Building Utilities Architecture Quiz! Exam

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  • 1/50 Questions

    Conveys stormwater and terminates into natural drainages such as lakes or rivers.

    • Storm sewer
    • Main sewer
    • Distribution sewer
    • Canals
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About This Quiz

The 'Building Utilities Architecture Quiz! Exam' assesses knowledge on systems like storm sewers and air conditioning, focusing on technical aspects such as electrical generators and plumbing requirements. It's designed for learners in architecture and engineering, enhancing practical understanding of building utilities management.

Building Utilities Architecture Quiz! Exam - Quiz

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  • 2. 

    A machine that converts mechanical energy into electrical energy, a generator of alternating current.

    • Thermostat

    • Generator

    • Alternator

    • Motor

    Correct Answer
    A. Alternator
    Explanation
    An alternator is a machine that converts mechanical energy into electrical energy, specifically generating alternating current. Unlike a generator, which can produce either alternating or direct current, an alternator is specifically designed to produce alternating current. Therefore, the correct answer is alternator.

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  • 3. 

    Freon in air-con must be compressed and liquefied in order to absorb ___.

    • Heat

    • Moisture

    • Air

    • Water

    Correct Answer
    A. Heat
    Explanation
    Freon in air-conditioning systems acts as a refrigerant, and in order to effectively absorb heat from the surrounding air, it needs to be compressed and liquefied. This process allows the Freon to change from a gas to a liquid state, making it more efficient at absorbing heat. Therefore, the correct answer is heat.

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  • 4. 

    The standard size of a wet standpipe outlet for each floor.

    • 2"

    • 1 1/4"

    • 1 1/2"

    • 1"

    Correct Answer
    A. 1 1/2"
    Explanation
    The standard size of a wet standpipe outlet for each floor is 1 1/2". This size is commonly used to ensure an adequate water supply for firefighting purposes. It allows for a sufficient flow of water to reach higher floors and can accommodate the demand for water during an emergency. The larger size also helps to minimize pressure loss and maintain an effective firefighting system throughout the building.

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  • 5. 

    A type of pipe fitting for a Yoke Vent.

    • 1/4 bend

    • 1/8 bend

    • Wye

    • Cross tee

    Correct Answer
    A. 1/8 bend
    Explanation
    A 1/8 bend is a type of pipe fitting that is used for a Yoke Vent. It is a curved fitting that allows for a change in direction of the pipe by 45 degrees. This type of fitting is commonly used in plumbing systems to connect pipes at angles and ensure proper ventilation. It is smaller and has a tighter bend compared to a 1/4 bend, making it suitable for specific applications where a sharper turn is required.

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  • 6. 

    The minimum size of trap or branch for a bidet.

    • 3/8"

    • 1 1/2"

    • 1"

    • 1/2"

    Correct Answer
    A. 1 1/2"
    Explanation
    The minimum size of trap or branch for a bidet is 1 1/2". This means that the trap or branch connecting the bidet to the plumbing system should have a diameter of 1 1/2 inches. This size is necessary to ensure proper flow and drainage of waste water from the bidet.

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  • 7. 

    A term applied to the interconnection of the same fixtures in one soil or waste branch with one branch vent.

    • Union

    • Battery of fixtures

    • Connection of fixtures

    • Series

    Correct Answer
    A. Battery of fixtures
    Explanation
    The term "battery of fixtures" refers to the interconnection of the same fixtures in one soil or waste branch with one branch vent. This means that multiple fixtures, such as toilets or sinks, are connected together in a series, sharing the same soil or waste branch and vent. This arrangement allows for efficient drainage and ventilation of the fixtures.

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  • 8. 

    A single vent that ventilates multiple traps in the case of a back to back vent.  

    • Relief vent

    • Common vent

    • Loop vent

    • Circuit vent

    Correct Answer
    A. Common vent
    Explanation
    A common vent is a single vent that is used to ventilate multiple traps in the case of a back to back vent. This means that instead of having separate vents for each trap, they are all connected to a common vent, which helps to improve the efficiency of the ventilation system. By using a common vent, it reduces the number of vents needed and simplifies the plumbing system.

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  • 9. 

    The minimum size of a standpipe for a building in which the highest outlet is 23 meters or less from the fire service connection.

    • 4"

    • 3"

    • 2"

    • 1"

    Correct Answer
    A. 4"
    Explanation
    The minimum size of a standpipe for a building with the highest outlet 23 meters or less from the fire service connection is 4". This means that the standpipe must have a diameter of 4 inches. Standpipes are used to provide a water supply for firefighters during emergencies, and the larger diameter ensures an adequate flow of water to reach the highest outlet in the building efficiently.

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  • 10. 

    The minimum size of a wet standpipe for a riser of more than 15 meters from the source.  

    • 1"

    • 2"

    • 3"

    • 4"

    Correct Answer
    A. 4"
    Explanation
    The minimum size of a wet standpipe for a riser of more than 15 meters from the source is 4". This is because a wet standpipe is a pipe system that is constantly filled with water and is used for firefighting purposes. A riser refers to the vertical pipe that connects the standpipe system to the source of water. In order to ensure an adequate flow of water to reach a height of more than 15 meters, a larger diameter pipe is required. A 4" diameter pipe would provide sufficient water flow and pressure for firefighting operations in this scenario.

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  • 11. 

    Single lever valves used in the kitchen sink and lavatory faucets or at shower valves work by the principle of a ___.  

    • Ball valve

    • Gate valve

    • Angular valve

    • Check valve

    Correct Answer
    A. Ball valve
    Explanation
    Single lever valves used in kitchen sink and lavatory faucets or shower valves work by the principle of a ball valve. A ball valve has a hollow, perforated ball inside it that controls the flow of water. When the lever is turned, the ball rotates to either block or allow the flow of water through the valve. This design provides a reliable and easy-to-use mechanism for controlling the water flow, making it a popular choice for household faucets and shower valves.

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  • 12. 

    Minimum height of a branch vent above the fixture it is venting.

    • 5"

    • 6"

    • 2"

    • 4"

    Correct Answer
    A. 6"
    Explanation
    The minimum height of a branch vent above the fixture it is venting is 6". This is important in plumbing systems to ensure proper venting and prevent any potential backflow or blockages. By having the branch vent positioned higher than the fixture, it allows for adequate air circulation and pressure equalization, promoting smooth drainage and preventing any potential issues.

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  • 13. 

    Treats hard water.  

    • Perlite

    • Vermiculite

    • Zeolite

    • Granite

    Correct Answer
    A. Zeolite
    Explanation
    Zeolite is a mineral that is commonly used to treat hard water. Hard water contains high levels of minerals such as calcium and magnesium, which can cause scaling and reduce the effectiveness of soaps and detergents. Zeolite has a unique structure that allows it to exchange these minerals for sodium ions, effectively softening the water. It acts as a natural water softener and can improve the quality of water for various purposes such as drinking, bathing, and washing clothes. Therefore, zeolite is the correct answer as it is specifically known for its ability to treat hard water.

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  • 14. 

    Minimum wire size in square millimeter for a branch circuit with a 30-ampere rating using Type THW stranded copper conductor in a raceway.  

    • 1.5 sqmm

    • 2 sqmm

    • 4.5 sqmm

    • 5.5 sqmm

    Correct Answer
    A. 5.5 sqmm
    Explanation
    The correct answer is 5.5 sqmm because the National Electrical Code (NEC) requires that the minimum wire size for a branch circuit with a 30-ampere rating should be 10 AWG (American Wire Gauge), which is equivalent to approximately 5.5 sqmm for stranded copper conductors. This wire size is necessary to ensure that the wire can safely carry the current without overheating and causing a fire hazard.

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  • 15. 

    Standard frequency of power supplied by the local power utility company like Meralco.  

    • 50 cycles

    • 60 cycles

    • 40 cycles

    • 30 cycles

    Correct Answer
    A. 60 cycles
    Explanation
    The standard frequency of power supplied by the local power utility company like Meralco is 60 cycles. This frequency, also known as the frequency of alternating current (AC), represents the number of complete cycles or oscillations that occur in one second. In many countries, including the Philippines where Meralco operates, the standard frequency for AC power is 60 cycles per second, or 60 hertz (Hz). This frequency is chosen for efficient transmission and distribution of electrical power, as well as compatibility with electrical appliances and equipment commonly used in residential, commercial, and industrial settings.

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  • 16. 

    The overhead service conductors from the last pole or other aerial support to and including splices, if any, connecting to the service entrance conductors at the building.  

    • Service drop

    • Service cap

    • Service entrance

    • Service conductor

    Correct Answer
    A. Service drop
    Explanation
    The term "service drop" refers to the overhead service conductors that run from the last pole or aerial support to the building's service entrance conductors. This includes any splices that connect the service drop to the service entrance conductors. Essentially, the service drop is the portion of the electrical system that delivers power from the utility lines to the building.

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  • 17. 

    Unit of loudness level.  

    • Sabin

    • Phon

    • Farad

    • Watts

    Correct Answer
    A. Phon
    Explanation
    The unit of loudness level is phon. Phon is a unit used to measure the subjective loudness of a sound. It is based on the human perception of sound and takes into account factors such as frequency and intensity. The loudness level of a sound is measured in phons to determine how loud it appears to the human ear.

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  • 18. 

    Distance sound travels during each cycle of vibration.  

    • Wavelength

    • Sound absorption

    • Frequency

    • Nota

    Correct Answer
    A. Wavelength
    Explanation
    The distance sound travels during each cycle of vibration is determined by its wavelength. Wavelength is the distance between two corresponding points on a sound wave, such as the distance between two crests or two troughs. As sound waves propagate, they undergo cycles of compression and rarefaction, with each cycle representing one complete vibration. The wavelength of a sound wave is directly related to its frequency, with longer wavelengths corresponding to lower frequencies and shorter wavelengths corresponding to higher frequencies. Therefore, the correct answer is wavelength.

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  • 19. 

    The process of dissipating sound energy by converting it to heat.  

    • Soundwave

    • Wavelength

    • Sound absorption

    • Appurtenance

    Correct Answer
    A. Sound absorption
    Explanation
    Sound absorption is the correct answer because it refers to the process of dissipating sound energy by converting it to heat. When sound waves encounter a material that has good sound absorption properties, such as foam or acoustic panels, the energy of the sound waves is converted into heat energy, reducing the intensity and reverberation of the sound. This is commonly used in places like recording studios, concert halls, and offices to improve the acoustics and reduce noise levels.

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  • 20. 

    The reduction in the intensity or in the sound pressure level of sound is transmitted from one point to another.  

    • Sabin

    • Sound attenuation

    • Wavelength

    • Farad

    Correct Answer
    A. Sound attenuation
    Explanation
    Sound attenuation refers to the reduction in the intensity or sound pressure level of sound as it is transmitted from one point to another. It occurs due to various factors such as distance, absorption, scattering, and reflection of sound waves. Sound attenuation is important in various applications, such as reducing noise pollution and improving sound quality in audio systems.

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  • 21. 

    Unit of sound absorption equivalent to 1 square foot of perfectly absorptive material.  

    • Phon

    • Watt

    • Farad

    • Sabin

    Correct Answer
    A. Sabin
    Explanation
    A sabin is a unit of sound absorption that measures the amount of sound absorbed by a material. It is equivalent to the absorption of one square foot of perfectly absorptive material. This unit is commonly used in acoustics to quantify the effectiveness of soundproofing materials or the sound absorption capabilities of a room or space.

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  • 22. 

    Acoustical phenomenon which causes sound wave to be bent or scattered around.  

    • Diffusion

    • Acoustical diffraction

    • Absorption

    • Sound wave

    Correct Answer
    A. Acoustical diffraction
    Explanation
    Acoustical diffraction is the phenomenon that causes sound waves to be bent or scattered around obstacles. When a sound wave encounters an obstacle, such as a wall or a corner, it can diffract or spread out in different directions. This bending or scattering of the sound wave allows it to reach areas that would otherwise be in its shadow. Diffraction is an important factor in understanding how sound propagates in different environments, and it plays a crucial role in fields such as architectural acoustics and outdoor sound propagation.

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  • 23. 

    Minimum sound pressure level that is capable of being detected by the human ear.  

    • Threshold of inaudibility

    • Threshold of pain

    • Threshold of audibility

    • Nota

    Correct Answer
    A. Threshold of audibility
    Explanation
    The correct answer is "threshold of audibility." This refers to the minimum sound pressure level that the human ear can detect. It is the point at which a sound becomes just barely audible to a person. The threshold of audibility varies for different individuals, but on average, it is around 0 decibels. This means that any sound below this level would not be heard by the human ear.

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  • 24. 

    Fluctuation in pressure, a particle displacement in an elastic medium.  

    • Sound

    • Wavelength

    • Phon

    • Tune

    Correct Answer
    A. Sound
    Explanation
    Sound is a form of energy that travels in waves through an elastic medium, such as air, water, or solids. These waves cause fluctuations in pressure, which in turn cause particles in the medium to vibrate or displace from their equilibrium position. This particle displacement is what allows sound waves to propagate and be heard. Therefore, the given correct answer "sound" accurately describes the phenomenon of fluctuation in pressure and particle displacement in an elastic medium.

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  • 25. 

    Sound sensation in a single frequency.  

    • Wave tone

    • Sine tone

    • Pure tone

    • Nota

    Correct Answer
    A. Pure tone
    Explanation
    A pure tone refers to a sound sensation that consists of a single frequency. It does not contain any additional frequencies or harmonics. This means that the sound wave produced by a pure tone is a simple sine wave, without any complex patterns or variations. Pure tones are often used in auditory research and testing, as they allow for precise measurement and analysis of specific frequencies and their effects on the human auditory system.

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  • 26. 

    The wave produced by a pure tone.  

    • Pure wave

    • Sine wave

    • Curved wave

    • Nota

    Correct Answer
    A. Sine wave
    Explanation
    A pure tone refers to a sound wave that consists of a single frequency and has no additional harmonics or overtones. A sine wave is the simplest form of a pure tone, characterized by a smooth and regular oscillation between positive and negative values. It represents a single frequency and is often used to represent the sound produced by a pure tone. Therefore, the answer "sine wave" is correct as it accurately describes the wave produced by a pure tone.

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  • 27. 

    The luminous intensity of light is expressed in ___.  

    • Lux

    • Candela

    • Lumen

    • Foot candle

    Correct Answer
    A. Candela
    Explanation
    The luminous intensity of light is expressed in candela. Candela is the SI unit for measuring the intensity of light emitted by a light source in a particular direction. It is defined as the luminous intensity in a given direction of a source that emits monochromatic radiation of frequency 540 x 10^12 hertz and has a radiant intensity in that direction of 1/683 watt per steradian.

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  • 28. 

    It refers to an individual who worked in the sanitary field of ancient Rome.

    • Plumber

    • Plumbarius

    • Plumbum

    • Plumplum

    Correct Answer
    A. Plumbarius
    Explanation
    The correct answer is "plumbarius." In ancient Rome, a plumbarius was an individual who worked in the sanitary field, specifically dealing with plumbing and water systems. The term is derived from the Latin word "plumbum," which means lead, as lead pipes were commonly used in plumbing during that time. Therefore, a plumbarius would have been responsible for the installation, maintenance, and repair of plumbing systems in ancient Rome.

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  • 29. 

    Vertical flow of air used to separate different functions of spaces.

    • Air curtain

    • Air wall

    • Air vent

    • Air circulation

    Correct Answer
    A. Air curtain
    Explanation
    An air curtain is a vertical flow of air that is used to separate different functions of spaces. It creates a barrier of air that helps to prevent the exchange of air, dust, insects, and pollutants between two areas. It is commonly used in commercial settings, such as doorways of restaurants or shops, to maintain indoor temperature, reduce energy loss, and improve air quality. The air curtain acts as an invisible barrier, allowing people and objects to pass through while still providing a separation between two spaces.

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  • 30. 

    Type of lighting dealing with relatively large area lighting.  

    • Outdoor lighting

    • Specific lighting

    • General lighting

    • Flood light

    Correct Answer
    A. General lighting
    Explanation
    General lighting is the type of lighting that deals with relatively large area lighting. It is designed to provide overall illumination and a comfortable level of brightness to a space. This type of lighting is commonly used in homes, offices, and commercial buildings to ensure that the entire area is well-lit and visible. General lighting fixtures are typically installed on ceilings or walls and can include recessed lights, track lights, or surface-mounted fixtures. Unlike specific lighting, which focuses on highlighting specific objects or areas, general lighting aims to evenly distribute light throughout the space.

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  • 31. 

    During an elevator emergency, to rescue passengers, this part of the elevator is used to open the doors from the outside.  

    • Fire exit

    • Outside door latch

    • Panic bar

    • Door latch

    Correct Answer
    A. Outside door latch
    Explanation
    During an elevator emergency, the outside door latch is used to open the doors from the outside in order to rescue passengers. This latch is specifically designed to be accessible and operable by emergency personnel or anyone outside the elevator, allowing them to gain entry and assist those trapped inside.

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  • 32. 

    A device that extends across at least 1/2 the width of each door leaf which will open if subjected to pressure.  

    • Panic bar

    • Mullion

    • Door latch

    • Keylock

    Correct Answer
    A. Panic bar
    Explanation
    A panic bar is a device that is installed on a door and extends across at least half of the width of each door leaf. It is designed to open the door when pressure is applied to it, allowing for quick and easy exit in emergency situations. This device is commonly used in public buildings and areas where a large number of people may need to evacuate quickly.

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  • 33. 

    Sanitary sewage from buildings shall be discharged directly to the nearest ___.  

    • Collector sewer

    • Sewer line

    • Main sanitary sewer

    • Storm drain

    Correct Answer
    A. Main sanitary sewer
    Explanation
    Sanitary sewage from buildings should be discharged directly to the nearest main sanitary sewer. This is because the main sanitary sewer is specifically designed to handle and transport sewage waste safely and efficiently. Discharging sewage into a collector sewer, sewer line, or storm drain may not be appropriate or environmentally friendly, as these systems may not be designed to handle sewage waste properly. Therefore, the main sanitary sewer is the most suitable option for the direct discharge of sanitary sewage from buildings.

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  • 34. 

    The simplest type of building automation system.

    • Hvac

    • Elevator system

    • Electrical system

    • Telecommunication system

    Correct Answer
    A. Telecommunication system
    Explanation
    A telecommunication system is the simplest type of building automation system because it primarily focuses on communication within the building. It facilitates the transmission of data, voice, and video signals, allowing different devices and systems to communicate with each other. While HVAC, elevator systems, and electrical systems are also important building automation systems, they involve more complex functionalities and operations compared to a telecommunication system.

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  • 35. 

    A vent pipe connected to a vent stack.  

    • Relief vent

    • Circuit vent

    • Loop vent

    • Nota

    Correct Answer
    A. Circuit vent
    Explanation
    A circuit vent is a pipe connected to a vent stack that provides additional venting to a circuit of connected fixtures. It helps to prevent excessive pressure buildup in the drainage system and allows for proper air circulation. This type of venting is commonly used in multi-story buildings or buildings with complex plumbing systems where individual fixture vents may not be feasible.

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  • 36. 

    The standard size of an outlet for a dry standpipe located at each floor.  

    • 1 1/2"

    • 2"

    • 2 1/2"

    • 1"

    Correct Answer
    A. 2 1/2"
    Explanation
    The standard size of an outlet for a dry standpipe located at each floor is 2 1/2". This size is necessary to provide an adequate flow of water for firefighting purposes. A larger outlet size allows for a greater volume of water to be delivered to the fire, which can help to control and extinguish the flames more effectively. Additionally, a larger outlet size can accommodate larger diameter hoses, which can also increase the flow rate of water. Therefore, a 2 1/2" outlet is the most appropriate choice for a dry standpipe located at each floor.

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  • 37. 

    A vent pipe connected to a stack vent.

    • Circuit vent

    • Loop vent

    • Common vent

    • Relief vent

    Correct Answer
    A. Loop vent
    Explanation
    A loop vent is a type of vent pipe that is connected to a stack vent. It is designed to create a loop in the plumbing system, allowing for proper air circulation and preventing the buildup of pressure. This helps to ensure that waste water flows smoothly and efficiently through the pipes. A loop vent is commonly used in multi-story buildings or complex plumbing systems where multiple fixtures are connected to a single stack vent.

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  • 38. 

    The instrument used for measuring atmospheric pressure.  

    • Hydrometer

    • Water meter

    • Thermometer

    • Barometer

    Correct Answer
    A. Barometer
    Explanation
    A barometer is the instrument used for measuring atmospheric pressure. It consists of a glass tube filled with mercury or a liquid and inverted into a dish of the same liquid. The pressure of the atmosphere pushes the liquid up the tube, and the height of the liquid column is a measure of atmospheric pressure. This allows meteorologists and scientists to monitor changes in air pressure, which can provide valuable information about weather patterns and conditions. A hydrometer measures the density or specific gravity of a liquid, a water meter measures the amount of water consumed, and a thermometer measures temperature.

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  • 39. 

    Bets type of fire detection that can detect fire during the incipient stage.  

    • Pressurization

    • Ionization

    • Liquifaction

    • Nota

    Correct Answer
    A. Ionization
    Explanation
    Ionization is the best type of fire detection that can detect fire during the incipient stage. This method involves using ionization detectors, which contain a small amount of radioactive material. When smoke particles enter the detector, they disrupt the electrical current, causing an alarm to sound. Ionization detectors are highly sensitive and can quickly detect small amounts of smoke or fire, making them effective in detecting fires in their early stages when they are easier to control and extinguish.

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  • 40. 

    The condensing unit is a part of a ___.

    • Escalator

    • Pressurization

    • Refrigeration

    • Freon

    Correct Answer
    A. Refrigeration
    Explanation
    The condensing unit is a part of refrigeration systems. It is responsible for removing heat from the refrigerant and converting it back into a liquid state. This process is essential for the proper functioning of the refrigeration system, as it allows the refrigerant to absorb heat from the surroundings and cool the desired area. Without the condensing unit, the refrigeration system would not be able to effectively cool or freeze items.

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  • 41. 

    A faucet fitted with a nozzle curving downward used as a draw-off tap.  

    • Gate valve

    • Gooseneck

    • Bibbcock

    • S cock

    Correct Answer
    A. Bibbcock
    Explanation
    A bibbcock is the correct answer because it refers to a faucet fitted with a nozzle curving downward that is used as a draw-off tap. The term "bibbcock" is often used interchangeably with "spigot" or "outdoor faucet" and is commonly found in outdoor settings such as gardens or yards. It allows for easy attachment of hoses or other devices for drawing water.

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  • 42. 

    Heat rating for a fixed temperature heat detector.

    • 110-112 deg. F

    • 130-190 deg. F

    • 135-197 deg. F

    • Nota

    Correct Answer
    A. 135-197 deg. F
    Explanation
    This heat detector has a heat rating of 135-197 degrees Fahrenheit. This means that it will activate and trigger an alarm when the temperature in its surroundings reaches this range.

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  • 43. 

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

    • 2"

    • 3"

    • 4"

    • 5"

    Correct Answer
    A. 2"
    Explanation
    The minimum size of trap and waste branch for a shower stall is 2". This means that the trap and waste branch, which are part of the plumbing system, should have a diameter of at least 2 inches to effectively remove waste water from the shower stall. A larger size would allow for better drainage and prevent clogging.

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  • 44. 

    The minimum size of trap and waste branch for a pedestal urinal.

    • 2"

    • 3"

    • 4"

    • 5"

    Correct Answer
    A. 3"
    Explanation
    The minimum size of trap and waste branch for a pedestal urinal is 3". This size is necessary to ensure proper drainage and prevent clogging. A larger size would allow for better flow and reduce the risk of blockages. However, a smaller size would not be sufficient to handle the volume of waste and could lead to frequent backups and maintenance issues. Therefore, 3" is the appropriate size for the trap and waste branch of a pedestal urinal.

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  • 45. 

    Minimum head of water, in meters, required for each section of plumbing for a water test.  

    • 1

    • 2

    • 3

    • 4

    Correct Answer
    A. 3
    Explanation
    The minimum head of water required for each section of plumbing for a water test is 3 meters. This means that there should be a minimum vertical distance of 3 meters between the water source and each section of plumbing being tested. This is necessary to ensure that there is enough pressure to properly test the plumbing system and detect any leaks or issues.

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  • 46. 

    How many days, at least, shall be given before any plumbing work inspection is done after written notice for inspection?

    • 3

    • 4

    • 5

    • 6

    Correct Answer
    A. 3
    Explanation
    After receiving a written notice for inspection, at least 3 days should be given before any plumbing work inspection is done.

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  • 47. 

    Minimum time, in minutes, required for water to stay in the system or pipes for a water test without any leaks to satisfy said testing.

    • Water meter

    • Atmospheric meter

    • Atmospheric vacuum breaker

    • Atmospheric test

    Correct Answer
    A. Atmospheric vacuum breaker
    Explanation
    An atmospheric vacuum breaker is a device used to prevent backflow in a plumbing system. It allows air to enter the system, creating a siphon break and preventing the contaminated water from flowing back into the main water supply. In the context of the question, the atmospheric vacuum breaker ensures that the water remains in the system or pipes for the required minimum time without any leaks, allowing for a successful water test.

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  • 48. 

    Minimum lead content in percent for pipes and fittings safe for humans.

    • 5%

    • 2%

    • 8%

    • 10%

    Correct Answer
    A. 8%
    Explanation
    The minimum lead content in percent for pipes and fittings to be safe for humans is 8%. Lead is a toxic metal that can contaminate drinking water if it leaches from pipes and fittings. The Safe Drinking Water Act in the United States limits the lead content in plumbing materials to protect public health. A lead content of 8% or below ensures that the pipes and fittings do not pose a risk of lead contamination to the water supply.

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  • 49. 

    The minimum vertical distance from the bottom of water pipes to the top of sewer or drain pipe if laid in the same trench on top of the other.

    • 300mm

    • 500mm

    • 200mm

    • 100mm

    Correct Answer
    A. 300mm
    Explanation
    The minimum vertical distance from the bottom of water pipes to the top of sewer or drain pipe, if they are laid in the same trench on top of each other, should be 300mm. This distance is necessary to prevent any contamination or cross-connection between the water supply and the sewer or drain system. By maintaining this minimum distance, the risk of any potential backflow or contamination from the sewer or drain pipe to the water pipes is minimized, ensuring the safety and integrity of the water supply system.

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    ProProfs Editorial Team
  • May 03, 2014
    Quiz Created by
    Jcmakiramdam

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