Master Plumber Pre-board Exam Practice Test

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Master Plumber Pre-board Exam Practice Test - Quiz

Pre-Board examinations fall during this time. And as the name suggests, these exams are prelims conducted before Board examinations. They usually take place immediately after the winter vacations when the syllabus is complete. Test your preparation for that master Plumber Pre-board exam using the quiz below. Best of luck!


Questions and Answers
  • 1. 

    What kind of internally threaded galvanized fitting is used to close the end of an externally threaded pipe?

    • A.

      Cap

    • B.

      Plug

    • C.

      Bushing

    • D.

      Flange

    Correct Answer
    A. Cap
    Explanation
    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.

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  • 2. 

    In water supply system, it is the first section of water supply piping in a building after the water meter.

    • A.

      Water main

    • B.

      Water distributing pipe

    • C.

      Building supply pipe

    • D.

      Water service pipe

    Correct Answer
    C. Building supply pipe
    Explanation
    The building supply pipe refers to the initial section of water supply piping in a building, located after the water meter. This pipe is responsible for distributing water throughout the building's internal plumbing system. It is distinct from the water main, which refers to the primary pipe that delivers water from the main source to the building. The building supply pipe plays a crucial role in supplying water to various fixtures and appliances within the building, ensuring a reliable water supply for the occupants.

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  • 3. 

    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.

    • A.

      Vacuum breaker

    • B.

      Flushometer valve

    • C.

      Fixture trim

    • D.

      Flush valve

    Correct Answer
    B. Flushometer valve
    Explanation
    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.

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  • 4. 

    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.

    • A.

      Spigot

    • B.

      Bell

    • C.

      Body

    • D.

      Flange

    Correct Answer
    B. Bell
    Explanation
    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.

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  • 5. 

    A vertical pipe that collects sewage from fixtures such as water closet, urinal, was basin, floor drain, etc. via horizontal branches

    • A.

      Waste stack

    • B.

      Vent stack

    • C.

      Soil branch

    • D.

      Soil and waste stack

    Correct Answer
    D. Soil and waste stack
    Explanation
    The correct answer is "soil and waste stack." A soil and waste stack is a vertical pipe that collects sewage from various fixtures such as water closets, urinals, wash basins, and floor drains through horizontal branches. This pipe is responsible for carrying both solid waste (soil) and liquid waste (waste) from these fixtures to the main sewage system.

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  • 6. 

    Which of the following plumbing system items is considered a plumbing appurtenance?

    • A.

      Vacuum breaker

    • B.

      Tap

    • C.

      Water closet

    • D.

      Swimming pool

    Correct Answer
    A. Vacuum breaker
    Explanation
    A plumbing appurtenance refers to a device or accessory that is connected to a plumbing system. In this case, a vacuum breaker is considered a plumbing appurtenance. It is a device that prevents backflow of water from the plumbing system into the potable water supply. This is crucial in maintaining the safety and quality of the water supply by preventing contamination. Unlike the tap, water closet, and swimming pool, which are not specifically designed to prevent backflow, the vacuum breaker serves a specific function in the plumbing system.

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  • 7. 

    Which type of venting system is used to provide ventilation to two (2) fixture traps usually placed side-by-side or back to back?

    • A.

      Individual vent

    • B.

      Common vent

    • C.

      Circuit vent

    • D.

      Loop vent

    Correct Answer
    B. Common vent
    Explanation
    A common vent is used to provide ventilation to two fixture traps that are usually placed side-by-side or back to back. This type of venting system allows both fixtures to share a single vent, reducing the need for separate vent pipes. By sharing a common vent, the fixtures can effectively release air pressure and prevent siphoning, ensuring proper drainage and preventing the buildup of sewer gases.

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  • 8. 

    The following are examples of plumbing fixtures EXCEPT _____________

    • A.

      Urinal

    • B.

      Bidet

    • C.

      Trap

    • D.

      Floor drain

    Correct Answer
    C. Trap
    Explanation
    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.

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  • 9. 

    A kind of trap seal loss resulting from change in temperature. It usually happens when fixture is not always used.

    • A.

      Backpressure

    • B.

      Evaporation

    • C.

      Siphonage

    • D.

      Capillary action

    Correct Answer
    B. Evaporation
    Explanation
    Evaporation is the correct answer because it refers to the loss of trap seal due to a change in temperature. When a fixture is not consistently used, the water in the trap can evaporate, causing the seal to be lost. This can lead to the escape of sewer gases or the backflow of wastewater, resulting in unpleasant odors and potential health hazards.

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  • 10. 

    A kind of faucet with external threads provided at its outlet to which a hose may be attached.

    • A.

      Hose bibb

    • B.

      Ball valve

    • C.

      Compression faucet

    • D.

      Self closing faucet

    Correct Answer
    A. Hose bibb
    Explanation
    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.

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  • 11. 

    What type of ventilation system is used in fixtures such as sinks that are located away from walls and partitions?

    • A.

      Unit vent

    • B.

      Back vent

    • C.

      Ejector vent

    • D.

      Looped vent

    Correct Answer
    D. Looped vent
    Explanation
    A looped vent is used in fixtures such as sinks that are located away from walls and partitions. This type of ventilation system involves creating a loop in the vent pipe, which allows for proper air circulation and prevents the buildup of sewer gases. By looping the vent, it ensures that the fixture has a reliable source of fresh air and allows for efficient drainage. This design is particularly useful in situations where there is no nearby wall or partition to connect the vent to.

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  • 12. 

    Which of the following conditions qualifies the term "battery of fixtures"?

    • A.

      Fixtures of similar type and class such as a group of water closets, lavatories, urinals, etc.

    • B.

      Two or more fixtures connected to a common branch

    • C.

      Fixtures that are adjacent to each other

    • D.

      All of these

    Correct Answer
    D. All of these
    Explanation
    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.

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  • 13. 

    Where may be a cleanout be omitted?

    • A.

      At the upper end of every horizontal soil or waste branch

    • B.

      At the base of stack

    • C.

      At 1.5 m from a fixture

    • D.

      At 15 meters or less length of horizontal run of waste and soil pipe

    Correct Answer
    C. At 1.5 m from a fixture
    Explanation
    A cleanout may be omitted at 1.5 m from a fixture because this distance is within the acceptable range for the length of a horizontal run of waste and soil pipe. Cleanouts are typically installed at intervals to provide access for cleaning and maintenance of the plumbing system. However, if the distance between a fixture and the nearest cleanout is relatively short, such as 1.5 m, it may be deemed unnecessary to install an additional cleanout in that specific location.

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  • 14. 

    It refers to the continuous exchange of water within the hydrosphere, between the atmosphere, ground surface, underground and water surface.

    • A.

      Ecological cycle

    • B.

      Atmospheric cycle

    • C.

      Hydrological cycle

    • D.

      Meteorological cycle

    Correct Answer
    C. Hydrological cycle
    Explanation
    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.

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  • 15. 

    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

    • A.

      Filtration

    • B.

      Aeration

    • C.

      Ultraviolet radiation

    • D.

      Coagulation

    Correct Answer
    D. Coagulation
    Explanation
    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.

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  • 16. 

    What is the most common type of water distribution system which depends on the pressure from the water main

    • A.

      Direct (pressure) system

    • B.

      Hydropneumatic system

    • C.

      Upfeed and gravity distribution system

    • D.

      Upfeed (pump)system

    Correct Answer
    A. Direct (pressure) system
    Explanation
    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.

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  • 17. 

    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.

    • A.

      Desalting

    • B.

      Evaporation

    • C.

      Condensation

    • D.

      Desalination

    Correct Answer
    D. Desalination
    Explanation
    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.

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  • 18. 

    In the coliform group of bacteria, e. coli is present in fecal matter as well those birds and other animals. What is 'e' in the abbreviation e.coli?

    • A.

      Entamoeba

    • B.

      Escherichia

    • C.

      Excreta

    • D.

      Enzyme

    Correct Answer
    B. Escherichia
    Explanation
    The correct answer is 'escherichia'. In the abbreviation e.coli, 'e' stands for 'escherichia'. Escherichia coli is a type of bacteria that is commonly found in the intestines of animals and humans. It can be present in fecal matter as well as in birds and other animals.

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  • 19. 

    A vertical length of soil or waste stack at least eight feet in height (a storey height) , within which the horizontal branches from one storey or floor of the building or structure are connected to the stack.

    • A.

      Fixture branch

    • B.

      Branch drain

    • C.

      Branch pipe

    • D.

      Branch interval

    Correct Answer
    D. Branch interval
    Explanation
    The term "branch interval" refers to a vertical length of soil or waste stack that is at least eight feet in height. This interval is used to connect the horizontal branches from one storey or floor of a building or structure to the stack. Essentially, it is a designated space within the stack where the branches are connected.

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  • 20. 

    That part of the drainage system that extends from the end of the building drain and conveys its discharge to the public sewer, private sewer, individual sewage disposal system, or other appropriate point disposal

    • A.

      Building sewer

    • B.

      Building drain

    • C.

      Building storm drain

    • D.

      Building sewage pipe

    Correct Answer
    A. Building sewer
    Explanation
    The correct answer is building sewer. The building sewer refers to the part of the drainage system that connects the building drain to the public or private sewer, individual sewage disposal system, or any other suitable point of disposal. It is responsible for conveying the discharge from the building drain to the appropriate disposal point, ensuring proper waste management and preventing any potential environmental or health hazards.

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  • 21. 

    What property of water is characterized by its ability to stick and pull itself together. It can be demonstrated on a dripping tap where water cling to its orifice and forms tiny globules that stretches before it fall.

    • A.

      Capillary action

    • B.

      Dissolving ability of water

    • C.

      Absorption

    • D.

      Surface tension

    Correct Answer
    D. Surface tension
    Explanation
    Surface tension is the property of water that allows it to stick to itself and pull itself together. This can be observed when water clings to the orifice of a dripping tap and forms tiny globules that stretch before falling. Surface tension is caused by the cohesive forces between water molecules, which create a "skin" on the surface of the water. This property is responsible for many phenomena, such as the formation of droplets, the ability of insects to walk on water, and the capillary action in plants.

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  • 22. 

    Wastewater which comes from discharge of laundry trays, lavatories, bathtubs, etc.

    • A.

      Black water

    • B.

      Grey water

    • C.

      Contaminated water

    • D.

      Hard water

    Correct Answer
    B. Grey water
    Explanation
    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.

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  • 23. 

    Where do you install a flushometer valve?

    • A.

      Urinal

    • B.

      Bathtub

    • C.

      Lavatory

    • D.

      Bidet

    Correct Answer
    A. Urinal
    Explanation
    A flushometer valve is typically installed in a urinal.

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  • 24. 

    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.

    • A.

      Water and waste service system

    • B.

      Water pipeline system

    • C.

      Water supply and distribution system

    • D.

      Building water service and sewage piping system

    Correct Answer
    C. Water supply and distribution system
    Explanation
    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.

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  • 25. 

    Any pipe which conveys the discharge of water closet, urinals or fixtures having similar function, with or without the discharge from other fixtures to the building drain or building sewer.

    • A.

      Soil pipe

    • B.

      Waste pipe

    • C.

      Building drain

    • D.

      Building sewer

    Correct Answer
    A. Soil pipe
    Explanation
    A soil pipe is a type of pipe that is used to carry the waste discharge from water closets, urinals, or similar fixtures, either on its own or in combination with other fixtures, to the building drain or building sewer. It is specifically designed for this purpose and is different from waste pipes, building drains, and building sewers, which may serve different functions in the plumbing system.

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  • 26. 

    A pipe which conveys potable water from the building supply pipe to the plumbing fixtures and other outlets.

    • A.

      Water service pipe

    • B.

      Water main

    • C.

      Water distributing pipe

    • D.

      Building water supply pipe

    Correct Answer
    C. Water distributing pipe
    Explanation
    A water distributing pipe is a pipe that carries potable water from the main supply pipe to various plumbing fixtures and outlets within a building. It is responsible for distributing the water to different areas or rooms where it is needed. Unlike the water main, which refers to the primary pipe that brings water into a building or neighborhood, the water distributing pipe specifically focuses on delivering water within the building itself.

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  • 27. 

    A vertical pipe which conveys only wastewater or liquid waste free from fecal matter.

    • A.

      Waste pipe

    • B.

      Soil pipe

    • C.

      Soil stack

    • D.

      Waste stack

    Correct Answer
    D. Waste stack
    Explanation
    The term "waste stack" refers to a vertical pipe that is specifically designed to carry wastewater or liquid waste that does not contain any fecal matter. This distinguishes it from other options like a waste pipe, soil pipe, or soil stack, which may also transport wastewater but may also handle fecal matter. The use of the term "waste stack" indicates that the pipe is dedicated solely to the conveyance of liquid waste that is free from fecal matter.

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  • 28. 

    A suction created by the flow of liquid in pipes; a pressure less than the atmospheric pressure.

    • A.

      Backflow

    • B.

      Backpressure

    • C.

      Siphonage

    • D.

      Flow pressure

    Correct Answer
    C. Siphonage
    Explanation
    Siphonage refers to the suction created by the flow of liquid in pipes, resulting in a pressure that is lower than the atmospheric pressure. This phenomenon allows the liquid to be drawn upwards against gravity and flow from a higher level to a lower level.

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  • 29. 

    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.

    • A.

      Trap

    • B.

      Fitting

    • C.

      Pipe

    • D.

      Valve

    Correct Answer
    A. Trap
    Explanation
    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.

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  • 30. 

    Which of the following devices, methods or contraption can prevent backflow in either water supply or drainage system?

    • A.

      Check valve

    • B.

      Backflow preventor

    • C.

      Air break

    • D.

      All of these

    Correct Answer
    D. All of these
    Explanation
    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.

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  • 31. 

    A water supply pipe that extends vertically one full storey or more to convey water to fixture branches or group of fixtures.

    • A.

      Up-pipe

    • B.

      Riser

    • C.

      Stack pipe

    • D.

      Water stack

    Correct Answer
    B. Riser
    Explanation
    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.

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  • 32. 

    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.

    • A.

      Roughing-in

    • B.

      Mock-up installation

    • C.

      Pre-installation

    • D.

      Setting

    Correct Answer
    A. Roughing-in
    Explanation
    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.

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  • 33. 

    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.

    • A.

      Self- closing faucet

    • B.

      Compression faucet

    • C.

      Center set faucet

    • D.

      Gooseneck

    Correct Answer
    D. Gooseneck
    Explanation
    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.

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  • 34. 

    Gutters, downspouts, leaders, catch basins, junction boxes, area drains, etc. are components of what system in plumbing?

    • A.

      Sanitary drainage system

    • B.

      Water supply system

    • C.

      Storm drainage system

    • D.

      Ventilation system

    Correct Answer
    C. Storm drainage system
    Explanation
    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.

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  • 35. 

    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.

    • A.

      Seepage pit

    • B.

      Cesspool

    • C.

      Septic tank

    • D.

      Privy vault

    Correct Answer
    C. Septic tank
    Explanation
    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.

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  • 36. 

    The following are components of a basic plumbing system EXCEPT _________.

    • A.

      Fixtures

    • B.

      Valves

    • C.

      Utility box

    • D.

      Fittings

    Correct Answer
    C. Utility box
    Explanation
    The components of a basic plumbing system include fixtures, valves, and fittings. However, a utility box is not typically considered a component of a plumbing system.

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  • 37. 

    Which of the following is a violation or contradictory to the basic plumbing principles?

    • A.

      Plumbing system shall be maintained in a sanitary and serviceable condition

    • B.

      Water closet may be located in an unlit or unventilated room

    • C.

      Plumbing fixtures shall be designed and adjusted to use minimum amount of water for flushing

    • D.

      All premises intended for human habitation shall be provided with ample and wholesome amount of water

    Correct Answer
    B. Water closet may be located in an unlit or unventilated room
    Explanation
    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.

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  • 38. 

    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.

    • A.

      Water purification

    • B.

      Water filtration

    • C.

      Water softening

    • D.

      Water desalination

    Correct Answer
    A. Water purification
    Explanation
    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.

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  • 39. 

    A kind of sewer system where both sanitary waste and storm water can be drained into.

    • A.

      Sanitary sewer

    • B.

      Waste water

    • C.

      Storm sewer

    • D.

      Combination sewer

    Correct Answer
    D. Combination sewer
    Explanation
    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.

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  • 40. 

    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.

    • A.

      Well

    • B.

      River, streams or lake

    • C.

      Precipitate

    • D.

      Surface run-off

    Correct Answer
    A. Well
    Explanation
    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.

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  • 41. 

    A process of plugging a opening with oakum, lead or other material that are pounded into the annular space of a bell and spigot type of cast iron pipe.

    • A.

      Cogging

    • B.

      Calking

    • C.

      Caulking

    • D.

      All of these

    Correct Answer
    C. Caulking
    Explanation
    Caulking is the process of sealing an opening in a bell and spigot type of cast iron pipe using materials like oakum or lead. These materials are pounded into the annular space to prevent leaks. Caulking ensures a tight seal and maintains the integrity of the pipe system.

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  • 42. 

    Which of the following fixtures has a built-in trap?

    • A.

      Lavatory

    • B.

      Floor drain

    • C.

      Kitchen sink

    • D.

      Water closet

    Correct Answer
    D. Water closet
    Explanation
    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.

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  • 43. 

    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.

    • A.

      Soil piping system

    • B.

      Ventilation system

    • C.

      Storm drainage system

    • D.

      Sewage disposal system

    Correct Answer
    B. Ventilation system
    Explanation
    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.

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  • 44. 

    What kind of fitting is used to connect a lavatory arm to a drain pipe with an angle of 90 degree?

    • A.

      Wye branch

    • B.

      Upright wye branch

    • C.

      Sanitary tee

    • D.

      Bend fitting

    Correct Answer
    B. Upright wye branch
    Explanation
    The correct answer is "upright wye branch." An upright wye branch is a fitting that allows the connection of a lavatory arm to a drain pipe with a 90-degree angle. It provides a vertical connection for the lavatory arm while maintaining a 90-degree angle with the main drain pipe.

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  • 45. 

    A type of cast iron pipe having one end with bell and the other end a spigot

    • A.

      Single hub pipe

    • B.

      Standard pipe

    • C.

      Double hub pipe

    • D.

      Hubless pipe

    Correct Answer
    A. Single hub pipe
    Explanation
    A single hub pipe refers to a type of cast iron pipe that has one end with a bell and the other end with a spigot. The bell end is wider and flared, allowing the spigot end of another pipe to fit snugly inside it, creating a secure connection. This design is commonly used in plumbing systems to facilitate easy and efficient installation, as the bell and spigot ends can be easily joined together without the need for additional fittings or connectors.

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  • 46. 

    That property of plumbing material that allows mechanical deformation by extrusion,forging, rolling, etc, without fracturing. Galvanized steel pipe has this property.

    • A.

      Malleability

    • B.

      Hardness

    • C.

      Ductility

    • D.

      Brittleness

    Correct Answer
    A. Malleability
    Explanation
    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.

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  • 47. 

    This fitting is used to connect sections of pipes that are perpendicular to each other. It has an outside thread on one end and inside thread on the other.

    • A.

      Straight elbow

    • B.

      Elbow reducer

    • C.

      Street elbow

    • D.

      Eccentric elbow reducer

    Correct Answer
    C. Street elbow
    Explanation
    A street elbow is a fitting that is used to connect sections of pipes that are perpendicular to each other. It has an outside thread on one end and an inside thread on the other. This type of fitting allows for a 90-degree change in direction while also providing a threaded connection for easy installation and removal. The term "street" in the name refers to the fact that one end of the fitting is designed to be connected to a pipe that is already in place.

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  • 48. 

    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.

    • A.

      Fixture

    • B.

      Fitting

    • C.

      Appurtenance

    • D.

      Fixture trim

    Correct Answer
    B. Fitting
    Explanation
    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.

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  • 49. 

    A valve in which the flow of water is cut off by means of a circular disk that fits against the valve seat. The plane of movement of the disk is parallel to the normal direction of flow of water, which is turned through a tortuous passage to direct the flow normal to the face of the disk.

    • A.

      Gate valve

    • B.

      Check valve

    • C.

      Globe valve

    • D.

      Angle valve

    Correct Answer
    C. Globe valve
    Explanation
    A globe valve is a type of valve that uses a circular disk to cut off the flow of water. The disk moves in a plane parallel to the normal direction of water flow. In order to redirect the flow, the water is turned through a tortuous passage, causing it to flow normal to the face of the disk. Therefore, the correct answer is globe valve.

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  • 50. 

    A 1/8 bend or sweep is a fitting having an angle equivalent to ___________.

    • A.

      90 degree

    • B.

      60 degree

    • C.

      45 degree

    • D.

      22 1/2 degree

    Correct Answer
    C. 45 degree
    Explanation
    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.

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Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Feb 15, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 16, 2017
    Quiz Created by
    Grazel Marcos
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