Master Plumber Pre-board Exam Practice Test
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The following are components of a basic plumbing system EXCEPT _________.
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Fixtures
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Valves
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Utility box
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Fittings
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About This Quiz
Are you preparing for the Master Plumber Pre-board Exam and looking for a way to test your knowledge and skills? Our Master Plumber Pre-board Exam Practice Test is designed to help you get exam-ready by covering essential topics such as plumbing codes, pipe sizing, water supply systems, drainage systems, and more.
This quiz offers a wide range of multiple-choice See morequestions that mimic the format and difficulty level of the actual pre-board exam. Each question is crafted by experts to challenge your understanding and provide a comprehensive review of the necessary concepts. Detailed explanations for each answer will help you learn from your mistakes and improve your grasp of key principles. This practice test is invaluable to help you succeed and become a certified Master Plumber.
Quiz Preview
- 2.
A source of water which can be made by excavating, digging, boring or drilling into ground for the purpose of obtaining water. Water obtained from this source is accumulated in acquifers resulting from percolation and absorption through ground.
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Well
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River, streams or lake
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Precipitate
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Surface run-off
Correct Answer
A. WellExplanation
A well is a source of water that is created by digging, boring, or drilling into the ground in order to access water. The water obtained from a well comes from underground aquifers, which are formed by water percolating and being absorbed through the ground.Rate this question:
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- 3.
A kind of faucet with external threads provided at its outlet to which a hose may be attached.
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Hose bibb
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Ball valve
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Compression faucet
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Self closing faucet
Correct Answer
A. Hose bibbExplanation
A hose bibb is a type of faucet that has external threads at its outlet, allowing a hose to be easily attached. It is commonly used for outdoor water supply, such as watering gardens or washing cars. The term "hose bibb" is often used interchangeably with "outdoor faucet" or "spigot." This type of faucet provides a convenient and secure connection for hoses, making it easier to access water for various outdoor activities.Rate this question:
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- 4.
Which of the plumbing fixtures is also considered a sanitary ware?
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Water closet
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Lavatory
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Urinal
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All of the above
Correct Answer
A. All of the aboveExplanation
All of the plumbing fixtures mentioned (water closet, lavatory, and urinal) are considered sanitary ware. Sanitary ware refers to any fixture or appliance used for personal hygiene and sanitation purposes. These fixtures are designed to facilitate the disposal of waste and maintain cleanliness in bathrooms or washrooms. Therefore, all of the options provided are correct as they fall under the category of sanitary ware.Rate this question:
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- 5.
Gutters, downspouts, leaders, catch basins, junction boxes, area drains, etc. are components of what system in plumbing?
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Sanitary drainage system
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Water supply system
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Storm drainage system
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Ventilation system
Correct Answer
A. Storm drainage systemExplanation
The components listed, such as gutters, downspouts, catch basins, etc., are all associated with the management of rainwater and runoff. This indicates that they are part of the storm drainage system, which is designed to collect and divert excess water from rainfall or storms. The sanitary drainage system deals with the removal of wastewater and sewage, while the water supply system provides clean water for consumption. The ventilation system, on the other hand, is responsible for maintaining air circulation within a building.Rate this question:
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- 6.
A kind of faucet having one end that extends downwards about three inches long. This type of faucet is used in kitchen sinks and drinking fountains.
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Self- closing faucet
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Compression faucet
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Center set faucet
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Gooseneck
Correct Answer
A. GooseneckExplanation
A gooseneck faucet is a type of faucet commonly used in kitchen sinks and drinking fountains. It has a long, downward-extending spout, resembling the neck of a goose. The design of the gooseneck faucet allows for easy filling of large pots and containers, as well as providing a higher clearance for washing dishes. The term "gooseneck" accurately describes the physical characteristics of this type of faucet.Rate this question:
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- 7.
Which of the following is a violation or contradictory to the basic plumbing principles?
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Plumbing system shall be maintained in a sanitary and serviceable condition
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Water closet may be located in an unlit or unventilated room
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Plumbing fixtures shall be designed and adjusted to use minimum amount of water for flushing
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All premises intended for human habitation shall be provided with ample and wholesome amount of water
Correct Answer
A. Water closet may be located in an unlit or unventilated roomExplanation
The presence of a water closet (toilet) in an unlit or unventilated room contradicts the basic plumbing principles. Plumbing systems should be maintained in a sanitary and serviceable condition, which includes proper lighting and ventilation to ensure a healthy and safe environment. Without adequate lighting and ventilation, the room may become unsanitary and unpleasant to use. Therefore, locating a water closet in such conditions violates the basic principles of plumbing.Rate this question:
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- 8.
Where do you install a flushometer valve?
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Urinal
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Bathtub
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Lavatory
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Bidet
Correct Answer
A. UrinalExplanation
A flushometer valve is typically installed in a urinal.Rate this question:
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- 9.
A fitting or device designed and constructed to provide, when properly vented a liquid seal which prevents backflow and passage of foul air and gases without materially affecting the flow of sewage or wastewater through it.
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Trap
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Fitting
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Pipe
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Valve
Correct Answer
A. TrapExplanation
A trap is a fitting or device that is specifically designed to create a liquid seal, preventing the backflow and passage of foul air and gases. It is important for maintaining proper ventilation in sewage or wastewater systems. Despite its function, the trap does not significantly impede the flow of sewage or wastewater through the system.Rate this question:
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- 10.
What is the prescribed shape of water closet bowl for installation in public places such as commercial centers, offices, airports, etc. ?
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Round
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Elongated
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Square
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Trapezoidal
Correct Answer
A. ElongatedExplanation
The prescribed shape of water closet bowl for installation in public places such as commercial centers, offices, airports, etc. is elongated. This shape is preferred because it offers more comfort and space compared to a round bowl. It provides additional legroom and a larger seating area, making it suitable for longer periods of use. The elongated shape also promotes better hygiene and cleanliness due to its design, making it a practical choice for high-traffic public areas.Rate this question:
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- 11.
Wastewater which comes from discharge of laundry trays, lavatories, bathtubs, etc.
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Black water
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Grey water
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Contaminated water
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Hard water
Correct Answer
A. Grey waterExplanation
Grey water refers to wastewater that is generated from activities such as laundry, bathing, and washing dishes, but does not include sewage from toilets. Unlike black water, which contains human waste and is highly contaminated, grey water is relatively clean and can be reused for purposes like irrigation or flushing toilets. Contaminated water refers to any water source that has been polluted or contains harmful substances, while hard water refers to water that contains high levels of minerals like calcium and magnesium. Therefore, grey water is the correct answer as it specifically describes non-sewage wastewater from household activities.Rate this question:
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- 12.
A watertight compartment into which the discharge of sanitary plumbing system or part thereof, designed and constructed to retain solids, digest organic matter through period of detention and to allow the liquid to discharge into the soil outside of the tank through a system of open-jointed sub-surface piping or seepage pit.
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Seepage pit
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Cesspool
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Septic tank
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Privy vault
Correct Answer
A. Septic tankExplanation
A septic tank is a watertight compartment that is specifically designed to receive and treat the discharge from a sanitary plumbing system. It is constructed to retain solids, allowing them to be digested by bacteria over time. The organic matter is broken down through a process of detention, while the liquid portion is discharged into the soil outside of the tank through a system of open-jointed sub-surface piping or a seepage pit. This ensures that the waste is properly treated and disposed of, making the septic tank an effective solution for managing sewage.Rate this question:
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- 13.
A kind of valve used to prevent or to relieve dangerously high pressures in plumbing; usually used in water supply system. It has a control disk that is held in place by an adjustable connection in the spring, when the pressure becomes too high the disk is forced off its seat and the pressure in the tank or pipe is relieved.
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Balance valve
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Pressure relief valve
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Plug valve
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Temperature and pressure relief valve
Correct Answer
A. Pressure relief valveExplanation
A pressure relief valve is a type of valve used in plumbing systems to prevent or relieve dangerously high pressures. It consists of a control disk that is held in place by an adjustable connection and a spring. When the pressure in the tank or pipe becomes too high, the disk is forced off its seat, allowing the excess pressure to be relieved. This helps to maintain the balance and prevent any potential damage or accidents caused by excessive pressure.Rate this question:
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- 14.
Which of the following water closet designs is prohibited by code due to its insanitary features?
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Hopper
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Plunger
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Pan
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All of these
Correct Answer
A. All of theseExplanation
All of the water closet designs mentioned in the options (hopper, plunger, and pan) are prohibited by code due to their insanitary features. This implies that all of these designs have characteristics that make them unsuitable for use and potentially unhygienic.Rate this question:
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- 15.
Which of the following fixture traps is classified as permissible trap?
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Full S trap
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P-trap
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Bell trap
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Mechanically Sealed Trap
Correct Answer
A. P-trapExplanation
The P-trap is classified as a permissible trap because it effectively prevents sewer gases from entering the building while still allowing water to flow freely. It is shaped like a "P" and is commonly used in plumbing systems to create a water seal that prevents odors and gases from escaping through the drain. The P-trap is considered a standard and widely accepted trap design in plumbing installations.Rate this question:
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- 16.
A water supply pipe that extends vertically one full storey or more to convey water to fixture branches or group of fixtures.
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Up-pipe
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Riser
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Stack pipe
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Water stack
Correct Answer
A. RiserExplanation
A riser is a water supply pipe that runs vertically from one floor to another, or even multiple floors, to provide water to various fixtures or groups of fixtures. It is called a riser because it rises up through the building, allowing water to be transported efficiently to higher levels.Rate this question:
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- 17.
The installation of parts of the plumbing system which can be completed prior to installation of fixtures or finishing. This includes drainage, water supply and vent piping and other necessary pipe supports.
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Roughing-in
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Mock-up installation
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Pre-installation
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Setting
Correct Answer
A. Roughing-inExplanation
Roughing-in refers to the installation of essential components of the plumbing system, such as drainage, water supply, vent piping, and pipe supports, before the fixtures or finishing are installed. This allows for the necessary infrastructure to be put in place in advance, ensuring a smoother and more efficient installation process later on.Rate this question:
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- 18.
A valve in which the flow of liquid is controlled by a rotating drilled ball that fits tightly against a resilient (flexible) seat in the valve body.
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Angle valve
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Check valve
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Float valve
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Ball valve
Correct Answer
A. Ball valveExplanation
A ball valve is a type of valve that controls the flow of liquid by using a rotating drilled ball. The ball fits tightly against a flexible seat in the valve body, creating a seal and preventing any leakage. This design allows for precise control over the flow of liquid and ensures a reliable shut-off when needed.Rate this question:
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- 19.
A portion of the sanitary drainage system installation designed to provide and maintain balance atmospheric pressure within the system thereby preventing trap seal loss, back pressure, siphonage, backflow, retardation of flow and ultimately material deterioration.
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Soil piping system
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Ventilation system
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Storm drainage system
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Sewage disposal system
Correct Answer
A. Ventilation systemExplanation
The ventilation system is a portion of the sanitary drainage system installation that is designed to maintain balance atmospheric pressure within the system. This prevents various issues such as trap seal loss, back pressure, siphonage, backflow, retardation of flow, and material deterioration. The ventilation system ensures that the system functions effectively and efficiently by allowing for the proper flow of air and preventing any negative pressure build-up.Rate this question:
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- 20.
What kind of internally threaded galvanized fitting is used to close the end of an externally threaded pipe?
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Cap
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Plug
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Bushing
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Flange
Correct Answer
A. CapExplanation
A cap is the correct answer because it is a type of internally threaded galvanized fitting specifically designed to close the end of an externally threaded pipe. It is used to seal off the pipe, preventing any leakage or entry of foreign substances. The cap is screwed onto the external threads of the pipe, providing a secure and tight closure.Rate this question:
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- 21.
What kind of internally threaded galvanized fitting is used to close the end of an externally threaded pipe?
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Cap
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Plug
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Bushing
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Flange
Correct Answer
A. CapExplanation
A cap is a type of internally threaded galvanized fitting that is used to close the end of an externally threaded pipe. It is designed to fit over the end of the pipe and has internal threads that match the external threads of the pipe. This allows the cap to be screwed onto the pipe, effectively sealing the end and preventing any leakage or entry of unwanted substances. Caps are commonly used in plumbing and piping systems to close off unused or terminated pipes.Rate this question:
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- 22.
In a building, it consists of water service pipe, building supply pipes and the essential branch pipes, valves and all other appurtenances for the supply of water.
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Water and waste service system
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Water pipeline system
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Water supply and distribution system
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Building water service and sewage piping system
Correct Answer
A. Water supply and distribution systemExplanation
The correct answer is "water supply and distribution system." This term accurately describes the components mentioned in the question, including the water service pipe, building supply pipes, branch pipes, valves, and other necessary elements for supplying water in a building. It encompasses the entire system responsible for delivering water to different parts of the building efficiently and safely.Rate this question:
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- 23.
Which of the following fixtures has a built-in trap?
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Lavatory
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Floor drain
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Kitchen sink
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Water closet
Correct Answer
A. Water closetExplanation
A water closet is a fixture that has a built-in trap. A trap is a curved section of pipe that holds water and prevents sewer gases from entering the building. In the case of a water closet, the trap is built into the base of the toilet bowl. This design ensures that there is always a barrier of water in the trap, preventing odors from escaping into the bathroom. The other fixtures listed, such as a lavatory, floor drain, and kitchen sink, may have traps as well, but a water closet is specifically designed with a built-in trap.Rate this question:
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- 24.
It is provided with a valve that can be activated by means of a lever or a push button to release a pre-determined quantity of water for flushing.
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Flushometer type water closet
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Tank type water closet
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Siphon vortex water closet
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Wall hung water closet
Correct Answer
A. Flushometer type water closetExplanation
A flushometer type water closet is equipped with a valve that can be activated using a lever or a push button. This valve allows for the release of a specific amount of water to flush the toilet. Unlike tank type water closets that rely on a tank of water to flush, flushometer type water closets have a direct water supply connection. This design allows for a more efficient and controlled flush, as the user can easily regulate the amount of water released for each flush.Rate this question:
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- 25.
What material are sanitary wares made of?
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Ceramics
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Plastic
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Stainless steel
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Glass
Correct Answer
A. CeramicsExplanation
Sanitary wares are made of ceramics due to their durability, resistance to stains, and ease of cleaning. Ceramics are also known for their ability to withstand high temperatures and their non-porous nature, making them hygienic for use in bathrooms and kitchens. Additionally, ceramics offer a wide range of design options, allowing for the creation of various shapes, sizes, and styles of sanitary wares to suit different preferences and needs.Rate this question:
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- 26.
Calculate the velocity of wastewater flowing through a pipe having a cross sectional area of 2 cm square and a discharge rate of 8 cu.m. per sec.
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40,000 m/sec
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60,000 m/sec
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80,000 m/sec
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1,00,000 m/sec
Correct Answer
A. 40,000 m/sec -
- 27.
The following is a standard size of a galvanized steel pipe EXCEPT __________.
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1/2"
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3/4"
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2 1/2"
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3 1/4"
Correct Answer
A. 3 1/4"Explanation
Galvanized steel pipes come in standard sizes that are widely used in plumbing and industrial applications due to their durability and resistance to corrosion. Common sizes include 1/2", 3/4", and 2 1/2", which are used for various purposes, such as household water lines and larger commercial supply systems. However, 3 1/4" is not a standard size for galvanized steel pipes. Pipe sizes generally increase in recognized increments, and 3 1/4" does not fit into the conventional range, making it the exception among the provided options.Rate this question:
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- 28.
Which of the following conditions qualifies the term "battery of fixtures"?
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Fixtures of similar type and class such as a group of water closets, lavatories, urinals, etc.
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Two or more fixtures connected to a common branch
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Fixtures that are adjacent to each other
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All of these
Correct Answer
A. All of theseExplanation
The term "battery of fixtures" refers to a group of fixtures that meet certain conditions. These conditions include the fixtures being of similar type and class, such as water closets, lavatories, urinals, etc. Additionally, these fixtures should be connected to a common branch. Lastly, the fixtures should be adjacent to each other. Therefore, the correct answer is "all of these" because all of these conditions must be met for a group of fixtures to be considered a battery of fixtures.Rate this question:
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- 29.
A kind of sewer system where both sanitary waste and storm water can be drained into.
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Sanitary sewer
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Waste water
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Storm sewer
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Combination sewer
Correct Answer
A. Combination sewerExplanation
A combination sewer is a type of sewer system that allows for the draining of both sanitary waste and stormwater. This system is designed to handle the disposal of both types of wastewater, preventing the mixing of sanitary waste with stormwater. By having a combination sewer, it ensures that both types of wastewater can be efficiently and effectively drained, reducing the risk of contamination and improving overall sanitation.Rate this question:
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- 30.
That property of plumbing material that allows mechanical deformation by extrusion,forging, rolling, etc, without fracturing. Galvanized steel pipe has this property.
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Malleability
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Hardness
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Ductility
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Brittleness
Correct Answer
A. MalleabilityExplanation
Malleability refers to the property of a material that allows it to be mechanically deformed without breaking or fracturing. Galvanized steel pipe, which is mentioned in the question, exhibits this property. It can be shaped through processes like extrusion, forging, and rolling without experiencing any fractures. Therefore, the correct answer is malleability.Rate this question:
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- 31.
Which of the following galvanized steel pipes is prescribed as standard for most waterline installation and commonly specified for water supply and distribution system application?
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Schedule 10
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Schedule 30
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Schedule 40
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Schedule 80
Correct Answer
A. Schedule 40Explanation
Schedule 40 galvanized steel pipes are commonly prescribed as the standard for most waterline installations and are widely specified for water supply and distribution system applications. This is because schedule 40 pipes have a thicker wall compared to schedule 10 and schedule 30 pipes, providing increased durability and resistance to pressure and corrosion. Schedule 80 pipes, on the other hand, have an even thicker wall, but they are not as commonly used for waterline installations as they are primarily designed for high-pressure applications.Rate this question:
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- 32.
Where should a float valve be installed?
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Urinal
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Lavatory
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Cistern
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Sink
Correct Answer
A. CisternExplanation
A float valve should be installed in a cistern. A cistern is a container that holds water, typically used for storing water for toilets or flushing mechanisms. A float valve is a device that regulates the water level in the cistern by opening or closing a valve based on the water level. By installing a float valve in the cistern, it ensures that the water level remains at the desired level, preventing overflow or inadequate water supply for flushing.Rate this question:
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- 33.
A water treatment process whereby salt content in water is removed thereby rendering water potable. The process is done by heating seawater then pumping water into low pressure vessels where water is partially vaporized. Water vapor is then condensed and turned into potable water.
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Desalting
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Evaporation
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Condensation
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Desalination
Correct Answer
A. DesalinationExplanation
Desalination is the correct answer because it refers to the process of removing salt content from water, making it potable. This is achieved by heating seawater, which causes the water to partially vaporize in low pressure vessels. The resulting water vapor is then condensed and transformed into drinkable water.Rate this question:
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- 34.
Which of the following devices, methods or contraption can prevent backflow in either water supply or drainage system?
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Check valve
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Backflow preventor
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Air break
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All of these
Correct Answer
A. All of theseExplanation
All of the mentioned devices, methods or contraptions can prevent backflow in either water supply or drainage systems. A check valve is a mechanical device that allows the flow of fluid in one direction while preventing reverse flow. A backflow preventer is a specialized valve that ensures water flows in one direction only, preventing contamination of the water supply. An air break is a physical gap in a plumbing system that prevents backflow by allowing air to enter the system. Therefore, all of these options are effective in preventing backflow.Rate this question:
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- 35.
It refers to the continuous exchange of water within the hydrosphere, between the atmosphere, ground surface, underground and water surface.
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Ecological cycle
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Atmospheric cycle
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Hydrological cycle
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Meteorological cycle
Correct Answer
A. Hydrological cycleExplanation
The hydrological cycle refers to the continuous exchange of water within the hydrosphere, including the atmosphere, ground surface, underground, and water surface. This cycle involves processes such as evaporation, condensation, precipitation, and runoff, which play a crucial role in maintaining the distribution and availability of water on Earth.Rate this question:
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- 36.
A 1/8 bend or sweep is a fitting having an angle equivalent to ___________.
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90 degree
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60 degree
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45 degree
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22 1/2 degree
Correct Answer
A. 45 degreeExplanation
A 1/8 bend or sweep is a fitting that is commonly used in plumbing and piping systems. It is designed to change the direction of the pipe by an angle equivalent to 45 degrees. This fitting allows for a gradual change in direction, reducing the risk of blockages and ensuring smooth flow of fluids or gases through the system. Its angle of 45 degrees makes it suitable for various applications where a slight change in direction is required.Rate this question:
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- 37.
Which of the following types of fitting is generally used in sanitary drainage system installation?
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Wye branch
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Straight tee
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Nipple
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Union
Correct Answer
A. Wye branchExplanation
A wye branch is generally used in sanitary drainage system installation because it allows for a smooth flow of waste and water. It is designed with a Y-shaped branch that connects to the main pipe, allowing waste to be diverted without causing clogs or blockages. The wye branch is an essential fitting in plumbing systems as it helps maintain the proper functioning and efficiency of the drainage system.Rate this question:
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- 38.
What kind of joint is used on copper tubes when making a joint?
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Solvent cement welding
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Soldered joint
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Threaded joint
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Heat fusion joint
Correct Answer
A. Soldered jointExplanation
A soldered joint is used on copper tubes when making a joint. In this process, a filler metal with a lower melting point than the copper is heated and applied to the joint, creating a bond between the two pieces. This method is commonly used in plumbing and electrical applications, as it provides a strong and reliable connection.Rate this question:
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- 39.
A prefabricated plumbing device or item that is used to connect one or more pipes and/or used to change direction of straight run of pipes.
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Fixture
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Fitting
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Appurtenance
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Fixture trim
Correct Answer
A. FittingExplanation
A fitting is a prefabricated plumbing device or item that is used to connect one or more pipes and/or used to change the direction of a straight run of pipes. It is a versatile component that allows for the efficient and effective installation of plumbing systems. Fittings come in various shapes and sizes to accommodate different pipe sizes and configurations, ensuring a secure and leak-free connection. They play a crucial role in the overall functionality and reliability of plumbing systems.Rate this question:
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- 40.
A kind of pipe that is manufactured from an alloy of 85% copper and 15% zinc.
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Bronze
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Aluminum
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Brass
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Cast iron
Correct Answer
A. BrassExplanation
Brass is the correct answer because it is a type of pipe that is made from an alloy consisting of 85% copper and 15% zinc. This combination of metals gives brass its unique properties, such as its durability, corrosion resistance, and attractive golden color. Brass pipes are commonly used in plumbing and other applications where strength and resistance to wear and tear are important.Rate this question:
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- 41.
A device used in conjunction with a fixture such as water closet and urinal which discharges a pre-determined quantity of water for flushing purposes. This device is actuated by direct water pressure from branch pipes.
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Vacuum breaker
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Flushometer valve
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Fixture trim
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Flush valve
Correct Answer
A. Flushometer valveExplanation
A flushometer valve is a device that is used in conjunction with fixtures like water closets and urinals to release a pre-determined amount of water for flushing. It is activated by the direct water pressure from branch pipes.Rate this question:
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- 42.
The process of removing suspended matter in water along with some discoloration using hydrate sulfate commonly called alum to form a gelatinous substance; the process is also known as flocculation
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Filtration
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Aeration
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Ultraviolet radiation
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Coagulation
Correct Answer
A. CoagulationExplanation
Coagulation is the correct answer because it refers to the process of using hydrate sulfate (alum) to form a gelatinous substance that removes suspended matter and discoloration from water. This process, also known as flocculation, helps in the removal of impurities by causing them to clump together and settle, making it easier to filter them out. Aeration, ultraviolet radiation, and filtration are not suitable answers as they do not involve the use of alum or the formation of a gelatinous substance.Rate this question:
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- 43.
What is the most common type of water distribution system which depends on the pressure from the water main
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Direct (pressure) system
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Hydropneumatic system
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Upfeed and gravity distribution system
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Upfeed (pump)system
Correct Answer
A. Direct (pressure) systemExplanation
The most common type of water distribution system that relies on the pressure from the water main is the direct (pressure) system. This system directly connects the water main to the buildings and uses the pressure from the main to distribute water throughout the network of pipes. It does not require any additional pumps or storage tanks to maintain the pressure.Rate this question:
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- 44.
A type of water pump commonly used in houses and buildings for transporting water from lower to higher elevation; it contains an impeller mounted on a rotating shaft. The rotation of impeller increases water velocity while forcing water into a casing, thus converting water velocity into higher pressure and forcing water out of the impeller as discharge.
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Centrifugal pump
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Jet pump
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Rotary pump
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Reciprocating pump
Correct Answer
A. Centrifugal pumpExplanation
A centrifugal pump is a type of water pump commonly used in houses and buildings. It works by using an impeller mounted on a rotating shaft. As the impeller rotates, it increases the water velocity and forces the water into a casing. This conversion of water velocity into higher pressure results in the water being forced out of the impeller as discharge.Rate this question:
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- 45.
Which kind of valve is used to control or regulate the flow of water in water supply system along water service pipe section?
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Globe valve
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Angle valve
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Float valve
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Gate valve
Correct Answer
A. Gate valveExplanation
A gate valve is used to control or regulate the flow of water in a water supply system along the water service pipe section. This type of valve has a flat closure element that slides perpendicular to the flow, allowing for a full and unobstructed path for the water when fully open. It is commonly used in applications where a tight shut-off is required, as it provides a reliable and efficient means of controlling the water flow.Rate this question:
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- 46.
Which of the following copper tube types is the heaviest?
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type K
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Type L
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Type M
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Type DWV
Correct Answer
A. type KExplanation
Type K copper tube is the heaviest among the given options. Copper tubing is categorized based on its thickness, with type K having the thickest walls. This makes it the heaviest option as it contains more copper material compared to the other types. Type K copper tube is commonly used in high-pressure applications such as underground water service lines, fire sprinkler systems, and gas distribution.Rate this question:
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- 47.
A word that is synonymous with hub; it is the enlarged end portion of a pipe into which another pipe of the same or different size may be inserted into.
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Spigot
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Bell
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Body
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Flange
Correct Answer
A. BellExplanation
The correct answer is "bell." In the context of pipes, a bell refers to the enlarged end portion of a pipe that allows another pipe of the same or different size to be inserted into it. This term is synonymous with "hub" and is commonly used in plumbing and pipe fittings.Rate this question:
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- 48.
The following are examples of plumbing fixtures EXCEPT _____________
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Urinal
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Bidet
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Trap
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Floor drain
Correct Answer
A. TrapExplanation
The given question asks for examples of plumbing fixtures, and the correct answer is "trap." A trap is a plumbing device used to prevent the backflow of sewer gases into a building. It is typically installed beneath sinks, showers, and other fixtures to trap water and create a barrier between the living space and the sewage system. The other options listed, such as urinal, bidet, and floor drain, are indeed examples of plumbing fixtures, but the trap is not.Rate this question:
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- 49.
A general term which refers to the process of removing contaminants from water. It involves several processes that is intended to render raw water into potable and safe water for consumption.
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Water purification
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Water filtration
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Water softening
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Water desalination
Correct Answer
A. Water purificationExplanation
Water purification is the correct answer because it is the most encompassing term that refers to the overall process of removing contaminants from water. This process involves various methods and techniques to transform raw water into safe and drinkable water. While water filtration, softening, and desalination are all specific methods of water purification, they do not cover the entire process as comprehensively as the term "water purification" does.Rate this question:
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Oct 28, 2024Quiz Edited by
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Jan 16, 2017Quiz Created by
Grazel Marcos