Master Plumber Pre-board Exam Part 2

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  • 1/100 Questions

    Storm water refers to _________.

    • Rainwater, surface run-off
    • Liquid plus human waste
    • Waste from laundry, sink, etc.
    • Domestic sewage
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About This Quiz

This Master Plumber Pre-board Exam part 2 assesses essential skills in plumbing, focusing on tools, installation techniques, and code compliance. It is designed for individuals preparing for professional certification, enhancing both theoretical knowledge and practical application in plumbing.

Master Plumber Pre-board Exam Part 2 - Quiz

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  • 2. 

    A bidet is a plumbing fixture used for washing ______________.

    • Body

    • Face

    • External genitalia

    • Feet

    Correct Answer
    A. External genitalia
    Explanation
    A bidet is a plumbing fixture used for washing external genitalia. It is designed to provide a hygienic and efficient way to clean the genital area after using the toilet. Bidets typically have a spray nozzle or jet of water that can be adjusted to the desired pressure and temperature. By using a bidet, individuals can maintain cleanliness and freshness in this sensitive area, promoting good personal hygiene and reducing the risk of infections or discomfort.

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  • 3. 

    What is the recommended slope percentage of horizontal drainage pipe as provided in the code ?

    • 1%

    • 2%

    • 3%

    • 4%

    Correct Answer
    A. 2%
    Explanation
    The recommended slope percentage of horizontal drainage pipe as provided in the code is 2%. This means that the pipe should have a downward slope of 2% for every horizontal foot. This slope is necessary to ensure proper drainage and prevent the accumulation of water or waste in the pipe. A 2% slope allows for efficient flow and helps to prevent clogs or blockages in the pipe.

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  • 4. 

    What is the other word for toilet?

    • Water closet

    • Urinal

    • Lavatory

    • Kitchen sink

    Correct Answer
    A. Water closet
    Explanation
    The other word for toilet is "water closet". This term is commonly used in British English to refer to a toilet or a small room containing a toilet. It is derived from the historical practice of having a small closet-like space with a water-flushing toilet.

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  • 5. 

    Where do you install a flushometer valve?

    • Urinal

    • Lavatory

    • Bathtub

    • Kitchen sink

    Correct Answer
    A. Urinal
    Explanation
    A flushometer valve is typically installed in a urinal. This type of valve is designed to provide a powerful flush to effectively clean and clear the waste from a urinal bowl. It is commonly used in commercial restrooms and public facilities where urinals are installed. The flushometer valve allows for a quick and efficient flush, ensuring proper sanitation and hygiene in the urinal area.

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  • 6. 

    Where do you connect a downspout?

    • Septic tank

    • Storm drain

    • Cesspool

    • Privy

    Correct Answer
    A. Storm drain
    Explanation
    A downspout is connected to a storm drain. A storm drain is a system of pipes and drains that collect and carry rainwater away from buildings and roads, preventing flooding. Connecting a downspout to a storm drain ensures that rainwater from the roof is directed away from the building and into the storm drain system. This helps to prevent water damage and maintain the integrity of the building's foundation. Connecting a downspout to a septic tank, cesspool, or privy would not be appropriate as these are systems for waste disposal, not rainwater drainage.

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  • 7. 

    An insanitary type of water closet. What is it?

    • Hooper type

    • Plunger type

    • Pan type

    • All of these

    Correct Answer
    A. All of these
    Explanation
    The correct answer is "all of these" because an insanitary type of water closet can refer to any of the mentioned types: Hooper type, Plunger type, or Pan type. These types of water closets are considered insanitary due to their design or functionality, which may not meet proper hygiene standards or provide adequate sanitation.

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  • 8. 

    Choose from the list the best type of sewage disposal system.

    • Seepage pit

    • Privy

    • Septic Tank

    • Cesspool

    Correct Answer
    A. Septic Tank
    Explanation
    A septic tank is the best type of sewage disposal system because it effectively treats and disposes of wastewater from households. It separates solid waste from the liquid, allowing the solids to settle at the bottom while the liquid flows out into a drain field for further treatment. This system is efficient, cost-effective, and environmentally friendly, as it helps prevent contamination of groundwater and soil. Additionally, septic tanks require less maintenance compared to other options like cesspools or privies.

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  • 9. 

    As defined, a floor drain is considered a/an ________.

    • Fitting

    • Fixture

    • Tool

    • Float valve

    Correct Answer
    A. Fixture
    Explanation
    A floor drain is considered a fixture because it is a permanent part of a building's plumbing system. Fixtures are devices or appliances that are connected to the plumbing system and provide a specific function, such as a sink, toilet, or shower. A floor drain is designed to allow water to drain from the floor, preventing flooding or water damage. It is installed in specific locations, such as bathrooms, basements, or laundry rooms, and is an essential component of the plumbing system in a building.

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  • 10. 

    What is the unit weight of water?

    • 1000 kgs per cu meter

    • 1500 kgs per cu meter

    • 2000 kgs per cu meter

    • 3000 kgs per cu meter

    Correct Answer
    A. 1000 kgs per cu meter
    Explanation
    The unit weight of water is 1000 kgs per cubic meter. This means that for every cubic meter of water, it weighs 1000 kilograms.

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  • 11. 

    Which of the following is NOT a commercial size of a galvanized steel pipe?

    • 2 ins.

    • 2 3/4 ins.

    • 1 1/2 ins.

    • 1 in.

    Correct Answer
    A. 2 3/4 ins.
    Explanation
    The given options are all measurements for the size of a galvanized steel pipe. However, 2 3/4 ins. is not a standard commercial size for such pipes.

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  • 12. 

    A term used to describe the installation of pipes, fittings, devices or other component parts of the plumbing system which can be completed prior to the installation of fixtures or finishing.

    • Pipelaying

    • Plumbing assembly

    • Roughing in

    • Mock up installation

    Correct Answer
    A. Roughing in
    Explanation
    Roughing in refers to the process of installing pipes, fittings, devices, or other components of a plumbing system before the fixtures or finishing touches are added. This allows for the necessary infrastructure to be put in place, such as water supply lines, drainage systems, and connections for fixtures like sinks, toilets, and showers. It is an essential step in the plumbing installation process, ensuring that all necessary components are properly positioned and connected before the final fixtures are added.

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  • 13. 

    The abbreviation DWV stands for ____________.

    • Drain, waste and vent

    • Drain, water and vent

    • Drainage, waste and velocity

    • Drainpipe waste volume

    Correct Answer
    A. Drain, waste and vent
    Explanation
    The abbreviation DWV stands for "Drain, waste and vent." This is a common term used in plumbing systems to describe the three main functions of a drainage system. The drain is responsible for removing waste water from fixtures, the waste carries the waste water to the sewer or septic system, and the vent allows air to enter the system to prevent pressure buildup and ensure proper drainage flow.

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  • 14. 

    Which of the following is used to achieve change in direction?

    • Pipe

    • Fitting

    • Fixture

    • Appurtenance

    Correct Answer
    A. Fitting
    Explanation
    A fitting is used to achieve change in direction. A fitting is a device that connects two or more pipes together, allowing for the flow of fluids or gases. It is designed to change the direction of the flow, such as turning a pipe at a right angle or redirecting it in a different direction. Fittings come in various shapes and sizes, including elbows, tees, and bends, and are essential components in plumbing and piping systems to ensure proper flow and functionality.

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  • 15. 

    An upright wye combination is a kind of ________.

    • Fixture

    • Tool

    • Pipe

    • Fitting

    Correct Answer
    A. Fitting
    Explanation
    An upright wye combination is a type of fitting. This fitting is used in plumbing systems to connect three pipes together in a Y-shaped configuration. It allows for the flow of fluids or gases in different directions.

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  • 16. 

    Which among the plumbing practices is prohibited under the code?

    • Double trapping a fixture

    • Providing a vent pipe to a fixture

    • Using fittings to connect pipes instead of bending

    • Providing an air gap or air break between the outlet and the flood level rim of a fixture

    Correct Answer
    A. Double trapping a fixture
    Explanation
    Double trapping a fixture is prohibited under the plumbing code because it can cause water to become trapped in the pipes, leading to blockages and potential backups. This can result in inefficient drainage and potential health hazards. The code aims to ensure proper plumbing practices that promote the safe and effective flow of water and waste.

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  • 17. 

    Which of the following materials is not recommended for water supply system application?

    • Concrete pipe

    • Brass pipe

    • Plastic pipe

    • Galvanized steel pipe

    Correct Answer
    A. Concrete pipe
    Explanation
    Concrete pipe is not recommended for water supply system application because it is prone to cracking and corrosion over time. Unlike other materials like brass, plastic, and galvanized steel, concrete pipes are not as durable and can deteriorate quickly when exposed to water and other elements. Additionally, concrete pipes are difficult to repair and maintain, making them less suitable for water supply systems that require regular maintenance and upkeep.

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  • 18. 

    Plastic pipes are manufactured from ___________.

    • Thermoplastic plastic

    • Thermoset plastic

    • Rubber-based plastic

    • None of the above

    Correct Answer
    A. Thermoplastic plastic
    Explanation
    Plastic pipes are manufactured from thermoplastic plastic because this type of plastic can be melted and reshaped multiple times without undergoing any significant chemical change. This property makes thermoplastic plastic ideal for pipe manufacturing as it allows for easy molding and customization. Thermoset plastic, on the other hand, undergoes a permanent chemical change when heated and cannot be reshaped. Rubber-based plastic is a specific type of thermoplastic that contains rubber additives for improved flexibility and durability. However, since the question does not specify rubber-based plastic, the correct answer is thermoplastic plastic.

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  • 19. 

    The term stack applies to what type of pipe?

    • Soil

    • Waste

    • Vent

    • All of these

    Correct Answer
    A. All of these
    Explanation
    The term "stack" refers to a type of pipe that is used for different purposes. In the context of plumbing, a stack can refer to a soil stack, which is a vertical pipe that carries waste from toilets and other soil-based plumbing fixtures. It can also refer to a waste stack, which carries waste from sinks, showers, and other non-soil plumbing fixtures. Additionally, a stack can refer to a vent stack, which is a pipe that helps to regulate air pressure in the plumbing system and prevent the buildup of gases. Therefore, the correct answer is that the term stack applies to all of these types of pipes.

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  • 20. 

    What type of copper tube is the heaviest?

    • Type K

    • Type L

    • Type M

    • Type DWV

    Correct Answer
    A. Type K
    Explanation
    Type K copper tube is the heaviest because it has the thickest walls compared to the other types. The thickness of the walls in Type K copper tube allows it to withstand higher pressures and makes it suitable for underground and water distribution systems. Type L and Type M copper tubes have thinner walls and are used for general plumbing purposes. Type DWV (Drain, Waste, and Vent) copper tube is specifically designed for drainage and waste systems and has even thinner walls compared to the other types.

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  • 21. 

    The following are the types of copper tubes EXCEPT __________.

    • Type K

    • Type L

    • Type M

    • Type N

    Correct Answer
    A. Type N
    Explanation
    The question is asking for the type of copper tubes that is not included in the given options. The options provided are Type K, Type L, Type M, and Type N. Since the question asks for the type that is not included, the correct answer is Type N.

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  • 22. 

    Which fitting or fitting combination is best used at the base of a soil or waste stack?

    • Short sweep, 1/4 bend

    • 1/4 bend

    • 2- 1/8 bend

    • Wye branch and 1/8 bend

    Correct Answer
    A. Wye branch and 1/8 bend
    Explanation
    The wye branch and 1/8 bend is the best fitting or fitting combination to use at the base of a soil or waste stack. This combination allows for a smooth flow of waste and minimizes the chances of clogs or blockages. The wye branch allows for a branch connection to another pipe, while the 1/8 bend provides a gradual change in direction. This combination ensures efficient drainage and proper functioning of the stack.

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  • 23. 

    An objectionable type of trap.

    • Full S trap

    • Bag trap

    • Metal partition trap

    • All of these

    Correct Answer
    A. All of these
    Explanation
    The correct answer is "all of these" because all three options mentioned - full S trap, bag trap, and metal partition trap - are considered objectionable types of traps. These traps are not recommended due to their potential to cause clogging, odors, and other plumbing issues. Therefore, it is advisable to avoid using any of these trap types.

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  • 24. 

    The other name of hub.

    • Bell

    • Spigot

    • Body

    • Sleeve

    Correct Answer
    A. Bell
    Explanation
    The correct answer is "Bell" because a bell is another name for a hub. A bell is a device that connects multiple devices or nodes in a network, allowing them to communicate with each other. It acts as a central point for data transmission and distribution. Therefore, "Bell" is the correct answer as it is synonymous with a hub in the context of networking.

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  • 25. 

    In a trap, what do you call the vertical distance between the top dip and the crown weir?

    • Overflow

    • Invert

    • Crown

    • Trap seal

    Correct Answer
    A. Trap seal
  • 26. 

    Technically, which of the following is considered a plumbing appliance?

    • Water closet

    • Washing machine

    • Swimming pool

    • Floor drain

    Correct Answer
    A. Washing machine
    Explanation
    A washing machine is considered a plumbing appliance because it requires a water supply and drainage system to operate. It is connected to a water source to fill the machine with water and also has a drain pipe to remove the dirty water after the washing cycle is complete. Additionally, a washing machine may also have a connection to a hot water supply for certain wash cycles. Therefore, it meets the criteria of being a plumbing appliance.

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  • 27. 

    What causes the bad taste and odor of water?

    • The lack of oxygen

    • The presence of algae

    • The lack of introgen

    • The pressure of mineral

    Correct Answer
    A. The presence of algae
    Explanation
    Algae can cause a bad taste and odor in water. Algae growth in water bodies is common and can be triggered by factors like warm temperatures, sunlight, and nutrient-rich conditions. When algae blooms occur, they release certain compounds that can give water an unpleasant taste and odor. These compounds can include geosmin and methylisoborneol, which are responsible for the earthy and musty smells often associated with algae-contaminated water. Therefore, the presence of algae is a likely cause of the bad taste and odor in water.

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  • 28. 

    Water for domestic use comes from these sources except

    • Ground water

    • Rain water

    • Surface water

    • Sea water

    Correct Answer
    A. Sea water
    Explanation
    Sea water is not a viable source for domestic use as it is highly saline and requires desalination processes to make it suitable for consumption. Ground water, rain water, and surface water, on the other hand, are commonly used sources for domestic water supply.

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  • 29. 

    Which plumbing principle is contrary to established principles as stipulated in the National Plumbing Code?

    • Water closet shall be located in a properly lighted and ventilated room

    • Plumbing system shall be maintained in a sanitary and serviceable condition

    • Vent terminal shall not extend above the roof

    • Fixture directly connected to the plumbing system shall be equipped with a water-sealed trap

    Correct Answer
    A. Vent terminal shall not extend above the roof
    Explanation
    The correct answer is "Vent terminal shall not extend above the roof". This is contrary to established principles in the National Plumbing Code because vent terminals are required to extend above the roof to ensure proper ventilation and prevent the buildup of harmful gases.

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  • 30. 

    To boost the water pressure of hot water, use

    • Elevated water tank

    • Hydroelectric tank

    • Gravity tank

    • Circulating pump

    Correct Answer
    A. Circulating pump
    Explanation
    A circulating pump is used to boost the water pressure of hot water. Unlike the other options, a circulating pump actively circulates the water, creating a continuous flow and increasing the pressure. This is especially useful in situations where the hot water needs to be distributed to multiple areas or floors, as it ensures a consistent and adequate water pressure throughout the system.

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  • 31. 

    Every exposed trap must _________.

    • Be self cleaning

    • Have inadequate trap seal in order to cause trap seal loss

    • Not be provided with a removable cleanout plug

    • Not be able to retain large amount of waste water

    Correct Answer
    A. Be self cleaning
    Explanation
    Exposure to debris and waste can cause traps to become clogged, leading to blockages and foul odors. By being self-cleaning, traps can prevent the buildup of waste and maintain proper drainage. This ensures that the trap seal is not compromised and the plumbing system functions effectively.

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  • 32. 

    Calculate the volume of a cylindrical tank having a diameter of 1 meter and a length of 2 meters.

    • 1.57 cu m.

    • 1.75 cu m.

    • 2.15 cu m.

    • 3.51 cu m.

    Correct Answer
    A. 1.57 cu m.
    Explanation
    The volume of a cylindrical tank can be calculated using the formula V = πr^2h, where V is the volume, r is the radius, and h is the height or length of the tank. In this case, the diameter is given as 1 meter, so the radius would be 0.5 meters. The length of the tank is given as 2 meters. Plugging these values into the formula, we get V = π(0.5^2)(2) = 1.57 cu m.

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  • 33. 

    DFU is a abbreviation used in sizing what part of the plumbing system?

    • Water supply pipes

    • Sanitary drainage pipes

    • Ventilation pipes

    • Storm drainage pipes

    Correct Answer
    A. Sanitary drainage pipes
    Explanation
    DFU stands for Drainage Fixture Unit, which is a measure of the flow rate and drainage capacity of a plumbing fixture or system. It is used to determine the size and capacity requirements for sanitary drainage pipes. By calculating the total DFU for all fixtures in a building, the appropriate pipe size can be determined to ensure efficient and effective drainage of waste water and sewage. Therefore, the correct answer is sanitary drainage pipes.

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  • 34. 

    It is used to remove external and internal burrs resulting from cutting of pipes.

    • Pipe bender

    • Torque wrench

    • Universal wrench

    • Combination reamer

    Correct Answer
    A. Combination reamer
    Explanation
    A combination reamer is a tool used to remove both external and internal burrs that occur during the cutting of pipes. This tool is designed specifically for this purpose and is effective in smoothing out the rough edges left after cutting. It is a versatile tool that can be used on various types of pipes and is commonly used in plumbing and metalworking applications. The combination reamer helps to ensure a clean and smooth finish on the pipes, improving their functionality and appearance.

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  • 35. 

    To boost the water pressure of hot water, use

    • Elevated water tank

    • Hydroelectric tank

    • Gravity tank

    • Circulating pump

    Correct Answer
    A. Circulating pump
    Explanation
    A circulating pump is used to boost the water pressure of hot water. Unlike an elevated water tank, hydroelectric tank, or gravity tank, a circulating pump actively moves the water, creating a continuous flow and increasing the pressure. This is especially useful in situations where the natural pressure is low or when there is a need for consistent and strong water pressure.

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  • 36. 

    The size of storm drainage system is dependent on the following items or parameters EXCEPT _____________.

    • Rate of rainfall

    • Slope of roof

    • Area of roof or deck

    • Type of pipe support

    Correct Answer
    A. Type of pipe support
    Explanation
    The size of a storm drainage system is determined by several factors such as the rate of rainfall, slope of the roof, and the area of the roof or deck. However, the type of pipe support does not affect the size of the storm drainage system. The pipe support is responsible for providing stability and preventing the pipes from sagging or collapsing, but it does not impact the overall size requirements of the drainage system.

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  • 37. 

    Which of the following galvanized iron pipes is the heaviest?

    • Schedule 10

    • Schedule 40

    • Schedule 60

    • Schedule 80

    Correct Answer
    A. Schedule 80
    Explanation
    The correct answer is Schedule 80. In galvanized iron pipes, the schedule refers to the thickness of the pipe wall. A higher schedule number indicates a thicker pipe wall and therefore a heavier pipe. Since Schedule 80 has a higher schedule number than Schedule 10, Schedule 40, and Schedule 60, it is the heaviest among the given options.

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  • 38. 

    What is the standard length of uPVC plastic or synthetic pipe?

    • 2000 mm

    • 3000 mm

    • 4000 mm

    • 5000 mm

    Correct Answer
    A. 3000 mm
    Explanation
    uPVC plastic or synthetic pipes typically have a standard length of 3000 mm. This length is commonly used in various applications such as plumbing, drainage, and irrigation systems. It is a convenient length that allows for easy installation and handling. Other lengths mentioned in the options (2000 mm, 4000 mm, and 5000 mm) may also be used in specific cases, but the standard length is 3000 mm.

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  • 39. 

    Waste in plumbing drainage are prohibited waste when you discharge

    • Alkaline waste

    • Inflammable waste

    • Acid waste

    • Toxic waste

    Correct Answer
    A. Toxic waste
    Explanation
    Toxic waste is prohibited in plumbing drainage because it can be harmful to the environment and human health. Toxic waste contains substances that are poisonous or can cause serious health issues if exposed to them. Discharging toxic waste into plumbing drainage can contaminate water sources, pollute ecosystems, and pose a risk to both aquatic life and humans. Therefore, it is crucial to handle and dispose of toxic waste properly through specialized methods to prevent any negative impacts on the environment and public health.

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  • 40. 

    A male thread fitting with square head used for closing another female fitting

    • Nipple

    • Cap

    • Bushing

    • Plug

    Correct Answer
    A. Plug
    Explanation
    A plug is a male thread fitting with a square head that is used for closing another female fitting. It is designed to fit securely into the female fitting, creating a tight seal and preventing any leakage or flow. Plugs are commonly used in plumbing and piping systems to close off unused or temporary connections. They are easy to install and remove, making them a convenient option for closing off fittings when needed.

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  • 41. 

    Which of the following is not a sanitary drainage fitting?

    • Wye branch

    • Nipple

    • Tapped tee

    • Upright wye

    Correct Answer
    A. Nipple
    Explanation
    A nipple is not a sanitary drainage fitting because it is a short piece of pipe with male threads on both ends, used to connect two female threaded fittings. Sanitary drainage fittings are specifically designed to facilitate the proper flow and disposal of waste and wastewater in plumbing systems. Examples of sanitary drainage fittings include wye branches, tapped tees, and upright wyes, which are all specifically designed to connect and direct the flow of waste in a sanitary manner. A nipple, on the other hand, is primarily used for connecting and extending pipe lengths, rather than for sanitary drainage purposes.

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  • 42. 

    Wastewater flushed out of water closet or urinal is known ___________.

    • Grey water

    • White water

    • Black water

    • Storm water

    Correct Answer
    A. Black water
    Explanation
    The wastewater flushed out of a water closet or urinal is known as black water. This term is used to refer to wastewater that contains fecal matter and is highly contaminated. Black water is typically treated separately from other types of wastewater due to its high level of pollutants and potential health risks.

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  • 43. 

    A tool used to make watertight joints between flexible copper tubing and fitting or valve.

    • Flaring tool

    • Pipe vise

    • Yoke vise

    • Pipe extractor

    Correct Answer
    A. Flaring tool
    Explanation
    A flaring tool is used to create watertight joints between flexible copper tubing and fittings or valves. This tool is specifically designed to flare the end of the tubing, creating a wider opening that can be connected securely to the fitting or valve. The flaring process ensures a tight seal, preventing any leaks or water damage.

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  • 44. 

    What is the minimum size of water supply inlet for a shower stall?

    • 1/4"

    • 3/2"

    • 1/2"

    • 3/8"

    Correct Answer
    A. 1/2"
    Explanation
    The minimum size of water supply inlet for a shower stall is 1/2". This is because a larger size, such as 3/2" or 1/4", would result in too much water pressure and flow, which could be uncomfortable or even dangerous. On the other hand, a smaller size, like 3/8", may not provide enough water pressure for a satisfying shower experience. Therefore, 1/2" is the appropriate size for a water supply inlet for a shower stall.

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  • 45. 

    Gases not found in sewer air of septic tanks

    • Methane gas

    • Carbon monoxide

    • Ammonia

    • Chloride

    Correct Answer
    A. Chloride
    Explanation
    Chloride gas is not found in sewer air of septic tanks. Chloride is a negatively charged ion that is commonly found in salts, such as sodium chloride (table salt). It is not typically present in gaseous form in sewer air. On the other hand, carbon monoxide, ammonia, and methane gas can be found in sewer air due to various biological and chemical processes.

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  • 46. 

    The following are examples of sanitary wares EXCEPT __________.

    • Kitchen sink

    • Bathtub

    • Urinal

    • Water closet

    Correct Answer
    A. Kitchen sink
    Explanation
    Sanitary wares refer to plumbing fixtures that are used for sanitation purposes. A kitchen sink is not considered a sanitary ware because it is primarily used for washing dishes and food preparation, rather than for personal hygiene or waste disposal. On the other hand, a bathtub, urinal, and water closet (toilet) are all examples of sanitary wares as they are designed for bathing, urination, and defecation respectively.

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  • 47. 

    What is the volume of swimming pool with the following dimensions : depth = 5 ft, width=50 ft. and length = 100 ft?

    • 187,000 gals

    • 120,000 gals

    • 105,000 gals

    • 169,000 gals

    Correct Answer
    A. 187,000 gals
    Explanation
    The volume of a rectangular swimming pool can be calculated by multiplying its length, width, and depth. In this case, the length is 100 ft, the width is 50 ft, and the depth is 5 ft. So, the volume of the swimming pool is 100 ft * 50 ft * 5 ft = 25000 cubic ft. To convert this volume into gallons, we need to multiply it by 7.48 (since 1 cubic ft is approximately equal to 7.48 gallons). Therefore, the volume of the swimming pool is 25000 cubic ft * 7.48 gallons/cubic ft = 187,000 gals.

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  • 48. 

    What is the correct order of valves or devices in a water service and building supply system from the water main?

    • Check valve, gate valve, water meter

    • Water meter, check valve, gate valve

    • Gate valve, check valve, water meter

    • Gate valve, water meter, check valve

    Correct Answer
    A. Gate valve, water meter, check valve
    Explanation
    In a water service and building supply system, the correct order of valves or devices from the water main is gate valve, water meter, check valve. The gate valve is typically the first valve in the system, allowing for the control of water flow. The water meter is then installed to measure the amount of water being used. Finally, the check valve is placed to prevent the backflow of water, ensuring that water only flows in one direction.

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  • 49. 

    What is the minimum size of water supply inlet for the kitchen sink?

    • 1/4"

    • 3/2"

    • 1/2"

    • 3/8"

    Correct Answer
    A. 1/2"
    Explanation
    The minimum size of water supply inlet for a kitchen sink is 1/2". This is because a larger size is needed to provide enough water flow for tasks such as washing dishes and filling pots. A smaller size, such as 1/4" or 3/8", would restrict the water flow and make it difficult to use the sink effectively. The option of 3/2" is not a standard size and is not commonly used for water supply inlets.

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  • Sep 01, 2024
    Quiz Edited by
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  • Jan 16, 2017
    Quiz Created by
    Grazel Marcos
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