Building Utilities

Voltage of A-C Current can be stepped up or down

Which of the following statements/phrases best explains why a-c current is extensively used in residential commercial and industrial applications?

Air-Handling Unit

A packaged assembly of air-conditioning components consisting of coils filters fan humidifier etc. which provides for the treatment of air

Water Supply and Distribution System

In a building it consists of water service pipe building supply pipes and the essential branch pipes valves and appurtenances

Roughing-In

In plumbing it is defined as the installation of parts of the plumbing system which can be completed prior to installation of fixtures

compressor condenser expansion valve then evaporator

Which of the following arrangement of components will produce cooling effect in a refrigerating cycle?

Demand Factor

It is the ratio of the maximum demand of a system or part of a system to the total connected load of a system

Siphonage

A suction created by the flow of liquid in pipes a pressure less than the atmospheric pressure

Acoustical Analysis

It is defined as the detailed study of all pertinent sound sources sound transmission paths and sound receptors

Conduction

It is the transfer of heat from a point of higher temperature to a point of lower temperature

Piezoelectricity

Electricity produced by certain crystals such as quartz and Rochelle salts resulting from the application of mechanical stress

Angle Valve

This valve is commonly installed on lavatories to control water supply where inlets and outlet openings are perpendicular to each other

Rectifier

What device is used to convert alternating current into direct current?

Ampacity

It is the ability of wire or cable to carry current without overheating; it is rated in amperes

Septic Tank

A watertight compartment into which the discharge of sanitary plumbing system or part thereof is designed and constructed to retain solids

Direct Sound Field

What is the term used for a sound field in which the energy arrives at the receiver in a direct path from the source without reflections?

Upfeed and Gravity Distribution System

What is the most common type of water distribution system which depends on the pressure from the water main

Branch Interval

A vertical length of soil or waste stack at least eight feet in height within which horizontal branches are connected to the stack

Relative Humidity

It is the ratio of the weight of water vapor actually contained in humid air to the maximum possible weight of water vapor at the same temperature

Electromotive Force

Electrical pressure that causes the electrons to move through a conductor it is analogous to pressure in water

Reverberation

It is the persistence of sound in an enclosed space resulting from repeated reflection or scattering of sound

column grids and dimensions shall be indicated

The following are guidelines for preparing an electrical lighting layout EXCEPT

Freon

What is the most common term used to refer to the liquid refrigerant used in air-conditioning systems?

Purification

A general term which refers to the process of removing contaminants from water to render raw water potable and safe

Service Drop

In power supply system this refers to the overhead service conductors running from utility poles to the point of connection

Common Vent

Which type of venting system is used to provide ventilation to two (2) fixture traps usually placed side-by-side or back-to-back?

Water Distributing System

A pipe which conveys potable water from the building supply pipe to the plumbing fixtures and other outlets

Water closet may be located in an unlit or unventilated room

Which of the following statements is a violation or contradictory to the basic plumbing principles?

Ohm's Law

A law stating the relationship between current voltage and resistance

Luminous Efficiency

The ratio of luminous flux (lumen) emitted by a luminaire to the total flux emitted by the lamp

Decibel

In acoustics what is the unit of loudness level?

Trap

The following are examples of plumbing fixtures EXCEPT

Compressor

Also known as vapor pump it draws refrigerant from the evaporator at low pressure and forces it to the condenser at high pressure

Conduction

Refrigerating cycle involves the following basic operating principles EXCEPT

Electromagnetic Induction

This refers to a process of electromotive force (emf) generation through the movement of magnetic flux

A conductor encased in a material that is not recognized by the code as electrical insulation

A covered conductor is described as

Unitary Room (AC Type)

A type of air-conditioning system where a self-contained unit houses all the necessary air-conditioning components

Building Supply Pipe

In water supply system it is the first section of water supply piping in a building after the water meter

Power can be transmitted in longer distances in AC than DC using transformer

Which statement is true regarding alternating current?

Humidistat

What regulating device in an air conditioning unit is actuated by changes in humidity?

Varies Inversely with the square of the distance from the source

Inverse Square Law states that sound intensity

Vent Stack

Which among the types of ventilation systems is done by installing a fitting as an interconnection of a soil/waste stack and a vent stack?

Sound Attenuation

It is the product of surface area (sq. ft.) and sound absorption coefficient (SAC) with the unit sabin

Curved Surface

Creep is a phenomenon whereby sound travels in a

Luminaire

It generally refers to a complete lighting unit consisting of one or more lamps together with components used to distribute light

CU

Which of the following is a factor or variable used in the Zonal Cavity Method of illumination calculation?

Ratio of luminous flux to power

The ratio of lumens produced by a lamp and the amount of power used to generate lumens

Luminosity

In lighting it is the ratio of luminous flux to the corresponding radiant flux at a particular wavelength

All of these

Which of the following is an example of an electronic amplification system?

Increasing the cross sectional area of the conductor increases its resistance

Which of the following statements describing electrical resistance in a conductor is FALSE?

Plumbing

The art and science of creating and maintaining sanitary conditions in buildings used by humans

Plumbing System

Includes the water supply distributing pipes fixtures fixture traps soil waste and vent pipes building drain and sewer

Water Supply System

A system in plumbing which provides and distributes water to different parts of the building for domestic purposes

Drainage System

All the piping within a public or private premises which conveys sewage rainwater or other liquid wastes to a point of disposal

Sanitary Drainage and Vent piping System

Installed to remove wastewater and water-borne wastes and to provide circulation of air within drainage piping

Sanitary Drainage pipes

Pipes installed to remove wastewater and water-borne wastes from plumbing fixtures and convey these to the sewer

Ventilation System

A system of pipes installed for providing circulation of air and creating balanced atmospheric condition within the system

Soil Pipe

A pipe that conveys the discharge of water closets or similar fixtures containing fecal matter with or without other discharges

Waste Pipe

A pipe that conveys only liquid waste free of fecal matter

Indirect Waste

A waste pipe that does not connect directly with the drainage system but discharges into it through an air break or gap

Sewage

Any liquid waste containing animal or vegetable matter in suspension or solution

Drain

A pipe which carries ground and surface water storm water or waste water into the building drainage system

Storm Drainage System

A system of pipes and fittings for removing storm water rainwater surface run-off and underground seepage

Air break

The physical separation between a waste pipe and an indirect waste receptor or device indirectly connected

Air gap

The unobstructed vertical distance through the free atmosphere between the outlet of a faucet and the flood level rim

Angle valve

A valve in which the inlet and outlet openings are at 90 degree angle to one another

Backflow

The flow of water or wastewater in pipes in a reverse direction from that normally intended

Back pressure

A pressure within the sanitary drainage system or vent piping system that is greater than atmospheric pressure

Back Siphonage

The flowing by negative pressure of contaminated or polluted water from a plumbing fixture into a potable water system

Backwater valve

A device installed in piping to prevent the reverse flow of storm or sewage into the drainage system

Ball valve

A valve in which the flow of liquid is controlled by a rotating drilled ball that fits tightly against a resilient seat

Battery of fixtures

Any group of two or more similar adjacent fixtures which discharge into a common horizontal waste or soil branch

Bell or hub

The end portion of a pipe which for a short distance is enlarged to receive the end of another pipe

Bibb

A term that is synonymous with faucet cock plug tap or spigot

Bidet

A kind of fixture which is used for bathing the external genitals and posterior parts of the body

Building drain / House drain

That part of the lowest horizontal piping of a plumbing system which receives discharge from soil waste and drainage pipes

Building / House sewer

That part of the drainage system that extends from the end of the building drain to the public or private sewer

Caulking / Calking

Plugging an opening with oakum lead or other material pounded into the annular space

Cleanout

A fitting with a removable plate or plug that is placed in plumbing drainage pipelines to allow access for cleaning

Conductor or Leader

Part of the roofing and/or area gutter system that takes water from a roof area to a storm drain

Deadend

The extended portion of a pipe that is closed at one end permitting stagnation of wastewater or air

Developed length

The length along the center line of pipes and fittings

Drainage fixture unit (dfu)

A common measure of the probable discharge into the drainage system by various types of plumbing fixtures

Flushometer valve

A device which discharges a predetermined quantity of water to fixtures for flushing purposes actuated by direct water pressure

Gate Valve

A valve in which the flow of water is cut-off by means of a circular disk fitting against machine-smoothed surfaces at right angles

Globe Valve

A valve in which the flow of water is cut off by means of a circular disk that fits against the valve seat

Gooseneck

A return bend faucet with one end about one foot long and the other end about three inches commonly used in pantry sinks

Main vent / Vent stack

A vertical vent pipe installed primarily for the purpose of providing circulation of air to or from any part of the drainage system

Manhole

An opening constructed in any part of plumbing system of sufficient size for a person to gain access thereto

Potable water

Water that meets government agency standards used for culinary domestic and drinking purposes

P trap / 1/2 S trap

A P-shaped trap commonly used on most plumbing fixtures except for fixtures having an integral trap

Riser

A water supply pipe that extends vertically one full storey or more to convey water to fixture branches

Septic tank

A watertight receptacle which receives sanitary discharge designed to retain solids digest organic matter and allow liquid discharge

Sump

A tank or pit below the normal grade of gravity receiving liquid wastes or sewage which must be mechanically pumped

Yoke vent

A pipe connecting upward from a soil or waste stack below the floor to an adjacent vent stack above the floor

Capillarity

The ability of water to climb up a surface against the pull of gravity

Hard Water

Water containing elements such as calcium magnesium iron and aluminum which cause hardness

Soft Water

Water without the presence of calcium and magnesium characterized by easiness of producing lather from soap

Grey Water

Water from laundries wash basins sinks showers and bathtubs

Black Water

Water plus human waste flushed out of toilets and urinals

Coagulation (Flocculation)

Process removing suspended matter along with coloration by adding a chemical such as alum to turbulent water