The Ultimate Basic Plumbing! Trivia Quiz

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1. What is use for water treatment in a swimming pool?

Explanation

Chloride is used for water treatment in a swimming pool. It helps to sanitize the water by killing bacteria and other microorganisms. Chloride compounds, such as calcium chloride or sodium chloride, are commonly used as disinfectants in pools. These compounds release chlorine when dissolved in water, which acts as a powerful disinfectant. Chlorine helps to kill harmful bacteria and viruses, keeping the water clean and safe for swimmers. Additionally, chloride also helps to balance the pH levels in the pool water, ensuring optimal conditions for swimming.

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About This Quiz
The Ultimate Basic Plumbing! Trivia Quiz - Quiz

The Ultimate Basic Plumbing! Trivia Quiz assesses foundational knowledge in plumbing, focusing on pipe usage, drainage design, and storm drainage systems. It's ideal for learners aiming to understand... see morebasic plumbing principles and practices. see less

2. What is the typical slope of a waste pipe?

Explanation

The typical slope of a waste pipe is 2%. This means that for every 100 units of horizontal distance, the waste pipe will have a vertical drop of 2 units. This slope is necessary to ensure that waste and water flow efficiently through the pipe, preventing clogs and backups. A steeper slope could cause excessive water velocity and potential damage to the pipe, while a shallower slope could result in sluggish flow and accumulation of waste. Therefore, a 2% slope strikes a balance between efficient drainage and pipe integrity.

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3. This material is used in threaded pipe connections to prevent leakage

Explanation

Teflon is a material known for its nonstick properties and resistance to chemicals. It is commonly used in threaded pipe connections to prevent leakage because it forms a tight seal and prevents any fluid or gas from escaping. Teflon's low coefficient of friction also makes it easy to tighten and loosen the connections without causing damage or leaks. Therefore, it is an effective choice for preventing leakage in threaded pipe connections.

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4. Where should you place soil-pipes for high-rise structures?

Explanation

In high-rise structures, soil-pipes should be placed in a pipe chase. A pipe chase is a dedicated vertical or horizontal space within the building that is specifically designed to accommodate the soil-pipes. This arrangement allows for easy access, maintenance, and repair of the pipes without the need to disturb other structural elements such as partitions, RC walls, or columns. Placing the soil-pipes in a pipe chase ensures efficient functioning of the plumbing system while minimizing disruptions to the overall structure of the building.

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5. In the figure above, which is a reducing socket?

Explanation

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6. What is installed in a fixture to alleviate the effects of too much water pressure?

Explanation

A water pressure regulator is installed in a fixture to alleviate the effects of too much water pressure. It helps to control and reduce the pressure of the incoming water supply, ensuring that it is at a safe and manageable level. This is important because excessive water pressure can cause damage to pipes, fixtures, and appliances, leading to leaks, bursts, and other plumbing issues. By installing a water pressure regulator, the pressure is regulated and maintained within a safe range, preventing potential damage and prolonging the lifespan of the plumbing system.

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7. In plumbing system, if pipes are electrical wires, what are the equivalent of switches?

Explanation

In a plumbing system, valves are the equivalent of switches. Valves control the flow of water or other fluids through pipes, just like switches control the flow of electricity through electrical wires. Valves can be opened or closed to allow or stop the flow of water, similar to how switches can be turned on or off to allow or stop the flow of electricity. Therefore, valves serve as the equivalent of switches in a plumbing system.

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8. A pipe fitting to join two straight lengths of pipes?

Explanation

A coupling is a pipe fitting used to join two straight lengths of pipes. It is typically a short piece of pipe with female threads on both ends, allowing it to be screwed onto the ends of the pipes and create a secure connection. Couplings are commonly used in plumbing and other applications where pipes need to be joined together in a straight line. They provide a reliable and leak-proof connection between the pipes, ensuring the smooth flow of fluids or gases.

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9. Best for sanitary pipes?

Explanation

uPVC (unplasticized polyvinyl chloride) is the best material for sanitary pipes due to its various advantages. It is resistant to corrosion, chemicals, and UV rays, making it suitable for long-term use. uPVC pipes have a smooth inner surface, which prevents the accumulation of debris and inhibits the growth of bacteria. They are lightweight, easy to install, and have a high impact strength. Additionally, uPVC pipes have good thermal insulation properties and are cost-effective. Therefore, uPVC is the ideal choice for sanitary pipes.

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10. What is used to shut off flow of water during maintenance?

Explanation

A gate valve is used to shut off the flow of water during maintenance. Unlike other valves, a gate valve has a gate-like disc that moves up and down to control the flow. When the gate is fully lowered, it blocks the passage of water, effectively shutting off the flow. This makes gate valves ideal for applications where a complete shut-off is required, such as during maintenance or repairs.

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11. An elbow having lugs for attachment to wall or joist?

Explanation

This answer suggests that X11.2 is the correct option for an elbow that has lugs for attachment to a wall or joist.

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12. What type of pipe is not recommended for water line?

Explanation

Lead is not recommended for water lines because it can contaminate the water and pose health risks. Lead pipes can leach lead particles into the water, especially when the water is acidic or has been sitting in the pipes for a long time. Lead exposure can lead to various health problems, particularly in children, including developmental delays, learning difficulties, and damage to the brain and nervous system. Therefore, using lead pipes for water lines is not recommended.

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13. In the figure above, which is a flange adaptor?

Explanation

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14. What is the color coding of pipes for potable water?

Explanation

The color coding for pipes used for potable water is blue. This is a universally recognized standard that helps to easily identify the type of water being transported through the pipes. Blue color coding is specifically used for potable water to ensure that it is not confused with other types of water or substances.

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15. One of the first steps in the selection of a suitable water supply source is?

Explanation

The correct answer is water (potability). When selecting a water supply source, it is crucial to consider the potability of the water. This refers to the quality and safety of the water for human consumption. It is important to ensure that the water source meets the necessary standards and does not pose any health risks. This step is essential in order to provide a safe and reliable water supply to the community or users.

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16. There is a septic tank installed on top of a rock by seashore. The tank is exposed on low tide and covered in sea water during high tide. Which of the following would be an appropriate water proofing for it?

Explanation

To ensure that the septic tank remains protected from water damage during high tide, it is necessary to waterproof all surfaces of the tank. This includes both the interior and exterior surfaces, including the floor and the ceiling. Waterproofing all surfaces will prevent any water from seeping into the tank and causing damage to its structure or contents.

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17. The minimum distance (in meters) of a well from a septic tank?

Explanation

The minimum distance of a well from a septic tank is 15 meters. This is likely because septic tanks contain waste and harmful bacteria that can contaminate the water in the well if they are too close together. Therefore, it is important to maintain a safe distance to ensure the well water remains clean and safe for consumption.

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18. A pipe fitting having a large radius of curvature?

Explanation

X11.3 is the correct answer because a pipe fitting with a large radius of curvature is designed to allow for smoother flow of fluid or gas through the pipe. A larger radius of curvature reduces the amount of friction and turbulence in the flow, resulting in less energy loss and improved efficiency. This type of fitting is commonly used in applications where a high flow rate or low pressure drop is desired.

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19. Plumbing permit shall be invalid if work has not commenced after a period of?

Explanation

A plumbing permit is typically issued for a specific period of time during which the work is expected to commence and be completed. If the work has not commenced after a certain period, the permit becomes invalid. In this case, the correct answer is "1 year," indicating that if the plumbing work has not started within a year of obtaining the permit, the permit will be considered invalid.

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20. A pipe fitting to change in one single direction (course) the flow of water:

Explanation

An elbow is a pipe fitting that is used to change the direction of the flow of water in a single course. It is typically a curved fitting that connects two pipes at an angle, allowing the water to change its direction smoothly. Unlike a tee or a cross tee, which allows flow in multiple directions, an elbow specifically directs the flow in one direction. Therefore, an elbow is the correct answer for a pipe fitting that changes the flow direction in one single course.

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21. What is the best fixture for a public comfort room?

Explanation

A flushometer is the best fixture for a public comfort room because it is designed specifically for high-traffic areas. It is a valve that controls the flow of water to flush a toilet or urinal, ensuring a powerful and efficient flush every time. Unlike a faucet or gate valve, a flushometer is specifically designed for toilets and urinals, making it the most suitable choice for a public comfort room.

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22.  A pipe which conveys only liquid waste, free of fecal matter?

Explanation

A waste pipe is a pipe that is specifically designed to carry liquid waste, which is free of fecal matter. It is used to transport waste water from sinks, showers, and other fixtures to the sewer or septic system. Unlike a soil pipe, which carries both liquid and solid waste including fecal matter, a waste pipe only carries liquid waste. Therefore, a waste pipe is the correct answer for this question.

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23. What type of materials is used for the base of a septic tank?

Explanation

Reinforced concrete is the correct answer for the base of a septic tank. This is because septic tanks require a strong and durable material to withstand the weight and pressure of the wastewater and solids that accumulate in the tank. Reinforced concrete provides the necessary strength and stability, as it is a composite material that combines the strength of concrete with the added reinforcement of steel bars or mesh. This ensures that the base of the septic tank can support the weight and prevent any leakage or damage over time.

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24.  Theater or movie house's water requirement is determined or estimated at 5 galloons of water per day for?

Explanation

The water requirement for a theater or movie house is determined by the total number of auditorium seats. This is because each seat requires a certain amount of water for cleaning and maintenance purposes. The more seats there are, the higher the water requirement will be. The other options, such as the number of movie goers per day, the floor area space of the auditorium, and the box office record, may be factors that influence the overall water consumption but they do not directly determine the water requirement.

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25. What do you call a water-tight receptacle used to store household waste?

Explanation

A septic vault is a water-tight receptacle used to store household waste. It is designed to separate solid waste from liquid waste and allow the liquid waste to drain into the ground while retaining the solid waste. This helps in the proper disposal and treatment of waste, preventing contamination of groundwater and the surrounding environment. A pit, STP (sewage treatment plant), and house drain are not specifically designed for storing household waste in a water-tight manner.

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26. A toilet bowl in which the flushing water enters through the rim and sipping action ignited by a water jet draws the contents of the bowl through the tramway?

Explanation

A toilet bowl with a siphon jet design has the flushing water entering through the rim and a water jet ignites a sipping action. This sipping action creates a suction force that draws the contents of the bowl through the tramway and into the drainage system. The siphon jet design is efficient in removing waste and preventing clogs, making it a common choice for toilets.

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27. What do you call a liquid waste ( without urine/ industrial waste) discharges into the sewer?

Explanation

Gray water refers to the liquid waste that is discharged into the sewer system, excluding urine and industrial waste. It typically includes water from household activities such as washing dishes, laundry, and bathing. This term is used to differentiate it from black water, which contains human waste, and storm water, which refers to rainwater or melted snow that flows over surfaces. Ground water, on the other hand, is water that is stored beneath the Earth's surface.

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28. The minimum size of a trap and waste branch for a shower stall?

Explanation

The minimum size of a trap and waste branch for a shower stall is 2 diameter. This means that the diameter of the trap and waste branch should be at least 2 units in size. This is important for proper drainage and to prevent clogging in the shower stall. A larger diameter allows for better flow of water and waste, reducing the chances of blockages and ensuring efficient drainage.

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29. Opening use to received pipes?

Explanation

A pipe chase is a vertical shaft that is used to house and conceal pipes. It provides a dedicated space for the installation, maintenance, and repair of pipes. This term is commonly used in construction and building design, where it is important to have a designated area for the organization and protection of pipes.

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30. Standard Water pressure from NAWASA?

Explanation

The correct answer is 60psi. This indicates that the standard water pressure from NAWASA is 60 pounds per square inch. Water pressure is a measure of the force that pushes water through pipes and into homes or buildings. A higher water pressure can result in stronger water flow, while a lower water pressure may lead to weaker flow. In this case, NAWASA maintains a water pressure of 60psi, ensuring a satisfactory water flow for its customers.

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31. Valve permitting a gas or liquid to flow in 1 direction?

Explanation

A check valve is designed to permit the flow of gas or liquid in only one direction. It allows the fluid to pass through in the desired direction, but prevents it from flowing back in the opposite direction. This is achieved through the use of a one-way valve mechanism, which opens when the pressure on the inlet side is greater than the outlet side, and closes when the pressure on the outlet side is higher. Therefore, a check valve is the correct answer for a valve that permits flow in only one direction.

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32. In a location where there is no provision for drainage line, what is the next best thing?

Explanation

When there is no provision for a drainage line, the next best thing would be to store waste in a tank and dispose of it in a sanitary fill. This method ensures that the waste is contained and properly disposed of in a designated area, preventing any contamination or harm to the environment. Using drain tiles connected to an open field or connecting to the nearest creek may not be feasible or environmentally friendly in this situation.

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33. A sewage treatment that includes the exposure to air?

Explanation

An aerator is a device used in sewage treatment that exposes the wastewater to air. This exposure helps in the breakdown of organic matter and the removal of contaminants through natural processes. The aerator promotes the growth of aerobic bacteria, which consume the organic matter and convert it into carbon dioxide and water. This process improves the quality of the wastewater before it is discharged back into the environment.

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34. Black steel pipe with galvanized malleable fitting is ideal for?

Explanation

Black steel pipe with galvanized malleable fitting is ideal for gas pipe because galvanized malleable fittings provide a strong and durable connection, which is crucial for transporting gas safely. Additionally, black steel pipe is resistant to corrosion and can withstand high pressure, making it suitable for gas distribution systems.

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35. In storm drainage system, it is used to prevent aggregates, debris and other unwanted objects from entering the drainage system?

Explanation

A catch basin is a component of a storm drainage system that is designed to prevent aggregates, debris, and other unwanted objects from entering the drainage system. It is essentially a large container with a grate on top that allows water to enter while trapping larger objects. This helps to prevent clogging and blockages in the drainage system, allowing for proper water flow and preventing damage or flooding.

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36. Where traps are used to prevent foul odor from coming out. Which of the following does not have a water trap?

Explanation

A water trap, also known as a P-trap, is a curved pipe that is filled with water to prevent foul odors from coming back up through the plumbing system. It works by creating a barrier of water that blocks the flow of gases and odors. In this case, all of the options listed have water traps except for the bidet. A bidet is a bathroom fixture used for personal hygiene, and it typically does not have a water trap because it does not require one to prevent foul odors.

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37. The quality of Galvanized Iron pipes are rated by?

Explanation

Galvanized Iron pipes are rated by their schedule, which refers to the thickness of the pipe walls. The schedule number indicates the pressure rating and strength of the pipe. A higher schedule number means a thicker pipe wall, indicating that it can withstand higher pressure and is more durable. Therefore, the schedule is used to determine the quality and suitability of Galvanized Iron pipes for various applications.

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38. A piece of pipe threaded outside all through out to connect short runs of two pipe fittings?

Explanation

A nipple is a piece of pipe that is threaded on both ends, allowing it to be used to connect two pipe fittings. It is typically used to create a short run between two fittings, providing a secure and leak-proof connection. In this scenario, the nipple would be the correct answer as it is specifically designed for connecting short runs of pipe fittings.

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39. Minimum size of trap of shower drain?

Explanation

The minimum size of the trap for a shower drain is 2 inches. This is because a trap is a curved pipe that retains a small amount of water, which prevents sewer gases from entering the bathroom. A 2-inch trap is the standard size for most shower drains and is sufficient to trap debris and prevent clogging. A smaller trap size may not effectively trap debris, leading to potential blockages in the drain.

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40. Best location to put the soil pipes?

Explanation

The best location to put the soil pipes is in a pipe chase. A pipe chase is a dedicated space or enclosure specifically designed to house pipes, providing easy access for maintenance and repairs. Placing the soil pipes in a pipe chase ensures that they are concealed and protected, while also allowing for easy access when needed. This helps to maintain the aesthetics of the space while ensuring the functionality and longevity of the plumbing system.

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41. What property is used to distinguish between potable and sanitary uPVC pipes?

Explanation

The property used to distinguish between potable and sanitary uPVC pipes is color. The color of the pipes helps to identify their specific use and application. Potable uPVC pipes, which are used for carrying drinking water, are typically blue in color. On the other hand, sanitary uPVC pipes, which are used for carrying wastewater and sewage, are usually green or gray in color. This color coding system helps in differentiating between the two types of pipes and ensures that they are correctly installed and used for their intended purpose.

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42. Where is water meter located?

Explanation

The water meter is located right after the main distribution line connection. This is because the water meter is used to measure the amount of water that is being distributed to a property. By placing it right after the main distribution line connection, it allows for an accurate measurement of the water being supplied to the property.

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43.  Women's urinal fixture?

Explanation

The correct answer is "Bidet." A bidet is a fixture that is used for personal hygiene after using the toilet. It is commonly found in bathrooms and is used to wash the genital area. The other options mentioned, such as "washdown," "flatback," and "feminine stall urinal," do not accurately describe a bidet.

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44. A tee having a slight curve in 90degree bend transition to channel the flow from a branch pipe in the direction of the main?

Explanation

This answer, X11.6, is correct because it describes a tee fitting that has a slight curve in the 90-degree bend transition. This curved design allows the flow from a branch pipe to be channeled in the direction of the main pipe. The other answer options do not mention this specific design feature, making X11.6 the most suitable choice.

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45. The part of a vent line which connects directly with an individual trap underneath or behind the fixture and extends to the branch or man pipe at any point higher than the fixture trap?

Explanation

The correct answer is "Back vent pipe." This is the part of a vent line that connects directly with an individual trap underneath or behind the fixture and extends to the branch or main pipe at any point higher than the fixture trap. It is used to provide proper venting and prevent the trap from being siphoned or losing its seal.

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46. The minimum number of water closet unit required for the female population of an elementary school?

Explanation

The correct answer is 1 per 35. This means that for every 35 females in the elementary school, there should be at least one water closet unit available. This ensures that there are enough restroom facilities for the female population, taking into consideration their needs and convenience.

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47. What should not be permitted to cross a beam?

Explanation

Soil pipes should not be permitted to cross a beam because they can cause structural issues. Soil pipes are used for waste disposal and can carry heavy loads of water and waste. Crossing a beam can put excessive weight on the beam and potentially cause it to weaken or fail. It is important to ensure that any pipes crossing beams are properly supported to avoid any structural damage.

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48. What is used in water pipelines to absorb the shock caused by water hammering?

Explanation

An air chamber is used in water pipelines to absorb the shock caused by water hammering. Water hammering occurs when the flow of water is suddenly stopped or changed direction, causing a sudden increase in pressure. The air chamber acts as a cushion, absorbing the shock and preventing damage to the pipes and fittings. When water hammering occurs, the excess pressure is absorbed by the air in the chamber, reducing the impact and preventing the pipes from banging or vibrating. This helps to maintain the integrity and longevity of the water pipeline system.

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49. A general term used for any vertical line of soil, waste, or vent piping?

Explanation

The term "stack" is commonly used to refer to any vertical line of soil, waste, or vent piping. It is a general term that encompasses all types of vertical piping systems in plumbing. The other options, such as stand pipe, riser, and shaft, may have specific meanings or uses in plumbing, but they do not encompass the broad range of vertical piping as the term "stack" does.

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50. The minimum sized of a trap and waste branch for a pedestal urinal?

Explanation

The minimum size of a trap and waste branch for a pedestal urinal is 2 diameter. This means that the trap and waste branch should have a diameter of 2 inches. A trap and waste branch is a plumbing component that is responsible for collecting waste and preventing foul odors from entering the restroom. In the case of a pedestal urinal, a 2-inch diameter trap and waste branch would be sufficient for proper waste disposal and drainage.

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51. A pipe that conveys the discharge of water closets or fixtures having similar functions with or without the discharges from other fixtures?

Explanation

A soil pipe is a pipe that carries the discharge of water closets or fixtures with similar functions, either on its own or combined with the discharges from other fixtures. It is specifically designed to handle the solid waste and sewage from these fixtures, making it the correct answer in this case.

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52. What is the minimum trap seal?

Explanation

The minimum trap seal is 2". This refers to the amount of water that remains in a plumbing trap to prevent sewer gases from entering the building. A trap seal is necessary to create a barrier between the plumbing system and the living or working space. A 2" trap seal is the minimum requirement to ensure proper functioning and prevent the escape of unpleasant odors.

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53. Which wall is best suited if soil pipe will run through it?

Explanation

A 6" CHB (Concrete Hollow Blocks) wall is best suited if a soil pipe will run through it. This is because CHB walls are strong and durable, making them capable of supporting the weight and pressure of a soil pipe. The hollow blocks also provide space for the pipe to pass through without compromising the integrity of the wall. Drywall, shear walls, and retaining walls may not be as suitable for this purpose due to their different construction materials and design purposes.

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54. What is the principle of governing the size of pipes in designing plumbing systems?

Explanation

The principle governing the size of pipes in designing plumbing systems is that the bigger the pipes diameter, the lesser the pressure; the smaller the pipes diameter, the greater the pressure. This means that larger diameter pipes allow for a higher flow rate but at a lower pressure, while smaller diameter pipes result in a lower flow rate but at a higher pressure. This principle is important in determining the appropriate pipe size to ensure efficient water distribution and pressure regulation in plumbing systems.

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55. Kind of pipe not suited to be exposed to ultraviolet rays?

Explanation

PVC (Polyvinyl chloride) is not suited to be exposed to ultraviolet rays because it is not UV resistant. When PVC is exposed to sunlight or other sources of UV radiation, it can degrade and become brittle over time. This can lead to cracks, leaks, and other structural issues in the pipe. On the other hand, PB (Polybutylene), iron, and GI (Galvanized Iron) pipes are not affected by UV rays and can be used in outdoor applications without any issues.

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56. During the site inspection, the architect notices that a soil pipe will cross a beam, whats the best advice he can do?

Explanation

The best advice in this situation would be to simply ask to relocate the soil pipe. This is because the architect has noticed that the pipe will cross a beam, which could potentially cause damage or structural issues. By asking to relocate the pipe, the architect can ensure that the integrity of the beam and overall structure is not compromised.

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57. What can be discharge directly to sewer system?

Explanation

Building sewer can be discharged directly to the sewer system because it is designed to carry wastewater from a building to the public sewer system. It is specifically built to handle the discharge of domestic wastewater, including water from toilets, sinks, showers, and laundry. Unlike stormwater, which contains pollutants and contaminants from rainwater runoff, building sewer is meant to transport only wastewater that has been treated or is suitable for treatment in the public sewer system. Therefore, building sewer is an acceptable discharge to the sewer system.

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58. What is the maximum depth of septic tank?

Explanation

The maximum depth of a septic tank is typically 1.80 m. This depth allows for adequate storage and settling of solid waste, as well as proper separation of liquids. It is important to have a sufficient depth to ensure proper functioning of the septic tank system and to prevent any overflow or leakage.

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59. According to NBC, pipe support should be every,

Explanation

According to NBC (National Building Code), pipe support should be placed every 3 meters. This means that at every 3-meter interval, there should be a support system in place to hold and secure the pipes. This is important to ensure the stability and integrity of the pipes, preventing any potential damage or failure due to excessive weight or stress. Proper pipe support is crucial for the safe and efficient functioning of plumbing systems.

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60. A tee shaped pipe fitting for making a three-way joint?

Explanation

The correct answer is X11.4 because a tee-shaped pipe fitting is specifically designed for making a three-way joint. The tee fitting has one inlet and two outlets, allowing for the connection of three pipes at a right angle. This type of fitting is commonly used in plumbing and piping systems to divert or combine flow in multiple directions.

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61. How could you differentiate between a soil and waste pipe when laid side by side?

Explanation

You can differentiate between a soil and waste pipe when laid side by side by looking at their diameter. The diameter of a soil pipe is typically larger than that of a waste pipe. Soil pipes are responsible for carrying human waste and are therefore larger in diameter to accommodate the flow. On the other hand, waste pipes are used for carrying non-human waste and are generally smaller in diameter. By comparing the sizes of the pipes, you can determine whether they are soil or waste pipes.

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62. How do you connect PPRC?

Explanation

PPRC (Polypropylene Random Copolymer) is a type of plastic pipe used for plumbing and water supply systems. Fusion welding is the correct method to connect PPRC pipes. Fusion welding involves heating the ends of the pipes and then pressing them together to create a strong and leak-proof joint. This method ensures a secure and durable connection between PPRC pipes, making it the most suitable option for joining them. Mechanical fasteners and couplings may not provide the same level of strength and reliability as fusion welding. Solvent is not used in the connection of PPRC pipes.

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63. Can you embed a 4" diameter pipe in a 150 wall?

Explanation

It is not possible to embed a 4" diameter pipe in a 150 wall because the diameter of the pipe is larger than the thickness of the wall.

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64. Should not be used for a pipe chase?

Explanation

Drywall should not be used for a pipe chase because it is not a suitable material for enclosing or protecting pipes. Drywall is primarily used as a surface material for interior walls and ceilings, providing a smooth and finished appearance. It is not designed to withstand the pressure, moisture, and potential damage that can occur in a pipe chase. Instead, materials such as metal or plastic pipes or conduits should be used to enclose and protect pipes in a chase.

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65. Base on the figure above, which of the following is a 1/8 bend fitting?

Explanation

Based on the figure above, option b is a 1/8 bend fitting. This is because it resembles a curved pipe with a 45-degree angle, which is characteristic of a 1/8 bend fitting. Option a is a straight pipe, option d is a 90-degree elbow fitting, and option c is a T-shaped fitting, so they are not 1/8 bend fittings.

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66. Base on the figure above, which of the following is a 1/4 bend fitting?

Explanation

Based on the figure, option a is a 1/4 bend fitting. This is because option a shows a curved pipe that bends at a 90-degree angle, forming a quarter of a complete circle. The other options do not show a similar bend or curve, making them incorrect choices for a 1/4 bend fitting.

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67. A faucet fitted with nozzle curving downward used as a draw-of trap?

Explanation

A lavatory faucet is a type of faucet that is commonly used in bathrooms. It is fitted with a nozzle that curves downward, which helps to prevent water from splashing out of the sink. This design makes it suitable for use as a draw-off trap, as it allows water to be easily directed into a container or drain without causing any mess or wastage.

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68. When water goes up through a vertical pipe, it stops at a certain height. Why?

Explanation

The correct answer is that the pressure inside the pipe equates to the pressure outside the pipe causing the water to stop at that point where it appears. This is because when water flows up a vertical pipe, it experiences a decrease in pressure due to the decrease in height. However, as the water rises, the pressure outside the pipe also increases, eventually reaching a point where the pressure inside and outside the pipe are equal. At this point, the forces of gravity and friction are balanced by the pressure, causing the water to stop rising.

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69. Where would you locate  water distribution pipe farthest from?

Explanation

Large trees can have extensive root systems that can potentially damage water distribution pipes. Therefore, locating the water distribution pipe farthest from large trees would minimize the risk of damage and ensure the longevity and efficiency of the pipe system.

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70. A plumbing devices designed to intercept most greases and solids before they enter a wastewater disposal system. Except for one;

Explanation

Trap seal is the correct answer because it refers to a plumbing device that prevents sewer gases from entering a building by maintaining a water barrier in the plumbing trap. It does not intercept greases and solids like grease interceptors, grease recovery devices, and grease converters do.

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71. The minimum sized of a trap and waste branch for a size of foot bath?

Explanation

The correct answer is 2 diameter because the trap and waste branch for a foot bath should be at least twice the diameter of the drain pipe to ensure proper drainage and prevent clogging.

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72. An individual vent for a plumbing fixture  located at the downstream of a trap?

Explanation

A back vent is an individual vent for a plumbing fixture located downstream of a trap. It is designed to provide ventilation to the fixture, allowing for proper drainage and preventing the trap from being siphoned. This type of vent is typically used when it is not possible to install a traditional vent pipe or vent through the roof.

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73. Which is not a rule of a thumb when designing a drainage?

Explanation

When designing a drainage system, it is not a rule of thumb for the pipes to be underneath the driveway. This is because having the pipes underneath the driveway can make them difficult to access and maintain in case of any issues. It is generally recommended to avoid placing drainage pipes under areas with heavy traffic or load-bearing structures like driveways to ensure easy accessibility and prevent any potential damage to the pipes.

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74. A cross fitting having a slight curve in each of the 90degree transition to channel the flow from branch pipes in the direction of the main?

Explanation

A cross fitting with a slight curve in each of the 90-degree transitions is designed to channel the flow from the branch pipes towards the main pipe. This curved design helps to reduce turbulence and pressure drop in the flow, ensuring smooth and efficient flow through the fitting. The other options do not mention this specific curved design, making X11.8 the most suitable choice.

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75. Where will you least place a downspout?

Explanation

The least ideal place to put a downspout would be in between window openings. This is because the downspout would obstruct the view from the window and potentially cause water to splash onto the window during heavy rainfall. Placing the downspout at the corner of walls, inside columns, or wall hung would be more suitable locations that do not interfere with the functionality of the window.

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76. What is the color of pipes for steam?

Explanation

The color of pipes for steam is white. This is because white pipes are used to indicate that they are carrying steam. The color coding of pipes is an important safety measure in industries to ensure that workers can easily identify the contents of the pipes and take appropriate precautions. White is specifically used for steam pipes to distinguish them from other types of pipes and prevent any confusion or accidents.

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77. Where are storm sewer usually placed?

Explanation

Storm sewers are usually placed near the curb. This is because stormwater runoff, which includes rainwater and melted snow, flows along the curb and into the storm sewer system. Placing the storm sewers near the curb allows for efficient collection and drainage of the stormwater, preventing flooding and water damage on the roads and sidewalks.

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78. What is the standard water consumption (gallon/ person/day) used in a 2 story residence?

Explanation

The standard water consumption in a 2 story residence is typically around 30-40 gallons per person per day. This range takes into account the average water usage for daily activities such as drinking, cooking, cleaning, and bathing. It is important to note that individual water usage may vary depending on factors such as lifestyle, habits, and water conservation practices.

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79. When there is a low pressure from the water main, what will you use to supply higher levels?

Explanation

A booster pump is used to supply higher levels when there is low pressure from the water main. It is specifically designed to increase the pressure of water in a system, allowing it to be distributed to higher levels or areas that require greater pressure. Unlike other types of pumps mentioned, such as a pneumatic pump, sump pump, or jet pump, a booster pump is specifically designed for this purpose, making it the correct choice in this scenario.

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80. What is the most efficient tools for cutting cast iron pipe?

Explanation

A snap cutter is the most efficient tool for cutting cast iron pipe because it is specifically designed for this purpose. It has a chain with cutting wheels that can easily cut through the tough material of the cast iron pipe. This tool provides a clean and precise cut without much effort, making it the preferred choice for professionals working with cast iron pipes.

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81. A term used to describe pumps that are interconnected with each other?

Explanation

The term "battery" is used to describe pumps that are interconnected with each other. This term is commonly used in situations where multiple pumps are connected in a parallel arrangement to work together and provide a higher flow rate or increased pressure. The pumps in a battery arrangement work in coordination to achieve the desired pumping outcome.

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82. The minimum size of trap and waste branch for a bidet?

Explanation

Plumbing codes and standards typically specify that the minimum trap size for a bidet should be 1-1/2 inches in diameter to ensure proper drainage and to prevent clogs. This size is adequate for the volume of water typically used by a bidet. It is important to follow local plumbing codes and guidelines when installing plumbing fixtures.

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83. Allowable slope of sanitary sewer?

Explanation

The allowable slope of a sanitary sewer is 1/4 of 1 ft. This means that for every 1 ft of horizontal distance, the sewer can have a vertical drop of 1/4 ft. This slope is necessary to ensure proper flow and prevent blockages in the sewer system. A steeper slope would cause the sewage to flow too quickly, potentially causing damage or blockages, while a shallower slope would result in slower flow and increased risk of clogs. Therefore, a slope of 1/4 of 1 ft is the ideal balance for efficient and effective sewage flow.

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84. Level 3 types of water service refers to?

Explanation

Level 3 types of water service refers to an artesian well. This means that the water service is provided by a well that taps into a confined aquifer, where water is under pressure and rises to the surface without the need for pumping. This type of water service is typically more reliable and can provide a higher volume of water compared to other options such as individual shallow well hand pump installations, public faucets, or individual house pipes connected to a meter.

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85. Alternative to the conventional septic tank?

Explanation

An aerobic treatment system is a viable alternative to the conventional septic tank. Unlike septic tanks that rely on anaerobic bacteria to break down waste, aerobic treatment systems use oxygen to facilitate the decomposition process. This results in more efficient and effective treatment of wastewater, producing cleaner effluent. Additionally, aerobic treatment systems have a smaller footprint compared to septic tanks, making them suitable for areas with limited space. They also require less maintenance and have a longer lifespan. Overall, aerobic treatment systems offer a more environmentally-friendly and sustainable solution for wastewater treatment.

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86. A pump used to eject sewage or liquid waste?central sewage booster

Explanation

The pump that is specifically designed to eject sewage or liquid waste is called a "sewage ejector pump" or a "sewage pump." This type of pump is typically used in residential or commercial buildings where the sewage needs to be pumped from a lower level to a higher level, such as when the sewage system is located below the main sewer line. Sewage ejector pumps are powerful and durable, capable of handling solid waste and wastewater. They are commonly installed in basements or below-grade areas where gravity cannot effectively drain the waste. These pumps help to prevent flooding and ensure that waste is properly transported to the sewer system or a septic tank. While "central sewage booster" may refer to a larger system or a group of pumps that work together to boost the flow of sewage in a municipal or industrial setting, the specific pump used to eject sewage or liquid waste is called a sewage ejector pump or sewage pump.

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87. What do you call a control valve used to shut off at the water supply to a building in case of emergency. It is installed at a water service pipe and operated by means of long key inserted through a curb box?

Explanation

A corp stop is a control valve that is used to shut off the water supply to a building in case of an emergency. It is installed at a water service pipe and can be operated by inserting a long key through a curb box.

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88. It is the line in a single diagram that runs from the fuses to the home run?

Explanation

The riser is the line in a single diagram that runs from the fuses to the home run. It is responsible for carrying the electrical current from the fuses to the main power source in the home. The riser is an essential component of the electrical system as it ensures that the electrical power is distributed properly throughout the home.

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89. The sewage treatment process that involves the use of hydrochloride to kill pathogenic bacteria?

Explanation

Disinfection is the correct answer because it refers to the process of using a chemical agent, such as hydrochloride, to kill or inactivate pathogenic bacteria in sewage. This process helps to ensure that the treated sewage is safe for disposal or reuse. Aeration is the process of adding oxygen to the sewage to promote the growth of beneficial bacteria that break down organic matter. Chlorination involves the use of chlorine to kill bacteria and other microorganisms. Hydro-chlorine filtration is not a recognized term or process in sewage treatment.

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90. In high rise buildings, why is there a need to resize water supply pipes?

Explanation

The need to resize water supply pipes in high rise buildings is to use up the difference in pressure from the service to the supply fixtures. This means that the pipes are adjusted in size to ensure that the water pressure is distributed evenly throughout the building, allowing for proper functioning of the fixtures. By resizing the pipes, the pressure can be regulated and maintained at an appropriate level for each fixture.

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91. Minimum height of siamese connection from ground line?

Explanation

The minimum height of the siamese connection from the ground line is 38mm.

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92. Water well yield is a factor considered to determine the size of?

Explanation

Water well yield refers to the amount of water that a well can produce over a given period of time. The size of the water pipe is determined based on the well yield because it needs to be able to handle the maximum amount of water that the well can produce. If the water pipe is too small, it may not be able to deliver the water efficiently, leading to low water pressure or even damage to the pipe. Therefore, the size of the water pipe is directly influenced by the water well yield.

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93. A type of coupling or joining device having internal screw threads or nuts with opposite screws at the end. By turning the internal screws, it is possible to connect two metal rods and regulate the length and tension of this rods?

Explanation

A turnbuckle is a type of coupling or joining device that has internal screw threads or nuts with opposite screws at the end. By turning the internal screws, it is possible to connect two metal rods and regulate the length and tension of these rods.

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94. What pipe should not be buried underground?

Explanation

Polyethylene pipe should not be buried underground because it is not resistant to UV rays and can degrade over time when exposed to sunlight. This can lead to cracks, leaks, and eventual failure of the pipe. Therefore, it is recommended to use other types of pipes such as BI (black iron) or GI (galvanized iron) pipes for underground burial.

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95. In the given figure, identify the plumbing fixture in label "8"?

Explanation

The correct answer is 4" closet bend. The figure shows various plumbing fixtures labeled with numbers. The label "8" corresponds to a 4" closet bend, which is a curved pipe fitting used to connect the toilet to the drain pipe. This fitting allows for a smooth flow of waste from the toilet into the drainage system.

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96. A drain connecting one or more fixtures to a solid or waste stack?

Explanation

A combined drain is a type of drain that connects multiple fixtures to a solid or waste stack. This means that it can collect wastewater from different sources, such as sinks, toilets, and showers, and direct it to a main drainage system. The term "combined" refers to the fact that it combines the drainage from multiple fixtures into one drain line. This type of drain is commonly used in residential and commercial buildings to efficiently manage wastewater disposal.

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97. There are several reasons why soil stacks are not allowed in columns. Which is not a reason?

Explanation

The reason why cracks and leaks cannot be detected is not a reason for why soil stacks are not allowed in columns. Soil stacks are not allowed in columns because pipes will interfere with reinforcing bars, the size of the columns will be larger, and the gas emitted will deteriorate concrete. However, cracks and leaks not being detectable is not mentioned as a reason for not allowing soil stacks in columns.

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98. Base on the figure shown, Which of the WC is the noisiest?

Explanation

The noisiest is washdown. The answer is correct. Try to see the photo again.

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99. A common ingredients for water disinfectant, except for ?

Explanation

The correct answer is bichlor. This is because trichlor, dichlor, and trichloro-S-triazinetrione are all common ingredients used in water disinfectants, while bichlor is not.

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100. Copper pipes are classified as what main pipe?

Explanation

Copper pipes are not classified as galvanized iron or PVC pipes because these materials are different from copper. Copper pipes are also not classified as stainless steel (s/s) pipes because stainless steel is a separate material. The correct answer is ceramic, which means that copper pipes are classified as ceramic pipes.

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101. The minimum number of a urinal fixture required for the male population of both elementary and secondary school?

Explanation

The correct answer is 1 per 30. This means that for every 30 males in the population of both elementary and secondary school, there should be at least one urinal fixture available. This ensures that there are enough facilities to accommodate the male population and prevent long waiting times or overcrowding in the restrooms.

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102. How do you connect 2 hub less cast iron pipes?

Explanation

A structural compression gasket is used to connect two hub less cast iron pipes. This type of gasket provides a secure and tight seal between the pipes, ensuring that there are no leaks or disruptions in the flow of fluid. It is designed to withstand the pressure and stress placed on the pipes, making it an ideal choice for connecting hub less cast iron pipes. Couplings and elbows may also be used in pipe connections, but in this specific scenario, a structural compression gasket is the correct choice.

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103. How do we size sewage pits?

Explanation

To size sewage pits, we need to consider the volume of solid waste only. This is because sewage pits are designed to hold and treat solid waste, such as feces, toilet paper, and other non-liquid materials. The volume of liquid waste is not relevant in this context, as it typically flows through the pit and is treated separately. Similarly, the volume of stormwater is not considered when sizing sewage pits, as stormwater is typically managed through separate drainage systems. Therefore, the correct answer is to consider the volume of solid waste only when sizing sewage pits.

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104. The minimum size of a swimming pool drain?

Explanation

The minimum size of a swimming pool drain is 2" diameter. This size is necessary to ensure proper water flow and prevent any potential hazards or accidents. A smaller drain size may lead to inadequate drainage and increase the risk of entrapment or suction entanglement. Therefore, a 2" diameter drain is the appropriate minimum size for a swimming pool to maintain safety and functionality.

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105. Which plumbing fixture does not have a water-saving feature?

Explanation

The correct answer is "flow limiting feature." This is because a flow limiting feature actually helps to conserve water by restricting the flow rate of water through a plumbing fixture. On the other hand, a lavatory with pop-up, a 1.5 gallon flush water closet, and a waterless urinal all have water-saving features.

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106. What is the color of communication line piping?

Explanation

The color of communication line piping is gray.

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107. Base on the figure shown, identify the type of closet at leter "A"?

Explanation

Based on the figure shown, the type of closet at letter "A" can be identified as a siphon-jet closet.

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108. The prescribe color coding of piping under refrigerating division of all pipes and fittings?

Explanation

The color coding for piping under the refrigerating division is black. This color is typically used to indicate that the pipe contains refrigerant. By using black color coding, it helps to easily identify and differentiate the refrigerant pipes and fittings from other pipes in the system. This is important for maintenance and troubleshooting purposes, as well as for ensuring the safe handling and operation of the refrigeration system.

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109. Best size of pipe connected to 5 sinks?

Explanation

The best size of pipe connected to 5 sinks would be 4". This is because a larger pipe diameter allows for better water flow and reduces the chances of clogging or blockages. With 5 sinks, there would be a higher demand for water flow, and a 4" pipe would be able to handle this demand more effectively compared to the smaller pipe sizes listed.

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110. The minimum slope of a building drain?

Explanation

The minimum slope of a building drain is 1/16 in./ft. This means that for every 1 foot of horizontal distance, the drain should have a downward slope of 1/16 inch. This slope is necessary to ensure proper drainage and prevent the accumulation of waste and water in the drain. A steeper slope would cause the water to flow too quickly, potentially causing damage to the drain, while a shallower slope would not provide enough force to effectively move the waste and water through the drain.

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111. Minimum clearance from the floor of pipes for AC units when crossing a hallway or corridor?

Explanation

The minimum clearance from the floor of pipes for AC units when crossing a hallway or corridor is 2.3 m. This clearance is necessary to ensure that there is enough space for people to walk under the pipes without any risk of hitting their heads or interfering with the AC unit's functionality. A clearance of 2.3 m allows for comfortable passage while also maintaining the proper distance between the pipes and the floor.

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112. Maximum distance of clean-out should be

Explanation

The maximum distance for a clean-out, which refers to an access point in a plumbing system used for clearing blockages and for inspection, should typically be 10 meters center to center. This guideline ensures that any section of the plumbing can be accessed for maintenance or repair without excessive difficulty, allowing for efficient cleaning and inspection intervals along the pipeline. This distance strikes a balance between having enough access points for maintenance without unnecessarily complicating the plumbing infrastructure.

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113. A pipe fitting shape like letter "S"?

Explanation

A double bend, also known as an S-trap, is a type of pipe fitting that has the shape of the letter "S". It is commonly used in plumbing to create a trap in the drainage system to prevent sewer gases from entering the building. The S-trap configuration can help maintain a water seal in the trap, which is essential for proper drainage and ventilation in plumbing systems.

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114. Fluoride as an addictive in water supply is a chemical for?

Explanation

not-available-via-ai

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115. Which of the following prevents water hammer?

Explanation

An air chamber is a device designed to prevent water hammer in plumbing systems. Water hammer occurs when water flowing through a pipe is suddenly forced to stop or change direction, creating a shock wave that can cause noise and potentially damage the plumbing. An air chamber works by providing a cushion of air within the plumbing system that absorbs the shock wave created by the sudden stopping of water flow, thereby preventing water hammer. This makes the air chamber an effective solution for mitigating the impacts of water hammer in plumbing systems.

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What is use for water treatment in a swimming pool?
What is the typical slope of a waste pipe?
This material is used in threaded pipe connections to prevent leakage
Where should you place soil-pipes for high-rise structures?
In the figure above, which is a reducing socket?
What is installed in a fixture to alleviate the effects of too much...
In plumbing system, if pipes are electrical wires, what are the...
A pipe fitting to join two straight lengths of pipes?
Best for sanitary pipes?
What is used to shut off flow of water during maintenance?
An elbow having lugs for attachment to wall or joist?
What type of pipe is not recommended for water line?
In the figure above, which is a flange adaptor?
What is the color coding of pipes for potable water?
One of the first steps in the selection of a suitable water supply...
There is a septic tank installed on top of a rock by seashore. The...
The minimum distance (in meters) of a well from a septic tank?
A pipe fitting having a large radius of curvature?
Plumbing permit shall be invalid if work has not commenced after a...
A pipe fitting to change in one single direction (course) the flow of...
What is the best fixture for a public comfort room?
 A pipe which conveys only liquid waste, free of fecal matter?
What type of materials is used for the base of a septic tank?
 Theater or movie house's water requirement is determined or...
What do you call a water-tight receptacle used to store household...
A toilet bowl in which the flushing water enters through the rim and...
What do you call a liquid waste ( without urine/ industrial waste)...
The minimum size of a trap and waste branch for a shower stall?
Opening use to received pipes?
Standard Water pressure from NAWASA?
Valve permitting a gas or liquid to flow in 1 direction?
In a location where there is no provision for drainage line, what is...
A sewage treatment that includes the exposure to air?
Black steel pipe with galvanized malleable fitting is ideal for?
In storm drainage system, it is used to prevent aggregates, debris and...
Where traps are used to prevent foul odor from coming out. Which of...
The quality of Galvanized Iron pipes are rated by?
A piece of pipe threaded outside all through out to connect short runs...
Minimum size of trap of shower drain?
Best location to put the soil pipes?
What property is used to distinguish between potable and sanitary uPVC...
Where is water meter located?
 Women's urinal fixture?
A tee having a slight curve in 90degree bend transition to channel the...
The part of a vent line which connects directly with an individual...
The minimum number of water closet unit required for the female...
What should not be permitted to cross a beam?
What is used in water pipelines to absorb the shock caused by water...
A general term used for any vertical line of soil, waste, or vent...
The minimum sized of a trap and waste branch for a pedestal urinal?
A pipe that conveys the discharge of water closets or fixtures having...
What is the minimum trap seal?
Which wall is best suited if soil pipe will run through it?
What is the principle of governing the size of pipes in designing...
Kind of pipe not suited to be exposed to ultraviolet rays?
During the site inspection, the architect notices that a soil pipe...
What can be discharge directly to sewer system?
What is the maximum depth of septic tank?
According to NBC, pipe support should be every,
A tee shaped pipe fitting for making a three-way joint?
How could you differentiate between a soil and waste pipe when laid...
How do you connect PPRC?
Can you embed a 4" diameter pipe in a 150 wall?
Should not be used for a pipe chase?
Base on the figure above, which of the following is a 1/8 bend...
Base on the figure above, which of the following is a 1/4 bend...
A faucet fitted with nozzle curving downward used as a draw-of trap?
When water goes up through a vertical pipe, it stops at a certain...
Where would you locate  water distribution pipe farthest from?
A plumbing devices designed to intercept most greases and solids...
The minimum sized of a trap and waste branch for a size of foot bath?
An individual vent for a plumbing fixture  located at the...
Which is not a rule of a thumb when designing a drainage?
A cross fitting having a slight curve in each of the 90degree...
Where will you least place a downspout?
What is the color of pipes for steam?
Where are storm sewer usually placed?
What is the standard water consumption (gallon/ person/day) used in a...
When there is a low pressure from the water main, what will you use to...
What is the most efficient tools for cutting cast iron pipe?
A term used to describe pumps that are interconnected with each other?
The minimum size of trap and waste branch for a bidet?
Allowable slope of sanitary sewer?
Level 3 types of water service refers to?
Alternative to the conventional septic tank?
A pump used to eject sewage or liquid waste?central sewage booster
What do you call a control valve used to shut off at the water supply...
It is the line in a single diagram that runs from the fuses to the...
The sewage treatment process that involves the use of hydrochloride to...
In high rise buildings, why is there a need to resize water supply...
Minimum height of siamese connection from ground line?
Water well yield is a factor considered to determine the size of?
A type of coupling or joining device having internal screw threads or...
What pipe should not be buried underground?
In the given figure, identify the plumbing fixture in label...
A drain connecting one or more fixtures to a solid or waste stack?
There are several reasons why soil stacks are not allowed in columns....
Base on the figure shown, Which of the WC is the noisiest?
A common ingredients for water disinfectant, except for ?
Copper pipes are classified as what main pipe?
The minimum number of a urinal fixture required for the male...
How do you connect 2 hub less cast iron pipes?
How do we size sewage pits?
The minimum size of a swimming pool drain?
Which plumbing fixture does not have a water-saving feature?
What is the color of communication line piping?
Base on the figure shown, identify the type of closet at leter...
The prescribe color coding of piping under refrigerating division of...
Best size of pipe connected to 5 sinks?
The minimum slope of a building drain?
Minimum clearance from the floor of pipes for AC units when crossing a...
Maximum distance of clean-out should be
A pipe fitting shape like letter "S"?
Fluoride as an addictive in water supply is a chemical for?
Which of the following prevents water hammer?
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