Building Utilities By Alfred

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Alfred_abadilla
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  • 1/110 Questions

    What does PE pipe stands for?

    • A. Polyethylene
    • B. Plastic Extra Pipe
    • C. Polyvinyl Extra Pipe
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About This Quiz

Buildings are designed in different ways and mostly depend on how it will be used. The quiz below is designed to see how much you understand from the building utilities course on Mep-Mechanical, electrical, plumbing and acoustics. Try it out and see if you need more hours to study. All the best!

Building Utilities By Alfred - Quiz

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  • 2. 

    A device that is basically a double throw switch of generally 3-pole connection that will automatically transfer the power from the standby generator to the building circuitry during the electrical power failure. (C)

    • A. Brown-out Control Switch (BSS)

    • B. Automatic Transfer Switch (ATS)

    • C. Single Throw Switch (STS

    Correct Answer
    A. B. Automatic Transfer Switch (ATS)
  • 3. 

    What is the minimum height above floor level if the window type air conditioners shall be provided with exhaust ducts if the exhaust is discharged into corridors/ hallways/ arcades/ sidewalks, etc…? (NBC 220)

    • A. 2.10 m

    • B. 2.20 m

    • C. 2.30 m

    Correct Answer
    A. A. 2.10 m
    Explanation
    The minimum height above floor level for window type air conditioners with exhaust ducts, if the exhaust is discharged into corridors/hallways/arcades/sidewalks, etc., is 2.10 m.

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  • 4. 

    A cylindrical trap closed on the bottom and having a cover plate for access, usually installed in the drain line from a bath tub.

    • A. air trap

    • B. drum trap

    • C. sewage trap

    Correct Answer
    A. B. drum trap
    Explanation
    A drum trap is a cylindrical trap that is closed on the bottom and has a cover plate for access. It is commonly installed in the drain line from a bath tub. This type of trap is designed to prevent sewer gases from entering the living space while still allowing for easy access for maintenance and cleaning. The term "drum" refers to the cylindrical shape of the trap, which resembles a drum.

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  • 5. 

    What is the standard length of steel conduits? (CDEP IV-23)  

    • A. 5 ft.

    • B. 10ft.

    • C. 15 ft.

    Correct Answer
    A. B. 10ft.
    Explanation
    The standard length of steel conduits is 10ft.

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  • 6. 

    What is the minimum height above floor level if the window type air conditioners shall be provided with exhaust ducts if the exhaust is discharged into corridors/ hallways/ arcades/ sidewalks, etc…? (NBC 220)

    • A. 2.10 m

    • B. 2.20 m

    • C. 2.30 m

    Correct Answer
    A. A. 2.10 m
    Explanation
    The minimum height above floor level for window type air conditioners to be provided with exhaust ducts if the exhaust is discharged into corridors/ hallways/ arcades/ sidewalks, etc is 2.10 m.

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  • 7. 

    The toothed portion of the threshold plate at both ends of an escalator or moving walk, designed to mesh with the groove surface of the moving steps or tradeway. (ME 013)

    • A. combplate

    • B. track

    • C. newel

    Correct Answer
    A. A. combplate
    Explanation
    The toothed portion of the threshold plate at both ends of an escalator or moving walk is called a combplate. It is designed to mesh with the groove surface of the moving steps or tradeway, ensuring a smooth transition for passengers getting on or off the escalator. The combplate helps prevent tripping hazards by preventing gaps between the steps and the floor. It also helps guide passengers in the correct direction and prevents objects from getting caught in the moving parts of the escalator.

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  • 8. 

    An air-conditioning assembly containing the fans, filters, and other components necessary to treat and distribute conditioned air to an entire building or to specific zones within the building. (ME 046)

    • A. damper

    • B. chiller water plant

    • C. air-handling unit

    Correct Answer
    A. C. air-handling unit
    Explanation
    An air-handling unit is a correct answer because it is a system that contains fans, filters, and other components necessary to treat and distribute conditioned air. It is responsible for circulating air throughout a building and maintaining a comfortable indoor environment. A damper is a device used to control airflow, while a chiller water plant is a system that cools water for air conditioning purposes. Therefore, the air-handling unit is the most appropriate choice in this context.

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  • 9. 

    Specification on the electric wire XHHW refers to: (EL 024 / CDEP VI-22)

    • A. Moisture and Heat Resistant Thermoplastic

    • B. Moisture and Heat Resistant Cross Linked Thermosetting Polyethylene

    • C. Moisture and Heat Resistant Rubber

    Correct Answer
    A. B. Moisture and Heat Resistant Cross Linked Thermosetting Polyethylene
    Explanation
    The specification XHHW refers to Moisture and Heat Resistant Cross Linked Thermosetting Polyethylene. This means that the electric wire with this specification is made of a type of polyethylene that has been cross-linked, making it more resistant to moisture and heat. This makes it suitable for use in environments where these factors are a concern, such as outdoor or high-temperature applications.

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  • 10. 

    A measure of the efficiency of a material in absorbing sound at a specified frequency, equal to the fractional part of the incident sound energy at that frequency absorbed by the material. (LA 013)

    • A. Absorption coefficient

    • B. noise criteria curve

    • C. noise reduction coefficient

    Correct Answer
    A. A. Absorption coefficient
    Explanation
    The absorption coefficient is a measure of how well a material can absorb sound at a specific frequency. It represents the fraction of the incident sound energy at that frequency that is absorbed by the material. This coefficient is used to determine the efficiency of a material in reducing noise and is an important factor in designing spaces with good acoustics. The absorption coefficient is different for different materials and frequencies, and it is commonly used in architectural and engineering applications to select appropriate materials for soundproofing or noise control purposes.

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  • 11. 

    A measure of the efficiency of a material in absorbing sound at a specified frequency, equal to the fractional part of the incident sound energy at that frequency absorbed by the material. (LA 013)

    • A. Absorption coefficient

    • B. noise criteria curve

    • C. noise reduction coefficient

    Correct Answer
    A. A. Absorption coefficient
    Explanation
    The given definition describes the absorption coefficient, which is a measure of how efficiently a material absorbs sound at a specific frequency. It quantifies the fraction of incident sound energy at that frequency that is absorbed by the material. This coefficient is used to evaluate the sound absorption properties of materials and is an important factor in designing spaces with good acoustics. Noise criteria curve and noise reduction coefficient are not directly related to the efficiency of sound absorption, so they are not the correct answers.

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  • 12. 

    A pipe or tubing that connects the outlets of a plumbing fixture to the trap.

    • A. trap pipe

    • C. tail piece

    • C. tube

    Correct Answer
    A. C. tail piece
    Explanation
    A tail piece is a pipe or tubing that connects the outlets of a plumbing fixture to the trap. It is commonly used in plumbing systems to create a smooth and efficient flow of wastewater from the fixture to the trap. The tail piece plays a crucial role in maintaining the integrity of the plumbing system and preventing leaks or blockages.

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  • 13. 

    The toothed portion of the threshold plate at both ends of an escalator or moving walk, designed to mesh with the groove surface of the moving steps or tradeway. (ME 013)

    • A. combplate

    • B. track

    • C. newel

    Correct Answer
    A. A. combplate
    Explanation
    The toothed portion of the threshold plate is called a combplate. It is located at both ends of an escalator or moving walk and is designed to mesh with the groove surface of the moving steps or tradeway. The combplate's teeth help to prevent any gaps between the steps or tradeway, ensuring the safe and smooth operation of the escalator or moving walk.

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  • 14. 

    What is the other term for distribution panel? (EL

    • A. None of these

    • B. Electrical Box

    • C. Power Panel

    Correct Answer
    A. C. Power Panel
    Explanation
    The other term for a distribution panel is a power panel. This is a panel that distributes electrical power to various circuits or areas within a building or facility. It is responsible for controlling and protecting the flow of electricity to different areas or devices. The term "power panel" is commonly used in the electrical industry to refer to this type of equipment.

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  • 15. 

    A type of flush action of water closet where flushing action is started by a whirlpool motion followed by a complete flush down.

    • A. Siphon vortex

    • B. direct flush valve

    • C. Siphon jet

    Correct Answer
    A. A. Siphon vortex
    Explanation
    The correct answer is a. Siphon vortex. This type of flush action in a water closet is characterized by a whirlpool motion that initiates the flushing process, followed by a complete flush down. The whirlpool action helps to create a strong siphoning effect, which efficiently removes waste from the toilet bowl. This type of flush is commonly found in modern toilets and is known for its effective and thorough cleaning capabilities.

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  • 16. 

    What is the minimum width between balustrades of an escalator according to the mechanical provision of the National Building Code of the Philippines? (NBC 218)  

    • A. 560mm

    • B. 550mm

    • C. 720mm

    Correct Answer
    A. A. 560mm
    Explanation
    According to the mechanical provision of the National Building Code of the Philippines (NBC 218), the minimum width between balustrades of an escalator is 560mm.

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  • 17. 

    1. An asymmetrical distribution of light and normally allows for adjustments in the lamp position. Used in gallery and other small areas; (graphic standards by ramsey pg.649)

    • A. Accent light with adjustable reflector lamp

    • B. Downlight with reflector lamp

    • C. Downlight with elliptical lamp

    Correct Answer
    A. A. Accent light with adjustable reflector lamp
    Explanation
    The correct answer is a. Accent light with adjustable reflector lamp. This type of lighting fixture allows for adjustments in the lamp position, making it suitable for use in gallery and other small areas. The asymmetrical distribution of light adds to its versatility and effectiveness in highlighting specific objects or areas. This explanation is supported by information from the graphic standards book by Ramsey on page 649.

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  • 18. 

    It is a switch in which a lever or knob, moving through a small arc, causes the contacts to open or close an electric circuit. (EL 005A / CDEP IV-24)  

    • A. float switch

    • B. toggle switch

    • C. knife switch

    Correct Answer
    A. B. toggle switch
    Explanation
    A toggle switch is a type of switch that is activated by moving a lever or knob through a small arc. This movement causes the contacts within the switch to either open or close an electric circuit. Unlike a float switch, which is typically used to detect liquid levels, or a knife switch, which is manually operated by a pivoting metal lever, a toggle switch is specifically designed for small arc movements to control the flow of electricity. Therefore, the correct answer is b. toggle switch.

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  • 19. 

    A type of alternating current where the alternator comprises three armature windings set at 120 degrees to each other, current will be produced in the form of triple wave: (EL 003)

    • A. Three phase

    • B. Two phase

    • D. Single phase

    Correct Answer
    A. A. Three phase
    Explanation
    Three phase alternating current is produced by an alternator with three armature windings set at 120 degrees to each other. This arrangement allows for a more efficient and balanced distribution of electrical power compared to single phase or two phase systems. In a three phase system, the current is produced in the form of a triple wave, with each phase offset by 120 degrees. This type of AC power is commonly used in industrial and commercial applications due to its ability to power large motors and equipment.

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  • 20. 

    An empirically determined index, which combines into a single value the effect of temperature, humidity and air movement on the sensation of warmth or cold felt by the human body. The numerical value is that of the temperature of still saturated air which could induce an identical sensation. (ME 030)

    • A. Design Work Pressure

    • B. Effective Pressure

    • C. Effective Temperature

    Correct Answer
    A. C. Effective Temperature
    Explanation
    The given correct answer is c. Effective Temperature. This is because the explanation provided describes an index that combines temperature, humidity, and air movement to determine the sensation of warmth or cold felt by the human body. The index measures the temperature of still saturated air that would induce the same sensation. Therefore, it can be concluded that the correct term for this index is "Effective Temperature".

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  • 21. 

    The specification on the electric wire THWN refers to: (EL 024 / CDEP VI-22)

    • A. Moisture and Heat Resistant Thermoplastic

    • . Moisture and Heat Resistant Cross Linked Thermosetting Polyethylene

    • C. Moisture and Heat Resistant Rubber

    Correct Answer
    A. A. Moisture and Heat Resistant Thermoplastic
    Explanation
    The correct answer is a. Moisture and Heat Resistant Thermoplastic. This is because the specification THWN refers to a type of electric wire that is designed to be resistant to both moisture and heat. Thermoplastic materials have the ability to soften when heated and harden when cooled, which makes them suitable for this purpose.

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  • 22. 

    A dry-pipe sprinkler system through which after flow is controlled by a valve operated by fire detection devices more sensitive than those in the sprinkler heads. It is used when an accidental discharge would damage valuable materials. (ME 066)  

    • a. preaction system

    • B. dry-pipe system

    • C. deludge system

    Correct Answer
    A. a. preaction system
    Explanation
    A preaction system is a type of sprinkler system that is used when there is a concern about accidental discharge causing damage to valuable materials. It works by having a valve controlled by fire detection devices that are more sensitive than the ones in the sprinkler heads. This means that the system will only activate and release water if both the fire detection devices and the sprinkler heads detect a fire. This added layer of protection helps to prevent any accidental water damage while still providing effective fire suppression when needed.

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  • 23. 

    A pipe connecting upward from a soil or waste stack below the floor and below horizontal connection to an adjacent vent stack at a point above the floor and higher than the highest spill level of fixture for preventing pressure changes in the stack.

    • A. wye

    • B. branch vent

    • C. yoke vent

    Correct Answer
    A. C. yoke vent
    Explanation
    A yoke vent is a pipe that connects upward from a soil or waste stack below the floor and below a horizontal connection to an adjacent vent stack at a point above the floor and higher than the highest spill level of a fixture. This configuration helps to prevent pressure changes in the stack, ensuring proper ventilation and drainage in the plumbing system. A yoke vent is different from a wye or branch vent, which serve different purposes in plumbing systems.

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  • 24. 

    A metallic sleeve caulked or joined to an opening in a pipe into which a plug is screwed that can be removed for cleaning or examining the interior of the pipe.

    • A. spigot

    • B. ferrule

    • C. manhole

    Correct Answer
    A. B. ferrule
    Explanation
    A metallic sleeve caulked or joined to an opening in a pipe into which a plug is screwed that can be removed for cleaning or examining the interior of the pipe is called a ferrule. A ferrule acts as a connector or sealing device between the pipe and the plug, allowing easy access to the interior of the pipe when needed. It is commonly used in plumbing systems to facilitate maintenance and inspection of pipes.

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  • 25. 

    What is the minimum width between balustrades of an escalator according to the mechanical provision of the National Building Code of the Philippines? (NBC 218)  

    • A. 560mm

    • B. 550mm

    • C. 720mm

    Correct Answer
    A. A. 560mm
    Explanation
    According to the mechanical provision of the National Building Code of the Philippines (NBC 218), the minimum width between balustrades of an escalator is 560mm.

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  • 26. 

    A fire involving flammable liquid , as gasoline, oil, and grease, which must be extinguished by excluding air and inhibiting the release of combustible vapors. (ME 066)

    • A. Class A fire

    • B. Class B fire

    • C. Class C fire

    Correct Answer
    A. B. Class B fire
    Explanation
    The given description mentions a fire involving flammable liquids such as gasoline, oil, and grease. These types of fires are classified as Class B fires. Class B fires require a different approach for extinguishing as compared to other classes of fires. They must be extinguished by excluding air and inhibiting the release of combustible vapors. Therefore, the correct answer is Class B fire.

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  • 27. 

    An empirically determined index, which combines into a single value the effect of temperature, humidity and air movement on the sensation of warmth or cold felt by the human body. The numerical value is that of the temperature of still saturated air which could induce an identical sensation. (ME 030)  

    • A. Design Work Pressure

    • B. Effective Pressure

    • C. Effective Temperature

    Correct Answer
    A. C. Effective Temperature
    Explanation
    The correct answer is c. Effective Temperature. The explanation for this is that the given description is talking about an index that combines temperature, humidity, and air movement to determine the sensation of warmth or cold felt by the human body. The index is based on the temperature of still saturated air that would induce the same sensation. Therefore, the term "Effective Temperature" best describes this concept.

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  • 28. 

    A dry-pipe sprinkler system through which after flow is controlled by a valve operated by fire detection devices more sensitive than those in the sprinkler heads. It is used when an accidental discharge would damage valuable materials. (ME 066)

    • A. preaction system

    • B. dry-pipe system

    • C. deludge system

    Correct Answer
    A. A. preaction system
    Explanation
    A preaction system is a type of sprinkler system that uses fire detection devices that are more sensitive than those in the sprinkler heads. This system is used when there is a risk of accidental discharge that could damage valuable materials. Unlike a dry-pipe system, which only releases water when a sprinkler head is activated, a preaction system requires two steps for water to be discharged. First, the fire detection devices must sense a fire, and then a valve is opened to allow water to flow through the sprinkler heads. This extra level of control helps prevent accidental water damage.

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  • 29. 

    A flange that closes the end of a pipe. There is no opening for the passage of liquid gas.

    • A. blank flange

    • B. blow flange

    • C. blind flange

    Correct Answer
    A. C. blind flange
    Explanation
    A blind flange is a type of flange that is used to close the end of a pipe, without any opening for the passage of liquid or gas. It is commonly used when the end of a pipe needs to be sealed off to prevent leakage or to isolate a section of the pipeline. The term "blind" refers to the fact that the flange does not have any openings or holes. Therefore, option c, blind flange, is the correct answer.

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  • 30. 

    A layer of sewage mater that rises to the surface of the sewage in a septic tank

    • A. sludge

    • B. grease

    • C. scum

    Correct Answer
    A. C. scum
    Explanation
    In a septic tank, the layer of sewage matter that rises to the surface is called scum. Scum is typically composed of lighter materials such as oils, fats, and other floating substances. It forms a layer on top of the sewage and is usually skimmed off or removed during the maintenance process. Sludge, on the other hand, refers to the heavier settled solids at the bottom of the tank, while grease refers specifically to fats and oils. Therefore, the correct answer is c. scum.

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  • 31. 

    The liquid and water-borne wastes derived from the ordinary living processes, free from industrial waste and of such character that permit satisfactory disposal with out special treatment.  

    • A. drain waste

    • B. domestic sewage

    • C. waste water

    Correct Answer
    A. B. domestic sewage
    Explanation
    Domestic sewage refers to the liquid and water-borne wastes that come from everyday activities in households, such as bathing, washing dishes, and using the toilet. Unlike industrial waste, domestic sewage does not contain any waste from industrial processes. It is also described as being of a nature that can be disposed of satisfactorily without the need for special treatment. Therefore, domestic sewage is the correct answer in this context.

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  • 32. 

    1. The recessed fluorescent luminaire is usually designed to fit into a standard ceiling grid. A transparent, prismatic lens usually encloses the fixture and directs useful light to the work surfaces; (graphic standards by ramsey pg.649)

    • A. Adjustable washer

    • B. Open reflector downlight

    • C. Narrow reflector unit

    • D. Recessed unit with prismatic lens

    Correct Answer
    A. D. Recessed unit with prismatic lens
    Explanation
    The correct answer is d. Recessed unit with prismatic lens. This is because the given explanation states that the recessed fluorescent luminaire is designed to fit into a standard ceiling grid and is usually enclosed by a transparent, prismatic lens that directs useful light to the work surfaces. This aligns with the description of a recessed unit with a prismatic lens.

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  • 33. 

    What is the minimum branch circuit rating for household ranges and cooking appliances? (CDEP Lectures)  

    • A. 30 amperes

    • B. 40 amperes

    • C. 50 amperes

    Correct Answer
    A. A. 30 amperes
    Explanation
    The minimum branch circuit rating for household ranges and cooking appliances is 30 amperes. This rating ensures that there is enough electrical capacity to power these appliances safely and efficiently. It is important to have the correct circuit rating to prevent overloading and potential hazards.

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  • 34. 

    What is the color coding for piping of Steam division? (CDEP IV-53)

    • A. yellow

    • B. white

    • C. blue

    Correct Answer
    A. B. white
    Explanation
    The correct answer is b. white. In industrial settings, white color coding is commonly used for piping in the steam division. This color coding helps to differentiate steam pipes from other types of pipes and ensures safety by indicating the presence of high-temperature steam.

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  • 35. 

    A safety device of a passenger elevator which reduces the collision shock of a car or counterweight due to over travel beyond the lowest stop. This device stops the car or counterweight safely. (CDEP IV-57)

    • A. fascia plate

    • B. limit switch

    • C. buffer

    Correct Answer
    A. C. buffer
    Explanation
    A buffer is a safety device in a passenger elevator that helps reduce the collision shock when the car or counterweight over travels beyond the lowest stop. It is designed to stop the car or counterweight safely, preventing any damage or injury that could occur from the impact. The buffer absorbs the excess energy and cushions the impact, ensuring a smooth and controlled stop. This safety feature is crucial in preventing accidents and protecting the passengers and the elevator system.

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  • 36. 

    The flow of water or other liquids, mixtures or other substances into the distributing pipes of a potable supply of water from any source other than from its intended source.  

    • A. Back-flow

    • B. Back siphonage

    • C. boiler valve

    Correct Answer
    A. A. Back-flow
    Explanation
    Back-flow refers to the flow of water or other substances into the distributing pipes of a potable water supply from a source other than its intended source. This can occur when there is a reversal of flow due to a drop in pressure or a back-siphonage effect. It is a potential contamination risk that can compromise the safety and quality of the water supply. To prevent back-flow, backflow prevention devices such as check valves or backflow preventer assemblies are installed in the plumbing system.

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  • 37. 

    A condition resulting from bridging any part of a circuit with a conductor of a very low resistance. (CDEP IV-6)

    • A. Branch circuit

    • B. open circuit

    • C. short circuit

    Correct Answer
    A. C. short circuit
    Explanation
    A short circuit occurs when any part of a circuit is bridged with a conductor that has a very low resistance. This causes a sudden increase in current flow, which can lead to overheating and damage to the circuit. A short circuit can result in a circuit breaker tripping or a fuse blowing to protect the circuit from further damage. Therefore, the correct answer is c. short circuit.

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  • 38. 

    It is a switch in which a hinge copper blade is placed between two contact clips. (EL 005)

    • A. float switch

    • B. toggle switch

    • C. knife switch

    Correct Answer
    A. C. knife switch
    Explanation
    A knife switch is a type of switch that consists of a hinge copper blade placed between two contact clips. When the blade is moved into contact with the clips, the circuit is closed, allowing the flow of electricity. This type of switch is commonly used in electrical circuits where a manual on/off control is needed. The hinge design of the copper blade allows for easy and reliable operation of the switch. Therefore, the correct answer is c. knife switch.

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  • 39. 

    In refrigerating systems containing more than _____________, stop valves shall be installed in inlets and outlets of compressors, outlets of liquid receivers, and in liquid and suction branch headers. (NBC 220)

    • A. 7 kilograms

    • B. 8 kilograms

    • D. 9 kilograms

    Correct Answer
    A. D. 9 kilograms
    Explanation
    In refrigerating systems containing more than 9 kilograms, stop valves shall be installed in inlets and outlets of compressors, outlets of liquid receivers, and in liquid and suction branch headers. This is stated in NBC 220.

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  • 40. 

    . It is a joint for soft copper water tubing that shall be made with fittings meeting approved standards.

    • A. burned lead joints

    • B. flared joint

    • C. asbestos cement sewer pipe joint

    Correct Answer
    A. B. flared joint
    Explanation
    A flared joint is the correct answer because it is a commonly used joint for soft copper water tubing. This type of joint involves flaring the end of the tubing and using a fitting with a corresponding flare to connect the pieces together. Flared joints provide a secure and leak-free connection, making them suitable for water applications. Burned lead joints and asbestos cement sewer pipe joints are not appropriate for soft copper water tubing.

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  • 41. 

    . An apparent shift in the frequency occurring when an acoustic source and listener are in motion relative to each other, the frequency increasing when the source and the listener approach each other and decreasing when they move apart. (LA 010)

    • A. wave front

    • b.droppler effect

    • C. logarithm effect

    Correct Answer
    A. b.droppler effect
    Explanation
    The phenomenon described in the question is known as the Doppler effect. It refers to the change in frequency of a wave when the source of the wave and the observer are in relative motion. When the source and the listener approach each other, the frequency appears to increase, resulting in a higher pitch. Conversely, when they move apart, the frequency appears to decrease, resulting in a lower pitch. This effect is commonly observed in everyday situations, such as the change in pitch of a siren as a vehicle passes by.

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  • 42. 

    A unit of heat equal to the quantity of heat required to raise the temperature of one kilogram of water 1 degree Celsius at a pressure to one atmosphere, equivalent to 1000 small calories. (ME 038)

    • A. calorie

    • B. large calorie

    • C. therm

    Correct Answer
    A. A. calorie
    Explanation
    The given definition describes a unit of heat that is required to raise the temperature of one kilogram of water by one degree Celsius. This unit is equivalent to 1000 small calories. Therefore, the correct answer is a. calorie.

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  • 43. 

    In refrigerating systems containing more than _____________, stop valves shall be installed in inlets and outlets of compressors, outlets of liquid receivers, and in liquid and suction branch headers. (NBC 220)

    • A. 7 kilograms

    • B. 8 kilograms

    • C. 9 kilograms

    Correct Answer
    A. C. 9 kilograms
    Explanation
    In refrigerating systems containing more than 9 kilograms, stop valves shall be installed in inlets and outlets of compressors, outlets of liquid receivers, and in liquid and suction branch headers. This is according to NBC 220.

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  • 44. 

    A system of mechanical ventilation in which fresh air is forced into the space to be ventilated from a chamber at a pressure slightly higher than atmospheric pressure, so as to expel stale air. (ME 048)

    • A. plenum ventilation

    • B. chamber ventilation

    • . mechanical ventilation

    Correct Answer
    A. A. plenum ventilation
    Explanation
    Plenum ventilation is a system of mechanical ventilation where fresh air is pushed into a space at a slightly higher pressure than the surrounding atmosphere. This higher pressure helps to expel stale air from the space. The term "plenum" refers to a chamber or space that is used for air distribution. Therefore, plenum ventilation accurately describes the process of using a chamber to force fresh air into a space and expel stale air.

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  • 45. 

    A system of mechanical ventilation in which fresh air is forced into the space to be ventilated from a chamber at a pressure slightly higher than atmospheric pressure, so as to expel stale air. (ME 048)

    • A. cross-ventilation

    • B. centrifugal ventilation

    • D. plenum ventilation

    Correct Answer
    A. D. plenum ventilation
    Explanation
    Plenum ventilation is a system of mechanical ventilation that works by forcing fresh air into a space at a slightly higher pressure than the surrounding atmosphere. This higher pressure helps to expel stale air from the space, effectively ventilating it. Cross-ventilation refers to the natural flow of air through a space due to openings on opposite sides, while centrifugal ventilation involves the use of a fan or blower to create airflow. Therefore, plenum ventilation is the correct answer based on the given explanation.

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  • 46. 

    The minimum inside diameter for electrical wire conduits as per Philippine Electrical Code:           

    • A. 3/8” dia.

    • B. ½” dia.

    • C. 1-1/4” dia

    Correct Answer
    A. B. ½” dia.
    Explanation
    The minimum inside diameter for electrical wire conduits as per the Philippine Electrical Code is ½" dia. This means that the conduit must have a minimum diameter of half an inch to accommodate the electrical wires. This ensures that there is enough space for the wires to pass through the conduit without causing any damage or obstruction. A smaller diameter conduit may not be able to accommodate the wires properly, leading to potential safety hazards.

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  • 47. 

    What type of building wire has a trade name as Moisture and Heat Resistant Thermoplastic used for dry and wet locations. (EL 024 / CDEP VI-22)

    • A. TW

    • B. THHN

    • C . THW

    Correct Answer
    A. C . THW
    Explanation
    THW is the correct answer because it is a type of building wire that has a trade name as Moisture and Heat Resistant Thermoplastic. It is specifically designed for use in both dry and wet locations, making it suitable for a variety of applications.

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  • 48. 

    A flexible, non metallic, fire-resistant tubing for conductors in knob-and-tube wiring. (EL 005)

    • A. cord

    • B. loom

    • C. connector

    Correct Answer
    A. B. loom
    Explanation
    The correct answer is b. loom. A loom is a device used in weaving to hold the warp threads in place while the weft threads are woven through them. In the context of the given question, a loom refers to a flexible, non-metallic, fire-resistant tubing that is used to protect and insulate conductors in knob-and-tube wiring. This tubing acts as a protective covering for the wiring, ensuring safety and preventing potential fire hazards.

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  • 49. 

    No parts of the swimming and wading pools shall be placed under existing service drop conductors or any other overhead wiring; nor shall such wiring be installed above the following except: (NBC p.212)

    • A. none of the above

    • B. diving structures

    • C. balconies and area readily accessible

    Correct Answer
    A. C. balconies and area readily accessible
    Explanation
    The correct answer is c. balconies and area readily accessible. This means that the swimming and wading pools can have overhead wiring installed above balconies and areas that are easily accessible. However, the wiring cannot be placed under existing service drop conductors or any other overhead wiring, and it cannot be installed above diving structures.

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Quiz Review Timeline (Updated): Feb 13, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Feb 13, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • May 25, 2011
    Quiz Created by
    Alfred_abadilla
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