2.
Drawing (Answers on Page 195-196, building construction)
1. S-Trap
2. Common P-Trap
3.
Sediment that settles out of sewage, forming a semi-solid mass on the bottom of a septic tank.
Explanation
Sludge refers to the sediment that settles out of sewage and forms a semi-solid mass at the bottom of a septic tank. This is a common occurrence in septic systems where solid waste and other particles separate from the liquid waste. The sludge needs to be periodically removed from the tank to ensure proper functioning of the septic system.
4.
Covered watertight tank for receiving the discharch from a building sewer.
Explanation
A septic tank is a covered watertight tank that is designed to receive and store the discharge from a building sewer. It is an underground system that is commonly used in areas where there is no access to a centralized sewer system. The septic tank allows for the separation and decomposition of solid waste, while the liquid waste is discharged into a drain field or leach field for further treatment and absorption into the soil.
5.
Used for fixtures where grease may be introduced to the drainage or sewer system in quantities that that cann affect line stoppage or hinder sewage treatment or private sewage disposal.
Explanation
A grease trap is a device used in fixtures where grease may be introduced to the drainage or sewer system. It is designed to prevent the grease from entering the system in quantities that can cause line stoppage or hinder sewage treatment or private sewage disposal. The grease trap works by intercepting and separating the grease from the water, allowing the water to flow freely while trapping the grease for later removal. This helps to maintain the efficiency of the drainage system and prevent potential issues caused by excessive grease buildup.
6.
Layer of sewage matter that rises to the surface of the sewage in a septic tank
Explanation
Scum refers to the layer of sewage matter that rises to the surface of the sewage in a septic tank. This layer consists of oils, fats, and other floating debris that cannot be broken down by the bacteria in the tank. The scum layer helps to prevent odors and gases from escaping the tank, while allowing the liquid effluent to pass through and be further treated. Regular maintenance and pumping of the septic tank is necessary to remove the scum layer and prevent it from clogging the system.
7.
Portion penetrating the roof
Correct Answer
A. Vent Stack Through Roof
Explanation
The correct answer is "Vent Stack Through Roof". This refers to a portion of a plumbing system that extends vertically through the roof of a building. It is used to vent sewer gases and odors from the plumbing system, allowing for proper drainage and preventing the build-up of pressure. This vent stack is an essential component of the plumbing system and helps maintain the overall functionality and efficiency of the system.
8.
Group vent pipe that starts in front of the extreme fixture connection on a horizontal branch. Also known as 'loop vent.'
Correct Answer
circuit vent
Explanation
A circuit vent is a group vent pipe that starts in front of the extreme fixture connection on a horizontal branch. It is also known as a "loop vent." This type of venting system allows for proper ventilation and prevents the buildup of pressure in the plumbing system. It ensures that air can enter the system and equalize the pressure, allowing wastewater to flow freely and preventing any potential blockages or backups.
9.
Any part of the piping system other than a main, riser or stack.
Correct Answer
Branch
Explanation
A branch refers to any part of the piping system that is not a main, riser, or stack. It is a smaller pipe that connects to the main pipe and allows for the distribution of water or other fluids to different areas or fixtures. Branches are essential for directing the flow of fluids in a plumbing system and ensuring that water reaches all the necessary areas in a building.
10.
Pump for removing the accumulations of liquid from a sump
Correct Answer
sump pump
Explanation
A sump pump is a device used to remove accumulated liquid from a sump, which is a pit or reservoir that collects water or other liquids. It is typically used to prevent flooding in basements or crawlspaces by pumping out the excess water. The sump pump is designed to automatically activate when the water level in the sump reaches a certain point, and it pumps the water out and away from the building. This helps to keep the area dry and prevent water damage.
11.
Conveys only wastewater or liquid waste free of fecal matter
Correct Answer
Waste Pipe
Explanation
A waste pipe is a type of pipe that is specifically designed to convey only wastewater or liquid waste that is free of fecal matter. This means that it is not used to transport sewage or any other type of waste that contains fecal matter. Instead, it is used to carry water and other liquid waste from sinks, showers, and other fixtures in a building to a sewer or septic system. The purpose of a waste pipe is to provide a safe and efficient way to remove liquid waste from a building without the risk of contamination.
12.
Lowest point on the interior of a drainpipe or sewer where the liquid is deepest.
Explanation
The term "invert" refers to the lowest point inside a drainpipe or sewer where the liquid is the deepest. This is the point where the pipe or sewer is at its lowest elevation, allowing the liquid to accumulate and flow properly. The invert is an important feature in drainage systems as it ensures that the liquid can flow freely and efficiently.
13.
Constructed to provide a liquid seal which prevents backflow of foul air or methane gas without affecting the flow of sewage or wastewater through it.
Correct Answer
Trap
Explanation
A trap is a plumbing device that is designed to create a liquid seal in order to prevent the backflow of foul air or methane gas. It does this without obstructing the flow of sewage or wastewater through the plumbing system. The liquid seal in the trap acts as a barrier, preventing gases from escaping into the living or working space. This helps to maintain a safe and odor-free environment. Traps are commonly used in sinks, toilets, and other plumbing fixtures to ensure proper drainage and ventilation.
14.
Minimum slope or pitch of horizontal drainage pipe
Correct Answer
A. 2% per foot
Explanation
The correct answer is 2% per foot. This means that for every foot of horizontal distance, the drainage pipe should have a slope of 2%. This slope is necessary to ensure that water flows properly and does not accumulate in the pipe, preventing any potential blockages or backups in the system. A steeper slope could cause excessive water flow and potential erosion, while a shallower slope may not provide enough force to move the water effectively. Therefore, a slope of 2% per foot is the optimal choice for horizontal drainage pipes.
15.
Part of the lowest horizontal piping of a plumbing system which receives the discharges from the soil, waste and other drainage pipes inside of a building and conveys it to the house sewer outside of the building.
Correct Answer
House Drain, Building Drain
Explanation
The correct answer is House Drain, Building Drain. The explanation is that the lowest horizontal piping of a plumbing system is called the house drain or building drain. This pipe receives the discharges from the soil, waste, and other drainage pipes inside the building and conveys it to the house sewer outside of the building.
16.
Fixture trap shall have a trap seal of water ______________ .
Correct Answer
A. Not less than 51 mm and not more than 102 mm
Explanation
The correct answer is "not less than 51 mm and not more than 102 mm". This means that the trap seal of water in a fixture trap should be a minimum of 51 mm and a maximum of 102 mm. The trap seal is the amount of water that remains in the trap to prevent sewer gases from entering the building. It is important for the trap seal to be within this range to ensure proper functioning of the plumbing system.
17.
Extends from the house draing at a point 0.60 meters from the outside face of the foundation wall of a building to the junction with the street sewer or any point of discharge and conveying the drainage of one building site.
Correct Answer
House Sewer, Building Sewer
Explanation
The correct answer is House Sewer, Building Sewer. This is because the given description is referring to a sewer system that extends from a building's foundation wall to the street sewer or any point of discharge. This type of sewer system is commonly known as a house sewer or building sewer.
18.
'Collecting Vent Line.'
Correct Answer
Main Vent
19.
Minimum size trap for residential sink
Explanation
The minimum size trap for a residential sink is typically 38mm. This size is necessary to effectively trap and prevent the escape of any solid or liquid waste from the sink. A smaller trap size may not be able to handle the volume and flow of waste, leading to clogs and potential plumbing issues.
20.
One of the oldest materials used for sewer lines. highly resistant to most acids.
Correct Answer
A. Vitrified clay pipe
Explanation
Vitrified clay pipe is one of the oldest materials used for sewer lines because it has been in use for centuries. It is highly resistant to most acids, making it a durable and long-lasting choice for sewer systems. The clay used in these pipes is fired at a high temperature, which creates a dense and non-porous material that can withstand the harsh conditions of underground sewage systems. This makes vitrified clay pipe a reliable option for sewer lines.
21.
Vertical main system of soil, waste or vent pipings extending through one or more stories and extended through the roof.
Correct Answer
stack
Explanation
A stack refers to the vertical main system of soil, waste, or vent piping that extends through one or more stories of a building and is extended through the roof. It is responsible for carrying and disposing of waste and sewage from the upper floors to the lower levels or to the main sewer line. The stack plays a crucial role in maintaining proper plumbing and sanitation in multi-story buildings.
22.
Each plumbing fixture excepting those with integral traps, shall be separately trapped with an approved type duraseal trap
23.
Liquid content of sewage
Correct Answer
effluent
Explanation
Effluent refers to the liquid waste or discharge that is produced by industrial or domestic activities and is released into the environment. In the context of sewage, effluent refers to the liquid content of the sewage that is discharged or released after treatment or processing. This liquid content may contain various pollutants, contaminants, and organic matter that have been removed or reduced through the treatment process. Therefore, the correct answer is effluent.
24.
For ensuring the circulation of air in a plumbing system.
Correct Answer
Vent Pipe
Explanation
A vent pipe is used in a plumbing system to ensure the circulation of air. It allows air to enter and exit the system, preventing the buildup of pressure and allowing wastewater to flow smoothly. Without a vent pipe, the plumbing system may experience issues such as gurgling sounds, slow drainage, or even sewage backups. The vent pipe also helps to prevent the release of harmful gases, such as methane, into the living space. Overall, the vent pipe plays a crucial role in maintaining the proper functioning of a plumbing system.
25.
identify
Correct Answer
A. Running trap
Explanation
A running trap is a type of trap used in plumbing systems to prevent the backflow of sewer gases into a building. It is typically installed in a horizontal pipe and has a continuous flow of water that creates a seal to prevent gases from entering the building. Unlike other traps like the S-trap and P-trap, a running trap does not rely on a water seal created by a vertical pipe. Instead, it uses a continuous flow of water to maintain the seal, making it more effective in preventing sewer gas odors.
26.
Pit or reservoir serving as a draing or receptacle for water and other liquids.
Correct Answer
sump
Explanation
A sump is a pit or reservoir that is used to collect and store water and other liquids. It serves as a drainage or receptacle for these fluids.
27.
Cheapest pipe. light in weight, slightly flexible.
Correct Answer
A. Bituminous fiber sewage pipe
Explanation
Bituminous fiber sewage pipe is the correct answer because it is the cheapest option among the given choices. Additionally, it is light in weight and slightly flexible, making it easier to handle and install compared to other types of pipes.
28.
Oversized pipe functioning both as a soil or waste pipe and a vent
Correct Answer
wet vent
Explanation
A wet vent is an oversized pipe that serves as both a soil or waste pipe and a vent. It allows for the efficient drainage of waste water while also providing ventilation to prevent the build-up of sewer gases. This type of venting system is commonly used in plumbing installations where space is limited or where it is more practical to combine the functions of a soil or waste pipe and a vent into a single pipe.
29.
What pipe is used for underground installations
Correct Answer
A. XV type
Explanation
The XV type pipe is used for underground installations.
30.
Has a Large Diameter (around 0.16m) and lengths ranging from 0.20 to 0.32 m. Used for fixtures that discharge a large amount of water
Correct Answer
drum trap
Explanation
A drum trap is a plumbing fixture that has a large diameter, typically around 0.16 meters, and lengths ranging from 0.20 to 0.32 meters. It is used for fixtures that discharge a large amount of water. The purpose of a drum trap is to trap debris and prevent it from clogging the plumbing system. It is often used in commercial or industrial settings where there is a higher volume of water being discharged. The large size of the drum trap allows for efficient drainage and prevents any blockages from occurring.
31.
A pipe or artificial conduit as underground for carrying off sewage or other liquid waste to a treatment plant.
Correct Answer
sewer
Explanation
A sewer is a pipe or artificial conduit that is used to carry off sewage or other liquid waste to a treatment plant. This explanation directly matches the given correct answer.
32.
'backbone' of the entire sanitary system. Portion where waste does not travel through.
Correct Answer
A. Main soil and waste vent
Explanation
The correct answer is "main soil and waste vent." The main soil and waste vent is the portion of the sanitary system where waste does not travel through. It is essentially the backbone of the entire system, allowing for the release of gases and ventilation.
33.
Most popular and generally specified material for drainage
Correct Answer
cast iron soil pipe, cast iron
Explanation
Cast iron soil pipe is the most popular and generally specified material for drainage because it offers several advantages. Cast iron is known for its durability, strength, and resistance to fire and corrosion, making it suitable for long-lasting drainage systems. It can withstand high pressure and heavy loads, making it ideal for commercial and industrial applications. Cast iron pipes also have excellent sound insulation properties, reducing noise from water flow. Additionally, cast iron is environmentally friendly as it is made from recycled materials and can be recycled again at the end of its lifespan.
34.
Used for lavatories, kitchen sinks, laundry tubs & urinals
Correct Answer
common p-trap
Explanation
A common p-trap is a plumbing device used for lavatories, kitchen sinks, laundry tubs, and urinals. It is designed to prevent sewer gases from entering the building by creating a water seal. The p-trap is shaped like the letter "P" and has a curved section that holds water to block the gases. It is a standard component in plumbing systems and helps maintain proper sanitation and hygiene in these areas.
35.
Used for fixtures such as slop sinks that are usually built low in the ground.
Correct Answer
A. Stand trap
Explanation
A stand trap is a type of trap that is used for fixtures such as slop sinks that are usually built low in the ground. This type of trap is designed to effectively trap and hold water, preventing sewer gases from entering the building. It is called a stand trap because it is elevated or raised above the ground, allowing for proper drainage and preventing clogs.
36.
A chamber of a large septic tank employing siphonic action to automatically discharge a large volume of effluent when a predetermined quantity has accumulated.
Correct Answer
A. Dosing chamber
Explanation
A dosing chamber is a chamber in a septic tank system that is responsible for automatically discharging a large volume of effluent when a predetermined quantity has accumulated. It works by using siphonic action, which creates a vacuum to quickly and efficiently drain the chamber. This helps to prevent the septic tank from becoming overloaded and ensures that the effluent is properly distributed for treatment and disposal.
37.
Where should the septic tank be located
Correct Answer(s)
A. Not underneath the house
A. At least 15 meters from the water distribution system
Explanation
The septic tank should not be located underneath the house because it can cause structural damage and potential health hazards. It should be at least 15 meters away from the water distribution system to prevent contamination of the water supply.