Master Plumber Practice Exam (Sanitation, Design & Installation)
Master Plumbers are bound by a code of ethics, insured for six years, licensed and registered, highly trained, quality tradesman and backed by the industry. The highest level is the master plumber, which requires experience as a journeyman plumber. The quiz below covers sanitation, Design & Installation for that plumber exam. Give it a try.
Questions and Answers
- 1.
A seepage is defined as a sewage terminal
- A.
Receiving both liquid and solid waste
- B.
Receiving only liquid waste
- C.
Receiving only solid waste
- D.
Receiving direct human excrement
Correct Answer
B. Receiving only liquid wasteExplanation
The correct answer is "receiving only liquid waste." A seepage refers to a sewage terminal that receives only liquid waste. This means that it does not handle solid waste or direct human excrement.Rate this question:
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- 2.
Construction of septic tank should be located at a distance away from the pressure public main to prevent sanitation
- A.
15.2 meters
- B.
1.5 meters
- C.
3 meters
- D.
1 meter
Correct Answer
C. 3 metersExplanation
The correct answer is 3 meters. Septic tanks should be located at a distance of at least 3 meters away from the pressure public main to prevent contamination of the water supply. This distance ensures that any potential leaks or seepage from the septic tank do not reach the main water source, maintaining sanitation and preventing the spread of diseases.Rate this question:
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- 3.
Pour index horsepower is how many foot lbs per minutes
- A.
30,000
- B.
33,000
- C.
33,333
- D.
32,564
Correct Answer
B. 33,000Explanation
Pour index horsepower is a unit used to measure the power output of an engine. It represents the amount of work done per minute, measured in foot-pounds. The correct answer is 33,000 because it is the closest value to the standard conversion factor of 1 horsepower being equal to 33,000 foot-pounds per minute.Rate this question:
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- 4.
Bacteria which has no function in sewage treatment
- A.
Non-aerobic bacteria
- B.
Pathogenic bacteria
- C.
Facultative bacteria
- D.
Aerobic bacteria
Correct Answer
B. Pathogenic bacteriaExplanation
Pathogenic bacteria are disease-causing bacteria that can be harmful to humans and other organisms. While sewage treatment typically involves the use of bacteria to break down organic matter, pathogenic bacteria have no function in this process and can even pose a risk to public health if present in sewage. Therefore, pathogenic bacteria are the correct answer as they do not play a role in sewage treatment.Rate this question:
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- 5.
What is the minimum pressure outlet to operate a flush valve in water closet and urinal?
- A.
10 psi
- B.
25 psi
- C.
15 psi
- D.
20 psi
Correct Answer
C. 15 psiExplanation
The minimum pressure outlet required to operate a flush valve in a water closet and urinal is 15 psi. This means that the water pressure needs to be at least 15 pounds per square inch in order for the flush valve to function properly.Rate this question:
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- 6.
The appropriate type of material for vent pipes in an acid waste system is,
- A.
Malleable iron
- B.
Galvanize iron
- C.
DWV copper
- D.
Plastic
Correct Answer
D. PlasticExplanation
Plastic is the appropriate type of material for vent pipes in an acid waste system. This is because plastic is highly resistant to corrosion and can withstand the corrosive nature of acids. It is also lightweight and easy to install, making it a practical choice for vent pipes. Additionally, plastic pipes are cost-effective and have a long lifespan, making them a reliable option for acid waste systems.Rate this question:
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- 7.
Where is surface water for domestic use collected?
- A.
Seas
- B.
Streams
- C.
Mountains
- D.
Oceans
Correct Answer
B. StreamsExplanation
Surface water for domestic use is collected from streams. Streams are bodies of water that flow continuously in a channel, such as rivers or creeks. These water sources are often accessible and provide a reliable supply of fresh water for various domestic purposes, including drinking, cooking, and cleaning. Unlike seas, oceans, or mountains, streams are more easily accessible and provide a more suitable source of surface water for domestic use.Rate this question:
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- 8.
What is the least method to lay a PB or PE tube on trenches?
- A.
Stretched
- B.
Straight line
- C.
On steel sleeves
- D.
Snake line
Correct Answer
A. StretchedExplanation
The least recommended method to lay PB (Polybutylene) or PE (Polyethylene) tubes in trenches is "stretched." Stretching the tubes can put them under tension, which might not accommodate the natural ground movements or temperature changes that cause expansion and contraction. This could lead to damage over time. The correct practices usually involve laying the tubes with some slack (like in a snake line) to allow for such movements, or protecting them with steel sleeves, or ensuring they are laid in conditions that match the material's requirements for expansion and contraction. My previous answer inaccurately described the "snake line" as the least recommended method, when in fact, laying the tubes stretched tight without allowance for movement would be less advisable.Rate this question:
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- 9.
What really seals a caulked joint?
- A.
Epoxy
- B.
Pig lead
- C.
Cement
- D.
Oakum
Correct Answer
B. Pig leadExplanation
Pig lead is the correct answer because it is commonly used to seal caulked joints. Pig lead is a soft and malleable material that can be easily shaped and pressed into the joint to create a tight seal. It has excellent sealing properties and is resistant to water and other liquids, making it an effective choice for sealing joints.Rate this question:
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- 10.
PE plastic tubing is a material used for water service connection. What is the meaning of PE?
- A.
Plastic Expander
- B.
Poly Enzyme
- C.
Plastic Extrusion
- D.
Polyethylene
Correct Answer
D. PolyethyleneExplanation
PE stands for Polyethylene, which is a common plastic material used for making pipes and tubing for water service connections due to its flexibility, durability, and resistance to chemicals and corrosion.Rate this question:
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- 11.
What fitting is needed in a cleanout if the pipe is 6" diameter?
- A.
Nipple
- B.
Reducer
- C.
Elbow
- D.
Long sweep
Correct Answer
B. ReducerExplanation
A reducer fitting is needed in a cleanout if the pipe is 6" diameter because a cleanout is typically a larger opening in the pipe that allows for easy access to the inside of the pipe for cleaning or inspection purposes. Since the pipe diameter is 6", a reducer fitting is required to connect the larger cleanout opening to the smaller diameter of the pipe. This ensures a proper and secure fit between the cleanout and the pipe, allowing for effective maintenance and cleaning of the pipe system.Rate this question:
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- 12.
What produces when magnesium salt is present in water?
- A.
Mineral hardness
- B.
Permanent hardness
- C.
Total hardness
- D.
Temporary hardness
Correct Answer
A. Mineral hardness -
- 13.
What is the name of the process in which steel and wrought iron pipe rust?
- A.
Sand blast
- B.
Electrolysis
- C.
Tuberculation
- D.
Percolation
Correct Answer
C. TuberculationExplanation
Tuberculation is the process in which steel and wrought iron pipes rust. It refers to the formation of small, rounded deposits or tubercles on the inner surface of the pipes. These tubercles are formed as a result of the corrosion of the metal, leading to the accumulation of iron oxide or rust. Over time, tuberculation can cause the pipes to become weakened and eventually fail if not addressed.Rate this question:
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- 14.
Which of these stages is not one among cycle of water?
- A.
Saturation
- B.
Precipitation
- C.
Evaporation
- D.
Condensation
Correct Answer
A. SaturationExplanation
Saturation is not one of the stages in the cycle of water. The water cycle consists of four main stages: evaporation, condensation, precipitation, and collection. During evaporation, water changes from a liquid state to a gaseous state. Condensation occurs when the water vapor in the air cools and turns back into liquid water. Precipitation refers to the process where water droplets in the atmosphere come together to form larger droplets and fall to the ground as rain, snow, sleet, or hail. Finally, collection involves the gathering of water in bodies such as rivers, lakes, and oceans. Saturation, on the other hand, refers to the point at which a substance can no longer dissolve in a solvent and is not directly part of the water cycle.Rate this question:
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- 15.
What is the minimum retention period of waste water in a septic tank which will settle and stabilize solids suspended in water?
- A.
12 hrs
- B.
24 hrs
- C.
36 hrs
- D.
30 hrs
Correct Answer
B. 24 hrsExplanation
The retention period in a septic tank, typically around 24 hours, allows wastewater to settle and stabilize solids suspended in water. During this time, heavier solids settle to the bottom as sludge, while lighter materials float to the top as scum. This process ensures that only clarified effluent exits the tank for further treatment. Adequate retention time is crucial for the proper functioning of the septic system and prevents untreated wastewater from entering the drain field.Rate this question:
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- 16.
What water is a portion of rainwater which percolate into the earth to form underground deposit?
- A.
Dew
- B.
Surface
- C.
Spring surface
- D.
Ground water
Correct Answer
D. Ground waterExplanation
Ground water refers to the portion of rainwater that percolates into the earth and forms underground deposits. It is the water that is stored in the spaces between rocks and soil underground. This water can be accessed through wells and springs, and it is an important source of drinking water and irrigation for many communities. Ground water is replenished through the process of precipitation and can take years or even centuries to fully recharge.Rate this question:
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- 17.
What should be done before working with lead that is wet?
- A.
Pre-heat
- B.
Use blower
- C.
Wipe it
- D.
Use drier
Correct Answer
C. Wipe itExplanation
Before working with wet lead, it is important to wipe it. This is because lead can be toxic, and when it is wet, it can be more easily absorbed into the body through skin contact or inhalation. Wiping the wet lead helps to remove any excess moisture, reducing the risk of exposure to the toxic substance.Rate this question:
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- 18.
Water is many times heavier than air by?
- A.
803
- B.
830
- C.
308
- D.
300
Correct Answer
B. 830Explanation
Water is many times heavier than air by 830. This means that the weight of a given volume of water is 830 times greater than the weight of the same volume of air. This is because water has a higher density compared to air, meaning that more mass is packed into a given volume of water compared to air. Therefore, water is much heavier than air.Rate this question:
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- 19.
When should pipe be reamed to remove burrs?
- A.
After threading
- B.
Before cutting
- C.
Before threading
- D.
After cutting
Correct Answer
A. After threadingExplanation
The pipe should be reamed to remove burrs after threading because the process of threading can create rough edges and burrs on the inside of the pipe. Reaming helps to smooth out these rough edges and remove any burrs, ensuring that the pipe is clean and ready for use. If reaming is done before threading, it may not effectively remove the burrs created during the threading process. Similarly, if reaming is done after cutting, it may not address the burrs created during the threading process. Therefore, the correct time to ream the pipe is after threading.Rate this question:
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- 20.
Iron in the form of ferrous bicarbonate can be removed from water by means of
- A.
Aeration
- B.
Limestone filtration
- C.
Activated charcoal filtration
- D.
Sedimentation
Correct Answer
C. Activated charcoal filtrationExplanation
Activated charcoal filtration is an effective method for removing iron in the form of ferrous bicarbonate from water. Activated charcoal has a high surface area and is capable of adsorbing impurities, including iron, from water. The porous structure of activated charcoal allows it to trap and retain the iron particles, preventing them from passing through the filtration system. This process helps to improve the quality of water by reducing the iron content and making it safe for consumption.Rate this question:
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- 21.
What kind of lubricant is use during operation for threading machine?
- A.
Animal oil
- B.
Vegetable oil
- C.
Water soluble oil
- D.
Engine oil
Correct Answer
C. Water soluble oilExplanation
Water soluble oil is used as a lubricant during operation for threading machines. This type of oil is mixed with water to create a solution that can be easily applied to the machine. Water soluble oil has excellent lubricating properties and helps to reduce friction and heat generated during the threading process. It also helps to prolong the life of the machine and ensure smooth and efficient operation. Additionally, water soluble oil is environmentally friendly and easy to clean up after use.Rate this question:
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- 22.
What should be used in supporting suspended horizontal single run plumbing pipe?
- A.
Clevis hanger
- B.
Clamp hanger
- C.
Bracket hanger
- D.
Trapege hanger
Correct Answer
A. Clevis hangerExplanation
A clevis hanger should be used to support a suspended horizontal single run plumbing pipe. Clevis hangers are designed to provide support and stability to pipes by attaching to a structural beam or ceiling. They consist of a U-shaped metal bracket with holes for bolts or rods to secure the pipe in place. Clevis hangers are commonly used in plumbing installations to prevent sagging or movement of pipes, ensuring the proper functioning and longevity of the plumbing system.Rate this question:
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- 23.
What is the partner of the gate valve in the g.i. pipe system of installation?
- A.
Union patente
- B.
Check valve
- C.
Coupling
- D.
Hub and spigot
Correct Answer
B. Check valveExplanation
In a g.i. pipe system of installation, the partner of the gate valve is a check valve. A check valve is designed to allow the flow of fluid in one direction only, preventing backflow or reverse flow. It ensures that the fluid flows in a single direction, maintaining the desired flow and preventing any potential damage or contamination to the system. Therefore, a check valve is the appropriate partner for a gate valve in a g.i. pipe system.Rate this question:
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- 24.
What is the test used in determining if a newly installed water system is leak free?
- A.
Pressure test
- B.
Hydraulic test
- C.
Hydrostatic test
- D.
Leak test
Correct Answer
A. Pressure testExplanation
A pressure test is used to determine if a newly installed water system is leak-free. This test involves pressurizing the system to a specific level and monitoring it for any drop in pressure, which would indicate a leak. A hydraulic test, on the other hand, is used to check the performance and functionality of hydraulic systems. A hydrostatic test is similar to a pressure test but specifically involves testing the strength and integrity of pipes or vessels. A leak test is a more general term and can refer to various methods used to detect leaks in different systems.Rate this question:
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- 25.
One of the first steps in the selection of suitable water supply source is
- A.
Water demand
- B.
Budgetary cost
- C.
Water potability
- D.
Topography
Correct Answer
C. Water potabilityExplanation
The correct answer is water potability. When selecting a suitable water supply source, it is important to consider the potability of the water. This refers to the quality and safety of the water for human consumption. It is crucial to ensure that the water source meets the necessary standards and regulations to avoid any health risks. Water demand, budgetary cost, and topography are also important factors to consider, but water potability takes precedence as it directly affects the health and well-being of the population.Rate this question:
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- 26.
Which of these pipes is measured on the outside diameter
- A.
Galvanized iron pipe
- B.
Asbestos
- C.
Concrete pipe
- D.
Copper pipe
Correct Answer
D. Copper pipeExplanation
Copper pipe is measured on the outside diameter. The outside diameter refers to the measurement of the pipe from one outer edge to the opposite outer edge. In the case of copper pipe, the measurement is taken on the outside of the pipe. This is different from other types of pipes, such as galvanized iron, asbestos, and concrete pipes, which may be measured on the inside diameter or have different measurement methods altogether.Rate this question:
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- 27.
How can acidity of water be neutralized?
- A.
Crushed stone filtration
- B.
White sand filtration
- C.
Marble stone filtration
- D.
Green and filtration
Correct Answer
C. Marble stone filtrationExplanation
The acidity of water can be neutralized by using marble stone filtration. Marble is composed primarily of calcium carbonate (CaCO3), which can react with acidic substances in the water, such as hydrogen ions (H+), to form carbon dioxide (CO2) and water (H2O), thereby neutralizing the acidity. This process is known as chemical neutralization and is commonly employed in water treatment to adjust the pH of acidic water to a more neutral level.Rate this question:
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- 28.
What is the device or fitting used to provide a liquid seal to keep sewer gases out of the house without affecting the flow of waste water sewage?
- A.
Running trap
- B.
Plumbing trap
- C.
Trap seal
- D.
Backwater valve
Correct Answer
B. Plumbing trapExplanation
The device used to provide a liquid seal that keeps sewer gases out of buildings while allowing waste water to flow through is called a "plumbing trap." This device, typically found under sinks, toilets, and other drainage areas, holds a small amount of water in a curved section of pipe to block the passage of sewer gases into the house.Rate this question:
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- 29.
Which of these joints is adaptable to assemble cast iron pipe hub and spigot type?
- A.
Compression joints
- B.
Screwed joints
- C.
Brazed joints
- D.
Mortar joints
Correct Answer
A. Compression jointsExplanation
The joint that is adaptable to assemble cast iron pipe hub and spigot type is the compression joint. These joints allow for a tight seal between the hub (bell) and the spigot end of the cast iron pipes, ensuring a secure connection without the need for welding or soldering.Rate this question:
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- 30.
What pressure is loss caused by water flowing thru the pipe in a system?
- A.
Dynamic
- B.
Friction loss
- C.
Static water pressure
- D.
Water pressure
Correct Answer
B. Friction lossExplanation
Friction loss refers to the pressure drop that occurs when water flows through a pipe in a system. As water moves through the pipe, it encounters resistance from the inner surface of the pipe, causing a decrease in pressure. This loss of pressure is known as friction loss. It is important to consider friction loss in order to properly design and size pipes for efficient water flow in a system.Rate this question:
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- 31.
What system uses an assembly of mechanical device which raise water using compressed air as delivery method.
- A.
(pneumatic) air pressure system
- B.
Downfeed system
- C.
Overhead feed system
- D.
Deepwell system
Correct Answer
A. (pneumatic) air pressure systemExplanation
A pneumatic air pressure system uses an assembly of mechanical devices to raise water using compressed air as the delivery method. Compressed air is used to create pressure, which pushes the water through the system, allowing it to be raised to a desired height. This system is commonly used in various applications where a reliable and efficient method of water transportation is required.Rate this question:
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- 32.
Which of these maintenance procedures maybe performed on a pump while it is running?
- A.
Lubricating the impeller fins
- B.
Tightening the packing nut
- C.
Replacing the seal parts
- D.
Replacing the packing
Correct Answer
B. Tightening the packing nutExplanation
Tightening the packing nut can be performed on a pump while it is running because it involves adjusting the packing material around the pump shaft to prevent leakage. This procedure does not require the pump to be shut down or stopped, allowing it to continue operating while the packing is adjusted.Rate this question:
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- 33.
What is the distance between the faucet outlet and the flood rim of the basin into which it discharges?
- A.
Air chamber
- B.
Air gap
- C.
Air valve
- D.
Air bubble
Correct Answer
B. Air gapExplanation
The distance between the faucet outlet and the flood rim of the basin is referred to as the air gap. This is a necessary feature to prevent backflow contamination, as it creates a physical barrier between the water supply and the basin. The air gap ensures that in the event of a drop in water pressure, contaminated water cannot flow back into the clean water supply.Rate this question:
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- 34.
Where is rainwater for domestic use collected?
- A.
Lakes
- B.
Grounds
- C.
Plants
- D.
Roofs
Correct Answer
D. RoofsExplanation
Rainwater for domestic use is collected from roofs. This is because roofs provide a large surface area for rainwater to fall on and collect. The rainwater is then directed into gutters and downspouts, which lead to storage tanks or other collection systems. Collecting rainwater from roofs is a common practice as it allows for the harvesting and utilization of a natural resource, reducing the reliance on other water sources and promoting sustainability.Rate this question:
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- 35.
A urinal stall type should have a minimum water supply size
- A.
3/4"
- B.
5/8"
- C.
1 1/4"
- D.
3/8"
Correct Answer
A. 3/4"Explanation
The correct answer is 3/4". A urinal stall type should have a minimum water supply size of 3/4". This is because a larger water supply size is required to ensure an adequate flow of water for flushing and maintaining cleanliness in the urinal stall. A smaller water supply size, such as 5/8" or 3/8", may not provide enough water flow and could result in inadequate flushing and potential hygiene issues. A larger water supply size, such as 1 1/4", may be excessive and wasteful in terms of water usage.Rate this question:
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- 36.
How many lavatories shall be installed in an office with 160 female employee.
- A.
3
- B.
4
- C.
2
- D.
5
Correct Answer
B. 4Explanation
*##*1 lavatory : 40 female employee*##*Rate this question:
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- 37.
What is the recommended size of service pipe approved by MWSS for a 2 storey residential house?
- A.
1 1/4" diam. - 31mm diam.
- B.
1" diam. - 25mm diam.
- C.
1/2" diam. - 12mm diam.
- D.
3/4" diam. - 19mm diam.
Correct Answer
D. 3/4" diam. - 19mm diam.Explanation
The recommended size of service pipe approved by MWSS for a 2 storey residential house is 3/4" diameter or 19mm diameter. This size is appropriate for the water needs of a typical 2 storey residential house, providing sufficient water pressure and flow rate for household activities such as showering, washing dishes, and doing laundry. Choosing a smaller diameter pipe may result in inadequate water supply and reduced water pressure, while a larger diameter pipe may be unnecessary and lead to increased costs.Rate this question:
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- 38.
What is the minimum size of water supply for water closet flush valve type?
- A.
1/2"
- B.
1"
- C.
1 1/4"
- D.
3/4"
Correct Answer
B. 1"Explanation
The minimum size of water supply for a water closet flush valve type is 1 inch. This means that the water supply pipe that connects to the flush valve should have a diameter of at least 1 inch to ensure sufficient water flow for flushing the toilet.Rate this question:
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- 39.
How can sulphur in the form of hydrogen sulphates be removed from water?
- A.
Aeration
- B.
Evaporation
- C.
Filtration
- D.
Sedimentation
Correct Answer
A. AerationExplanation
Aeration is the process of introducing air into water, which helps in removing sulphur in the form of hydrogen sulphates. When air is introduced, oxygen reacts with the hydrogen sulphates to form sulphur dioxide gas, which then escapes into the atmosphere. This process is effective in reducing the concentration of sulphur compounds in water and improving its quality.Rate this question:
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- 40.
What is joining compound is used to assemble poly vinyl chloride pipe and fitting together
- A.
Epoxy
- B.
Solvent cement
- C.
Rugby
- D.
Glue
Correct Answer
B. Solvent cementExplanation
Solvent cement is the joining compound used to assemble poly vinyl chloride (PVC) pipe and fittings together. PVC pipes and fittings are commonly used in plumbing and construction projects. Solvent cement is a strong adhesive that works by chemically bonding the PVC materials together. It is applied to the surfaces of the pipe and fittings, and when it dries, it creates a secure and watertight connection. Epoxy, rugby, and glue are not typically used for joining PVC pipes and fittings.Rate this question:
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- 41.
What is the common pipe material use for in house water system?
- A.
BI pipe
- B.
CI pipe
- C.
GI pipe
- D.
AC Pipe
Correct Answer
C. GI pipeExplanation
GI pipe, which stands for Galvanized Iron pipe, is commonly used in house water systems. This type of pipe is made of iron or steel and is coated with a layer of zinc to prevent corrosion. The zinc coating also helps to extend the lifespan of the pipe and maintain water quality. GI pipes are known for their durability, strength, and resistance to rust, making them a suitable choice for transporting water in residential buildings.Rate this question:
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- 42.
What is the common pipe material use for in house water system?
- A.
BI pipe
- B.
CI pipe
- C.
GI pipe
- D.
AC Pipe
Correct Answer
C. GI pipeExplanation
GI pipe, or Galvanized Iron pipe, is commonly used for in-house water systems. This type of pipe is made of iron or steel and is coated with a layer of zinc to prevent corrosion. The zinc coating helps to protect the pipe from rust and extends its lifespan. GI pipes are durable, strong, and resistant to various weather conditions, making them suitable for carrying water in residential buildings.Rate this question:
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- 43.
What is required when cast iron pipe and fittings of different size are to be joined or connected?
- A.
Gasket
- B.
Nipple
- C.
An increaser or reducer
- D.
Union patente
Correct Answer
C. An increaser or reducerExplanation
When cast iron pipe and fittings of different sizes need to be joined or connected, an increaser or reducer is required. This is because an increaser allows for the transition from a smaller pipe size to a larger one, while a reducer allows for the transition from a larger pipe size to a smaller one. These fittings ensure a proper and secure connection between the pipes of different sizes.Rate this question:
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- 44.
What is the standard size of cleanout for a 4" diam. pipe?
- A.
3" diam.
- B.
2" diam.
- C.
4" diam.
- D.
3 1/2" diam.
Correct Answer
D. 3 1/2" diam.Explanation
The standard size of a cleanout for a 4" diameter pipe is 3 1/2" diameter. A cleanout is a pipe fitting that provides access to the drainage system for cleaning and maintenance purposes. In this case, the cleanout size is slightly smaller than the pipe diameter to ensure a tight fit and prevent any leakage.Rate this question:
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- 45.
What is the number of thread of 1" diam. to 2" diam. for effective joints?
- A.
8
- B.
11 1/2
- C.
14
- D.
15 1/2
Correct Answer
B. 11 1/2Explanation
The correct answer is 11 1/2. This refers to the number of threads per inch for effective joints when transitioning from a 1" diameter to a 2" diameter. The 11 1/2 threads per inch is a standard measurement for this type of transition, ensuring a secure and effective joint between the two different diameters.Rate this question:
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- 46.
Water is collected from spring and well as source of water for domestic water supply is called
- A.
Underground water
- B.
Natural water
- C.
Surface water
- D.
Ground water
Correct Answer
D. Ground waterExplanation
Ground water refers to the water that is collected from springs and wells as a source of water for domestic water supply. It is the water that is found underground in the cracks and spaces in soil, sand, and rock formations. This water is collected by drilling wells into the ground and pumping it up to the surface. Ground water is an important source of water for various purposes, including drinking, irrigation, and industrial use.Rate this question:
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- 47.
What is meant by PE plastic tube , material used for service connection?
- A.
Plastic extruscion
- B.
Polyethelene
- C.
Polyenzyme
- D.
Plastic expander
Correct Answer
B. PolyetheleneExplanation
Polyethylene (PE) is a type of plastic material commonly used for making plastic tubes. PE plastic tubes are often used for service connections, such as plumbing or electrical connections. Polyethylene is a versatile material that is durable, lightweight, and resistant to chemicals and moisture. It is a popular choice for various applications due to its low cost and easy availability. Therefore, when referring to a PE plastic tube as a material used for service connections, it means that the tube is made of polyethylene.Rate this question:
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- 48.
How does the safely feature of a service hot water system work?
- A.
Mechanically
- B.
Automatically
- C.
Manually
- D.
Electrically
Correct Answer
B. AutomaticallyExplanation
The safely feature of a service hot water system works automatically. This means that it operates without the need for human intervention or manual control. The system is designed to detect any potential risks or malfunctions and take appropriate actions to ensure safety. It can automatically shut off the water supply, adjust temperature settings, or activate safety mechanisms in case of emergencies or abnormal conditions. This automatic functionality adds convenience and peace of mind for users, as they can rely on the system to operate safely without constant monitoring or intervention.Rate this question:
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- 49.
Where does the Level III type of water service referred?
- A.
Individual shallow well handpump installation
- B.
Public faucets
- C.
Individual house pipe in connection with meter
- D.
Artesian well
Correct Answer
C. Individual house pipe in connection with meterExplanation
The Level III type of water service is referred to as individual house pipe in connection with meter. This means that the water service is provided to individual houses through a pipe connected to a meter, which measures the amount of water used. This type of service is typically found in residential areas where each house has its own water connection and meter for billing purposes.Rate this question:
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- 50.
What is the minimum horizontal clear distance of water well supply to building sewer, as per UPC?
- A.
5' (1.50 m)
- B.
10' (3.0 m)
- C.
3' (0.90 m)
- D.
50' (15.2 m)
Correct Answer
D. 50' (15.2 m)Explanation
The minimum horizontal clear distance of water well supply to building sewer, as per UPC, is 50' (15.2 m). This means that there should be a minimum distance of 50 feet between the water well supply and the building sewer. This distance is necessary to prevent any contamination or cross-connection between the water supply and the sewer system. It ensures the safety and quality of the water supply for the building.Rate this question:
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Jun 28, 2024Quiz Edited by
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Jan 16, 2017Quiz Created by
Grazel Marcos
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