    • Violet

    Correct Answer
    A. Violet
    Explanation
    Violet is the color that designates hydrants with nonpotable water. In many places, hydrants are color-coded to indicate the type of water they contain. Red hydrants typically indicate potable water, green hydrants are used for public water systems, and violet hydrants are specifically designated for nonpotable water sources. This color-coding system helps ensure that the correct water source is used for different purposes, preventing contamination and ensuring public safety.

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  • 32. 

    Which of the following statements about private water supply distribution systems is MOST accurate?

    • The design is very different from municipal distribution systems

    • They can always be relied upon to provide water necessary for fire protection

    • They maintain separate piping for fire protection and domestic or industrial services

    Correct Answer
    A. They maintain separate piping for fire protection and domestic or industrial services
    Explanation
    Private water supply distribution systems maintain separate piping for fire protection and domestic or industrial services. This means that the water used for fire protection is separate from the water used for domestic or industrial purposes. This separation ensures that there is always a dedicated water supply available for fire protection, regardless of the demand for water in other areas.

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  • 33. 

    Which of the following water sources may be an open lake or pond or an enclosed structure and must be filtered to protect the fire-protection system?

    • Reservoirs

    • Suction tanks

    • Pressure tanks

    Correct Answer
    A. Reservoirs
    Explanation
    Reservoirs may be an open lake or pond or an enclosed structure and must be filtered to protect the fire-protection system. This is because reservoirs can contain debris, sediments, and other contaminants that can clog or damage the fire-protection system. Filtering the water helps to remove these impurities and ensure that the water used for fire protection is clean and free from any potential obstructions.

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  • 34. 

    Which of the following water sources are located at ground level and provide a water supply source for pressure-increasing fire pumps?

    • Reservoirs

    • Suction tanks

    • Pressure tanks

    Correct Answer
    A. Suction tanks
    Explanation
    Suction tanks are water sources located at ground level that provide a water supply source for pressure-increasing fire pumps. They are designed to draw water from a nearby water source, such as a river or lake, and supply it to the fire pump at a higher pressure. This allows the fire pump to deliver water at a greater force, enabling effective firefighting operations. Reservoirs and pressure tanks, on the other hand, are not typically located at ground level and may serve different purposes in a water supply system.

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  • 35. 

    Which of the following water sources are used to stabilize or balance the pressures on both public and private water distribution systems at times of peak demand?

    • Reservoirs

    • Pressure tanks

    • Gravity tanks

    Correct Answer
    A. Gravity tanks
    Explanation
    Gravity tanks are used to stabilize or balance the pressures on both public and private water distribution systems at times of peak demand. Unlike reservoirs, which store large volumes of water, gravity tanks are smaller tanks located at higher elevations. They use the force of gravity to provide water pressure to the distribution system. This helps to ensure a consistent and reliable water supply during periods of high demand. Pressure tanks, on the other hand, are used to regulate and maintain pressure within the system, but they do not directly stabilize or balance the pressures during peak demand.

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  • 36. 

     Who is responsible for exercising the system control valves annually for a private fire-protection system?

    • Inspectors

    • Facility employees

    • Utility company employees

    Correct Answer
    A. Facility employees
    Explanation
    Facility employees are responsible for exercising the system control valves annually for a private fire-protection system. This is because facility employees are typically trained and familiar with the specific fire-protection system installed in the facility. They have the knowledge and expertise to properly operate and maintain the system, including exercising the control valves to ensure they are functioning correctly. Inspectors may conduct periodic inspections to ensure compliance and identify any issues, but the regular maintenance and operation of the system is the responsibility of facility employees. Utility company employees, on the other hand, are typically responsible for maintaining and operating utility infrastructure, such as power or water supply, and not specifically fire-protection systems.

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  • 37. 

    Small structures that contain standpipe connections and large hoselines preconnected to the discharge outlet are known as:

    • Warming huts

    • Hose houses

    • Point sheds

    Correct Answer
    A. Hose houses
    Explanation
    Hose houses are small structures that are equipped with standpipe connections and large hoselines preconnected to the discharge outlet. These houses are specifically designed to store and protect the hoses used for firefighting purposes. They provide quick access to the hoses and ensure that they are ready for immediate use during emergencies. Hose houses are commonly found in fire stations or near fire hydrants, allowing firefighters to efficiently deploy and connect the hoses to fight fires effectively.

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  • 38. 

    Which of the following terms refers to pressure remaining at a given point in a water supply system while water is flowing?

    • Static pressure

    • Water hammer

    • Residual pressure

    Correct Answer
    A. Residual pressure
    Explanation
    Residual pressure refers to the pressure that remains at a specific point in a water supply system while water is flowing. It is the pressure that is still present even when there is water movement within the system. Static pressure, on the other hand, refers to the pressure when there is no water flow, while water hammer refers to the sudden increase in pressure caused by the abrupt stoppage or change in flow direction of water. Therefore, residual pressure is the correct term for pressure that remains during water flow.

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  • 39. 

    Which of the following tests are made to determine the rate of fire flow available for fire suppression at various locations within the distribution system?

    • Fire-flow test

    • Control-valve test

    • Peak-demand test

    Correct Answer
    A. Fire-flow test
    Explanation
    The fire-flow test is conducted to determine the rate of fire flow available for fire suppression at different locations within the distribution system. This test helps in assessing the water supply capacity and pressure required to effectively combat fires in different areas. By measuring the flow rate and pressure, it ensures that an adequate amount of water can be delivered to extinguish fires and protect lives and property. The control-valve test and peak-demand test are not specifically designed for this purpose, making the fire-flow test the correct answer.

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  • 40. 

    How often should fire-flow tests be performed on existing portions of the water distribution system?

    • At least every two years

    • At least every three years

    • At least every five years

    Correct Answer
    A. At least every five years
    Explanation
    Fire-flow tests should be performed on existing portions of the water distribution system at least every five years. This is necessary to ensure that the system is capable of delivering the required amount of water for firefighting purposes. Regular testing helps identify any deficiencies or issues in the system that may hinder its effectiveness during emergencies. By conducting these tests every five years, any potential problems can be addressed and necessary improvements can be made to maintain the system's functionality and reliability.

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  • 41. 

    Fire hydrant inspections are generally performed:

    • Annually

    • Every two years

    • Every three years

    Correct Answer
    A. Annually
    Explanation
    Fire hydrant inspections are generally performed annually to ensure that they are in proper working condition and ready for use in case of a fire emergency. Regular inspections help identify any issues or damage to the hydrants, such as leaks or blockages, which can be promptly repaired. By conducting inspections on an annual basis, fire departments can maintain the functionality and reliability of the hydrants, ensuring the safety of the community they serve.

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  • 42. 

    Which of the following items is NOT an item needed to complete the inspection of fire hydrants?

    • Notebook

    • Gallon, jug or pail

    • Water steam defuser

    Correct Answer
    A. Gallon, jug or pail
    Explanation
    The inspection of fire hydrants requires a notebook to record observations and findings, as well as a water steam defuser to safely release pressure from the hydrant. However, a gallon, jug, or pail is not necessary for the inspection process. It is not mentioned or implied that these items are needed to complete the inspection.

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  • 43. 

    Which of the following is an item that inspectors should observe when making hydrant inspections?

    • Value of surrounding property

    • Date hydrant was placed in service

    • Condition of the paint for rust or corrosion

    Correct Answer
    A. Condition of the paint for rust or corrosion
    Explanation
    Inspectors should observe the condition of the paint for rust or corrosion when making hydrant inspections. This is important because the paint on a hydrant can provide protection against rust and corrosion, which can compromise the functionality and reliability of the hydrant. By checking the condition of the paint, inspectors can identify any areas that may need maintenance or repair to ensure that the hydrant remains in proper working condition.

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  • 44. 

    When inspecting fire hydrants, the inspector should ensure that the clearance between the bottom of the butt and the grade is at least:

    • 8 inches

    • 12 inches

    • 15 inches

    Correct Answer
    A. 15 inches
    Explanation
    The inspector should ensure that the clearance between the bottom of the butt and the grade is at least 15 inches. This is important to ensure that there is enough space for the fire hydrant to be accessed and operated effectively in case of an emergency. A clearance of 15 inches allows for proper clearance and maneuverability for fire department personnel and equipment. It also helps prevent any obstruction or damage to the fire hydrant, ensuring its functionality when needed.

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  • 45. 

    Which of the following is the first step in the using a pitot tube and gauge?

    • Close the petcock and ensure that it is tightened

    • Read the velocity pressure reading from the gauge

    • Open the petcock and ensure the air chamber is drained

    Correct Answer
    A. Open the petcock and ensure the air chamber is drained
    Explanation
    The correct answer is to open the petcock and ensure the air chamber is drained. This is the first step because before using a pitot tube and gauge, it is important to make sure that the air chamber is free from any trapped air. Opening the petcock allows any air in the chamber to be released, ensuring accurate measurements of velocity pressure can be obtained from the gauge. Closing the petcock and tightening it, as well as reading the velocity pressure reading from the gauge, would be subsequent steps in the process.

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  • 46. 

    The easiest way to determine how much water is flowing from a hydrant outlet is to:

    • Make a best guess estimate

    • Use reading from similar fire-flow tests

    • Refer to prepared tables for nozzle/outlet discharge

    Correct Answer
    A. Refer to prepared tables for nozzle/outlet discharge
    Explanation
    The easiest way to determine how much water is flowing from a hydrant outlet is to refer to prepared tables for nozzle/outlet discharge. These tables provide specific information about the discharge rates for different types of nozzles and outlets. By consulting these tables, one can accurately determine the amount of water flowing from the hydrant outlet without the need for guesswork or relying on readings from other fire-flow tests.

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  • 47. 

    In flow formulas, the coefficient of 1.0 is assigned to an ideal frictionless discharge orifice; an actual hydrant orifice or nozzle will have:

    • The same coefficient of discharge

    • A lower coefficient of discharge

    • A higher coefficient of discharge

    Correct Answer
    A. A lower coefficient of discharge
    Explanation
    An actual hydrant orifice or nozzle will have a lower coefficient of discharge compared to an ideal frictionless discharge orifice. This is because real-world factors such as surface roughness, turbulence, and losses due to friction cause a decrease in the discharge coefficient. Therefore, the actual discharge from a hydrant or nozzle will be less efficient than the ideal case.

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  • 48. 

    What is the minimum required residual pressure when computing the available water for area flow-test results?

    • 10 psi

    • 15 psi

    • 20 psi

    Correct Answer
    A. 20 psi
    Explanation
    The minimum required residual pressure when computing the available water for area flow-test results is 20 psi. This means that in order to accurately determine the available water for the area flow-test, there must be a minimum residual pressure of 20 psi.

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  • 49. 

    The implosion of air pockets drawn into fire pumps connected to the system is referred to as:

    • Cavitation

    • Backflow

    • Flow voids

    Correct Answer
    A. Cavitation
    Explanation
    Cavitation refers to the implosion of air pockets drawn into fire pumps connected to the system. When the water pressure in the pump drops below the vapor pressure of the water, it causes the formation of air bubbles. These bubbles then collapse or implode when they reach higher pressure areas, causing damage to the pump and reducing its efficiency. Therefore, cavitation is the correct term to describe this phenomenon.

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Quiz Review Timeline (Updated): Mar 20, 2023 +

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  • Current Version
  • Mar 20, 2023
    Quiz Edited by
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  • Mar 04, 2011
    Quiz Created by
    Tribecca09

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