Quiz About Plumbing 1

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Is the art and technique of installing pipes, fixtures and other apparatuses in buildings & bringing the the supply liquids substances &/or ingredients and removing them
- Source distribution
- Plumbing
- Mechanics
- Non of the above

About This Quiz

This Quiz about Plumbing 1 assesses key skills in identifying and understanding various plumbing fittings and systems. It covers G. I. Fittings, valves, and water system components, crucial for anyone training in or working within the plumbing industry.

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2.

Method of introducing a controlled amount of chlorine to the water in order to attain a desired degree of disinfection.
- CHLORINATION
- FLOCCULATION
- FILTRATION
- SEDIMENTATION
Correct Answer

A. CHLORINATION

Explanation

Chlorination is the process of adding a controlled amount of chlorine to water to achieve a desired level of disinfection. Chlorine is a powerful disinfectant that kills bacteria, viruses, and other harmful microorganisms in the water. It is commonly used in water treatment plants to ensure that the water is safe for consumption. By introducing chlorine, the water is effectively disinfected, reducing the risk of waterborne diseases and ensuring the water meets the required standards for public health and safety.

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3.

UPVC means:
- UNPLASTICIZED POLYVINYL CHLORIDE pipe
- PLASTICIZED POLYVINYL CHLORIDE pipe
- POLYVINYL CHLORIDE pipe
Correct Answer

A. UNPLASTICIZED POLYVINYL CHLORIDE pipe

Explanation

uPVC stands for Unplasticized Polyvinyl Chloride pipe. This type of pipe is made from a rigid form of PVC that does not contain any plasticizers. Plasticizers are chemicals added to PVC to make it more flexible and easier to mold. By not including plasticizers, uPVC pipes are stronger, more durable, and resistant to chemicals and weathering. They are commonly used for plumbing and drainage systems due to their excellent properties and long lifespan.

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2
4.
1. To insure no leakage, a G.I. pipe when threaded has to use lead liquid or ______ tape around the thread before tightening the fittings.
- Solvent
- Teflon
- Packaging
- Electrical
Correct Answer

A. Teflon

Explanation

To ensure no leakage, a G.I. pipe when threaded requires the use of lead liquid or teflon tape around the thread before tightening the fittings. Teflon tape is commonly used in plumbing applications as it provides a tight seal and prevents leaks. It is a thin, white tape made of polytetrafluoroethylene (PTFE) and is highly resistant to chemicals and heat. When wrapped around the threaded portion of the pipe, it fills in any gaps or imperfections, creating a secure and watertight connection.

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5.

Is plumbing system which carries water from the water source, street main or a pump to the building and to the various points in the building at which water is used
- Sewage System
- Water Supply and Distribution System
- Drainage System
- Non of the above
Correct Answer

A. Water Supply and Distribution System

Explanation

The correct answer is Water Supply and Distribution System. This system is responsible for carrying water from the source to the building and distributing it to various points within the building where water is used. It includes pipes, valves, pumps, and other components that ensure the proper flow and distribution of water for domestic or commercial purposes. The sewage system is responsible for the disposal of wastewater, while the drainage system deals with the removal of rainwater or excess water from the building.

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1
6.

Its is The ability to absorb heat without becoming warmer
- SURFACE TENSION
- HEAT ABSOPTION/CAPACITY
- CAPILLARITY
- DISSOLVING ABILITY
Correct Answer

A. HEAT ABSOPTION/CAPACITY

Explanation

Heat absorption/capacity refers to the ability of a substance or material to absorb heat without experiencing a significant increase in temperature. This means that even when heat is applied to the substance, it does not become warmer. This property is important in various applications, such as in cooling systems or insulating materials, where the substance needs to absorb heat efficiently without getting hotter itself.

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7.

Which is not one of the components of plumbing?
- Water Supply Distribution System
- Sanitary Drainage and Disposal System
- Storm Drainage System
- Electrical Piping System
- All of the above
Correct Answer

A. Electrical Piping System

Explanation

The electrical piping system is not one of the components of plumbing. Plumbing typically refers to the system of pipes and fixtures that carry water and sewage, and the electrical piping system is not directly related to this. It is a separate system that deals with the installation of electrical wiring and conduits for power distribution.

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8.

Excessive pressure produces a rumbling sound called the ____________
- Water hammer
- Water pressure
- Water desimination
Correct Answer

A. Water hammer

Explanation

Excessive pressure in a water system can cause a phenomenon known as water hammer. This occurs when the flow of water is suddenly stopped or redirected, causing a shock wave that travels through the pipes and creates a rumbling or banging sound. This can be caused by various factors such as closing a valve too quickly or a sudden change in water velocity. Water hammer can be damaging to pipes and fittings, and it is important to address the issue to prevent further damage.

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4
9.

In 1935, this the only group/ organization for plumbing works and ordinaces
- NAMPAP
- NAPAP
- DILG
- DENR
Correct Answer

A. NAMPAP

Explanation

NAMPAP is the correct answer because it stands for the National Association of Master Plumbers and Allied Products. In 1935, it was the only group or organization that focused on plumbing works and ordinances. The other options, NAPAP, DILG, and DENR, do not specifically pertain to plumbing and are not relevant to the given context.

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2
10.

This is a kind of pump attached to the end of deep well pipe enclosed in a casing where the pump is capable of functioning while submerged.
- Force pump
- Submersible pump
- Lift pump
Correct Answer

A. Submersible pump

Explanation

A submersible pump is a type of pump that is designed to be attached to the end of a deep well pipe and function while submerged. It is enclosed in a casing to protect it from water damage. Unlike other types of pumps, a submersible pump does not need to be primed or positioned above the water level to operate effectively. Instead, it is able to draw water from deep within the well and pump it to the surface. This makes it a convenient and efficient option for pumping water from deep wells.

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1
11.

Water is sprayed into the air to release any trapped gases and absorb additional oxygen for better taste.
- Aeration
- Sedimentation
- Chlorination
- Filtration
Correct Answer

A. Aeration

Explanation

Water is sprayed into the air to release any trapped gases and absorb additional oxygen for better taste. Aeration helps to improve the taste and odor of water by removing volatile compounds and gases such as hydrogen sulfide and methane. It also helps to oxidize and remove dissolved iron and manganese, which can cause discoloration and unpleasant taste. Aeration is commonly used in water treatment processes to enhance the quality of drinking water.

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12.

________ are holes in the earth from which a fluid may be withdrawn using manual or mechanical means such as draw bucket,pump,etc.
- WELLS
- PITS
- FOX HOLES
- NON OF THE ABOVE
Correct Answer

A. WELLS

Explanation

Wells are holes in the earth that can be used to withdraw fluid, such as water, using manual or mechanical methods like a draw bucket or pump. This makes them a suitable answer for the question. Pits and fox holes are not typically used for withdrawing fluids, so they are not the correct answer.

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13.

1. What does PE pipe stands for?
- A. polyethylene pipe
- B. polythylene pipe
- C. polyvinyl extra pipes
- D. plastics extra pipe
Correct Answer

A. A. polyethylene pipe

Explanation

PE pipe stands for polyethylene pipe. Polyethylene is a type of plastic that is commonly used in the manufacturing of pipes. It is known for its durability, flexibility, and resistance to corrosion. PE pipe is widely used in various industries, including water supply, gas distribution, and irrigation systems. It is a cost-effective and reliable choice for transporting fluids and is often preferred over other types of pipes due to its long lifespan and low maintenance requirements.

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14.

Water cycle is consists of 3 stages of process, which is not included
- Evaporation
- Condensation
- Precipitation
- Hydration
Correct Answer

A. Hydration
15.

What can discharge directly to the sewer system
- Building Sewer
- Oil and Grease
- Ashes
- Non of the above
Correct Answer

A. Building Sewer

Explanation

The building sewer can discharge directly to the sewer system. Other options like oil and grease and ashes cannot be discharged directly to the sewer system as they can cause clogs and blockages. Therefore, the correct answer is building sewer.

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16.

. Water is treated by giving ________________ to kill the harmful bacteria present and to cure the turbid taste or “mud taste”, remove clay, salts, iron, etc. commonly used treating liquids is chlorine.
- Chemical powder
- Chemical treatments
- Bacteria
Correct Answer

A. Chemical treatments

Explanation

Water is treated by using chemical treatments to kill harmful bacteria and improve its taste. One commonly used chemical treatment is chlorine, which helps to remove clay, salts, iron, and other impurities.

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17.

NAMPAP means?
- National Master Peon Association of the Philippines
- National Master Plumbers Association of the Philippines
- National Multi Plumbing Associate of the Philippines
- None of the above
Correct Answer

A. National Master Plumbers Association of the Philippines

Explanation

The correct answer is "National Master Plumbers Associations of the Philippines." This is because the acronym "NAMPAP" stands for an organization related to plumbing, and the only option that includes the word "plumbers" is the second one, "National Master Plumbers Associations of the Philippines."

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0
18.
1. These valves are used when it is desired that the flow through a pipe be always in one direction and there is a possibility of a flow taking place in the opposite direction. One type has a pivoted flap which is readily pushed open by the pressure of water from one side but is tightly closed by the force of a reverse flow.
- Gatevalves
- Checkvalves
- Globe valves
Correct Answer

A. Checkvalves

Explanation

Check valves are used when it is desired to have a one-directional flow in a pipe. They have a pivoted flap that can easily be pushed open by the pressure of water from one side, allowing flow in that direction. However, when there is a reverse flow, the force of the water tightly closes the flap, preventing flow in the opposite direction. This makes check valves suitable for preventing backflow and ensuring that the flow remains in one direction.

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19.

1. The location of a fire hose cabinet connected to a standpipe for buildings shall be at every floor level above the first floor at:
- A. storeroom
- B. inside a mechanical/electrical room
- C. a landing of an enclosed stairway
- D. at any private room or rentable space
Correct Answer

A. C. a landing of an enclosed stairway

Explanation

The correct answer is C. a landing of an enclosed stairway. This is because a fire hose cabinet connected to a standpipe should be easily accessible in case of a fire emergency. Placing it at a landing of an enclosed stairway ensures that it is centrally located and easily visible to occupants on each floor. This location also allows for quick and convenient access to the fire hose in case it is needed to extinguish a fire.

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20.

Plays an important part in the plumbing system, providing this is the most critical utility requirement, and also known as a "Universal Solvent"
- Sewage
- Water
- Chloride
- Purified water
Correct Answer

A. Water

Explanation

Water plays an important part in the plumbing system as it is the most critical utility requirement. It is also known as the "Universal Solvent" because it has the ability to dissolve a wide variety of substances. Water is essential for various purposes such as drinking, cleaning, cooking, and sanitation. It is used for flushing toilets, bathing, washing dishes, and many other daily activities. Without water, the plumbing system would not function effectively, and many essential tasks would be impossible to carry out.

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21.

Properties of water, that can dissolved everything , Known as the “Universal Solvent”
- SURFACE TENSION
- HEAT ABSOPTION/CAPACITY
- CAPILLARITY
- DISSOLVING ABILITY
Correct Answer

A. DISSOLVING ABILITY

Explanation

Water is known as the "Universal Solvent" because of its high dissolving ability. This means that water has the ability to dissolve a wide variety of substances, including both polar and nonpolar compounds. This is due to the unique structure of water molecules, which have a slightly positive charge on the hydrogen atoms and a slightly negative charge on the oxygen atom. This polarity allows water molecules to attract and surround other molecules, breaking them apart and forming new bonds. As a result, water is able to dissolve many different substances, making it an excellent solvent.

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1
22.

And the horizontal pipes that serve the faucets are called _______
- Branches
- Vent pipe
- Riser
- Stack vent
Correct Answer

A. Branches

Explanation

The horizontal pipes that serve the faucets are called "branches" because they branch off from the main vertical pipe and distribute water to the different fixtures in a plumbing system. These branches connect to the faucets and allow water to flow through them.

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1
23.

There is a septic tank installed on the top of a rock by the 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.
- Water proof all surface, exterior and interior
- Water proof all interior surface except the floor
- Water proof the walls only exterior and interior
- Non of the above
Correct Answer

A. Water proof all surface, exterior and interior

Explanation

The septic tank is exposed to sea water during high tide, which means it will be constantly in contact with water. Therefore, it is necessary to waterproof all surfaces, both exterior and interior, to prevent any water leakage or damage to the tank. Waterproofing only the interior surfaces except the floor or only the walls would not provide sufficient protection against the constant exposure to sea water.

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24.

1. Any pipe in the plumbing system provided to ventilate a house drainage system and to prevent trap siphonage and back pressure.
- A. waste pipe
- B. vent pipe
- C. soil pipe
- D. house trap
Correct Answer

A. B. vent pipe

Explanation

A vent pipe is a pipe in the plumbing system that is used to ventilate a house drainage system and prevent trap siphonage and back pressure. It allows air to enter the pipes, which helps to equalize pressure and prevent water from being siphoned out of traps or creating pressure that could damage the system. The vent pipe plays an important role in maintaining the proper functioning of the plumbing system and ensuring that waste water flows properly.

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1
25.

. The vertical supply pipe which extends upward from one floor to the next is called a_________
- Service pipe
- Riser
- Vent
- Stack vent
Correct Answer

A. Riser

Explanation

A vertical supply pipe that extends upward from one floor to the next is called a riser. This pipe is responsible for delivering water or other fluids to the different levels of a building. It allows for efficient distribution of resources and ensures that each floor has access to the necessary supply.

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26.

A_______ is water equipment used whenever the water supply at its natural pressure cannot be directly piped to a building, tank or reservoir.
- Pump
- Tank
- Motor
- Bibb
Correct Answer

A. Pump

Explanation

A pump is used whenever the water supply at its natural pressure cannot be directly piped to a building, tank, or reservoir. Pumps are designed to increase the pressure of the water, allowing it to be transported to the desired location. They are essential in situations where the natural water pressure is insufficient to meet the needs of the building or storage facility. Pumps come in various types and sizes, depending on the specific requirements of the system.

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3
27.

PA ________is a device used to move fluids, such as liquidsor slurries.A MECHANICAL EQUIPMENT displaces a volume by physical or mechanical action.
- PUMP
- MOTOR
- PROPELLER
- MACHINE
Correct Answer

A. PUMP

Explanation

A pump is a device used to move fluids, such as liquids or slurries. It displaces a volume by physical or mechanical action.

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28.

This is a portion of the rain water which has percolated into the earth to form underground deposits
- Aquifers
- Well
- Cistern
- Soil bearing
Correct Answer

A. Aquifers

Explanation

Aquifers are underground deposits of water formed when rainwater percolates into the earth. These underground reservoirs are made up of porous rocks, gravel, or sand that can hold and transmit water. Aquifers are an important source of groundwater, supplying wells and springs with water. They play a crucial role in sustaining ecosystems and providing water for human consumption, agriculture, and industrial use.

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29.
1. One end is 0.30M and the other end is 0.90M long. This prevents the pipe from snapping (breaking?)when the soil settles. [U-shaped?]
- Gooseneck
- Corporation cock
- Ball cock
- Long neck
Correct Answer

A. Gooseneck

Explanation

A gooseneck is a curved pipe or tube that is commonly used in plumbing to create a U-shape. In this context, a gooseneck is used to prevent the pipe from snapping or breaking when the soil settles. The length of the gooseneck is not mentioned, but it is implied that it is longer than the pipe itself, with one end being 0.30M and the other end being 0.90M long. Therefore, the gooseneck is the correct answer as it fits the description provided.

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30.

Chemical process in which the coagulant reacts with the sediment to make it capable of combining into larger particles.
- COAGULATION
- FLOCCULATION
- SEDIMENTATION
- AERATION
Correct Answer

A. COAGULATION

Explanation

Coagulation is the correct answer because it is a chemical process where the coagulant, a substance that promotes the clumping of particles, reacts with the sediment. This reaction makes the sediment capable of combining into larger particles, which aids in their removal from the water. Coagulation is an important step in water treatment processes to remove impurities and improve water quality.

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2
31.

Is any method that will remove one or more materials that make the water unsuitable for a given use
- Water Sedimentation
- Water Treatment
- Water boiling
- Non of the above
Correct Answer

A. Water Treatment

Explanation

Water treatment is the correct answer because it refers to the process of removing contaminants or undesirable substances from water to make it safe and suitable for a specific purpose. This can involve various methods such as filtration, disinfection, sedimentation, and chemical treatments. Water sedimentation is a specific process within water treatment that involves allowing suspended particles to settle at the bottom of a container. Water boiling, on the other hand, is a method of disinfection but does not necessarily remove all contaminants. Therefore, water treatment is the most appropriate method for removing materials that make water unsuitable for use.

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2
32.

Requires more elaborate equipment depending on the geology of the site.Used for drilling oil and can reach up to 1000 meters in depth.
- BORED WELLS
- DRILLED WELLS
- SHORE WELLS
- DUG WELLS
Correct Answer

A. DRILLED WELLS

Explanation

Drilled wells are the correct answer because they require more elaborate equipment depending on the geology of the site and can reach depths of up to 1000 meters. Bored wells are typically shallow and dug by hand or machine, while shore wells are typically located near bodies of water. Dug wells are also shallow and are created by digging into the ground. Therefore, the only option that fits the given description is drilled wells.

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33.

Suspended solids are removed from the water by gravity settling and depositionwater is passed through basins so sediments can settle through a period of time
- COAGULATION
- FLOCCULATION
- SEDIMENTATION
- AERATION
Correct Answer

A. SEDIMENTATION

Explanation

Suspended solids in water can be removed through the process of sedimentation. This involves allowing the water to pass through basins or tanks where the sediments can settle over time due to gravity. The force of gravity causes the heavier particles to sink to the bottom, leaving cleaner water above. This process is effective in removing larger particles and sediments from the water, resulting in clearer and cleaner water.

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34.

This consists of a wedge-shaped plug which is screwed down to seat between two brass rings surrounding the inlet pipe so that a double seal is obtained. The inlet and outlet are in a straight line. This valve is used when a normal fully open or closed position is desired. Either end may be used as inlet
- Gatevalves
- Checkvalves
- Globe valves
Correct Answer

A. Gatevalves

Explanation

Gate valves are used when a normal fully open or closed position is desired. They consist of a wedge-shaped plug that is screwed down to seat between two brass rings surrounding the inlet pipe, creating a double seal. The inlet and outlet are in a straight line, and either end can be used as the inlet. Gate valves are commonly used in plumbing systems to control the flow of fluids.

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35.

To reduce water hammer?
- Put noise reduction insulation to absorb noise that will be created by the pipes
- An additional 0.30m to 0.90m length of pipe is added to the riser to give air pressure which absorb it.
- Addtional vent pipe
Correct Answer

A. An additional 0.30m to 0.90m length of pipe is added to the riser to give air pressure which absorb it.

Explanation

Adding an additional 0.30m to 0.90m length of pipe to the riser creates a cushion of air pressure that helps absorb the water hammer effect. When there is a sudden change in water flow or direction, such as when a valve is closed quickly, it can create a pressure surge that causes the pipes to vibrate and produce noise. By adding this extra length of pipe, the air pressure acts as a buffer, absorbing the pressure surge and reducing the water hammer effect.

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36.

1. A female GI threaded pipe reducer fitting use to connect a reducing branch pipe at an angle.
- A. Elbow reducer
- B. Bushing reducer
- C. Coupling reducer
- D. Tee reducer
Correct Answer

A. A. Elbow reducer

Explanation

The correct answer is A. Elbow reducer. An elbow reducer is a type of threaded pipe fitting that is used to connect a reducing branch pipe at an angle. It is called an elbow because it has a curved shape, resembling the angle of an elbow. This fitting is commonly used in plumbing and pipe systems to redirect the flow of fluids or gases.

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37.

Water is purified by ___________. In various processes, so as to remove the particles of vegetable matter, mud and other particles of matter present in the water, most commonly used materials are sand and gravel.
- Filtration
- Purification
- Sedimentation
Correct Answer

A. Filtration

Explanation

Water is purified by filtration in order to remove particles of vegetable matter, mud, and other impurities present in the water. Filtration involves passing the water through a porous material such as sand and gravel, which traps and removes the solid particles. This process helps to improve the clarity and quality of the water, making it safe for consumption and other uses.

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38.
1. A kind of G.I. fitting that has one end external threads, while the other end has internal threads.
- STREET ELBOW or TEE
- Wye
- Elbow
Correct Answer

A. STREET ELBOW or TEE

Explanation

The correct answer is "STREET ELBOW or TEE" because both of these fittings have one end with external threads and the other end with internal threads. These fittings are commonly used in plumbing and piping systems to connect pipes at a 90-degree angle while allowing for easy installation and disassembly. The term "street elbow" refers to a fitting that has male threads on one end and female threads on the other, while a "tee" fitting has three openings and can be used to create a branch in a pipe system.

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39.

Acidity is one of the most problems in water distribution and water purification, which can cause Corrosion of non-ferrous pipes and Rusting & clogging of steelpipes, which is the best solution for this problem?
- Passing the water through a bed of crushed marble or limestone to achieve alkalinity, or adding sodium silicate.)
- Chlorination for removing salt contents
- Aeration
- Non of the above
Correct Answer

A. Passing the water through a bed of crushed marble or limestone to achieve alkalinity, or adding sodium silicate.)

Explanation

Passing the water through a bed of crushed marble or limestone to achieve alkalinity, or adding sodium silicate is the best solution for the problem of acidity in water distribution and water purification. This process helps to neutralize the acid content in the water, preventing corrosion of non-ferrous pipes and rusting and clogging of steel pipes. By increasing the alkalinity of the water, it reduces the corrosive properties and protects the pipes from damage. Additionally, adding sodium silicate can also help in stabilizing the pH level of the water, further preventing acidity-related issues.

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40.

Jet pumps are centrifugal pumps typically used for drawing water up from a well.
- SUBMERSIBLE PUMP
- TURBINE PUMP
- JET (EJECTOR) PUMP
- RECIPROCATING PUMP
Correct Answer

A. JET (EJECTOR) PUMP

Explanation

Jet (ejector) pumps are commonly used for drawing water up from a well. These pumps work by creating a vacuum in a chamber, which then draws water up from the well through a nozzle. The high velocity of the water exiting the nozzle creates a low pressure area, causing water to be drawn up from the well and into the pump. This type of pump is efficient and reliable for well applications, making it a suitable choice for this purpose.

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41.

This pumps are used in applications where excess water must be pumped away from a particular area.a pump used to remove water that has accumulated in a water collecting sumppit,
- JET (EJECTOR) PUMP
- SUMP PUMP
- TURBINE PUMP
- PISTON PUMP
Correct Answer

A. SUMP PUMP

Explanation

A sump pump is used to remove water that has accumulated in a water collecting sump pit. It is typically used in applications where excess water needs to be pumped away from a specific area. Sump pumps are commonly found in basements or crawl spaces to prevent flooding or water damage. They are designed to automatically activate when water reaches a certain level in the sump pit and pump the water out to a safe location, such as a drainage system or a designated area away from the property.

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42.

This water source is often in springs and wells as a source of water
- Ground water
- Rain water
- Natural Water
- Non of the above
Correct Answer

A. Ground water

Explanation

Groundwater is the correct answer because it refers to water that is stored beneath the Earth's surface in underground aquifers and is often found in springs and wells. It is a reliable source of water as it is replenished by precipitation and can be accessed through drilling or pumping. Rainwater is not the correct answer as it refers to water that falls from the atmosphere as precipitation. Natural water is a vague term and does not specifically refer to groundwater. Therefore, the correct answer is groundwater.

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43.

Is a positive displacement reciprocating pump in which a plunger is driven backwards and forwards, or up and down by a mechanical working head.Water is sucked into a sealed vacuum by use of a piston.
- PISTON PUMP PISTON PUMP
- RECIPROCATING PUMP
- JET (EJECTOR) PUMP
- TURBINE PUMP
Correct Answer

A. PISTON PUMP PISTON PUMP

Explanation

A piston pump is a type of positive displacement reciprocating pump where a plunger is driven backwards and forwards by a mechanical working head. It creates a sealed vacuum to suck water into the pump through the use of a piston. This type of pump is commonly used in various applications where a consistent flow of fluid is required.

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4
44.

The ability to stick itself together and pull itself together
- SURFACE TENSION
- HEAT ABSOPTION/CAPACITY
- CAPILLARITY
- DISSOLVING ABILITY
Correct Answer

A. SURFACE TENSION

Explanation

Surface tension is the correct answer because it refers to the property of a liquid that allows it to stick to itself and pull itself together. Surface tension is caused by the cohesive forces between the liquid molecules, which create a "skin" on the surface of the liquid. This property is responsible for phenomena such as the formation of droplets, the ability of insects to walk on water, and the capillary action in plants.

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45.

What is the best fixture for a public comfort room
- Gatevalve
- Flushometer
- Faucet
- Non of the above
Correct Answer

A. Flushometer

Explanation

flushometer- A device for flushing toilets and urinals that utilizes pressure from the water supply system rather than the force of gravity to discharge water into the bowl, designed to use less water than conventional flush toilets.

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1
46.

1. The term used to the main water pipe delivering potable water to a building is called
- A. Water service pipe
- B. NAWASA
- C. Main pipe
- D. Water utility pipe
Correct Answer

A. A. Water service pipe

Explanation

The term used to refer to the main water pipe delivering potable water to a building is called the water service pipe. This pipe is responsible for supplying clean and drinkable water to the entire building. It is an essential component of the water distribution system and ensures that water reaches every faucet and fixture within the building.

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47.

The other physical properties of water is ability to climb up a surface against the pull of gravity
- SURFACE TENSION
- HEAT ABSOPTION/CAPACITY
- CAPILLARITY
- DISSOLVING ABILITY
Correct Answer

A. CAPILLARITY

Explanation

Capillarity refers to the ability of a liquid, in this case water, to climb up a surface against the pull of gravity. This is due to the cohesive forces between water molecules, which create surface tension. Capillarity is important in many natural processes, such as the movement of water through plants and the absorption of water by soil. It allows water to be transported efficiently and effectively in various systems.

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48.

. By gravity, water is distributed from overhead water tanks and is supported either by structural frames or on the roof decks. Fixtures are below the gravity tank. These elevated tanks are installed when normal water supply from main public service pipes is not frequent and when normal pressure from city main is not enough to force the water to the highest fixtures.
- UPFEED SYSTEM
- DOWN FEED SYSTEM
- PRESSURE SYSTEM
- DIRECT SYSTEM
Correct Answer

A. DOWN FEED SYSTEM

Explanation

A down feed system is the correct answer because it describes a water distribution system where water is supplied from an overhead tank and flows downward to the fixtures. This system is used when the water supply from the main pipes is not frequent and the pressure from the city main is not sufficient to reach the highest fixtures.

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49.

1. A female GI pipe reducer fitting used in a straight pipe connection where the fitting’s both ends are threaded inside
- A. coupling reducer
- B. bushing reducer
- C. elbow reducer
- D. tee reducer
Correct Answer

A. A. coupling reducer

Explanation

A female GI pipe reducer fitting is used in a straight pipe connection where the fitting's both ends are threaded inside. The correct term for this type of fitting is a coupling reducer. A coupling is a type of fitting that is used to connect two pipes of the same diameter together in a straight line. The reducer part of the fitting indicates that it is used to reduce the size of the pipe, typically from a larger diameter to a smaller diameter. Therefore, the correct answer is A. coupling reducer.

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