Utilities 2 Flashcards
Mho as used in electrical systems calculation is defined as
The reciprocal of ohm
A unit of mechanical power
Horsepower
Electrical power
Watt
Volt-electrical potential
Volt-ampere
Electrical current
Ampere
Not a basic component part of an escalator
Governor
Unit for lux in lighting and illumination calculation
1 lumen per sqm
SI unit of light intensity
Candela
1 lumen per square foot
Foot candle
The first section of water supply piping in a building after the water meter
Water distributing pipe
Comes before the service meter
Water service pipe
Tesla is the unit of
Magnetic flux
In Inverse Square Law, it states that: “Sound intensity _____ the square of the distance from the source.”
Varies inversely with
Not a component of a hydraulic elevator
Counterweight
A bathroom containing a water closet, a lavatory, and a bathtub
Full bath
The following are elements of a centralized airconditioning system
- Air handling unit
- Control equipment
The following are elements of a centralized airconditioning system except
Method of cooling
Acoustics is a science that concerns with
- Transmission of sound
- Generation of sound
- Effect of sound waves
A valve in which the flow of water is cut off by means of a circular disk that fits against the valve seat. The pane of movement of the disk is parallel to the normal direction of the flow of water, which is turned through a tortuous passage to direct the flow normal to the face of the disk.
Globe valve
Transformer
A mechanical device used to step up or step down voltage in AC
A factor used in calculating cooling load that includes heat transferred from walls, doors, ceiling, etc.
Thermal load
A receptacle attached to a plumbing system other than a trap in which water or wastes may be collected or obtained for ultimate into the plumbing system
Fixture
The following are examples of pre-fabricated acoustical units
- Slotted tile or panel
- Shredded wood foam board
- Fissured tile panel
Not an example of pre-fabricated acoustical units except
Hardwood panel
Not a way to transfer heat
Polarization
Ways to transfer heat
- Conduction
- Convection
- Radiation
“Let the future tell the truth and evaluate each one according to his work and accomplishment. The present is theirs, the future for which I really work for is mine.”
Nikola Tesla
Material that would effectively reduce reflected noise and reverberation time to produce safe and enjoyable surrounding
Melamine foam linear wedges
The art and science of installing in buildings the pipes, fixtures, and other apparatus for bringing in water supply and removing water and waterborne waste
Plumbing
Any of a variety of soft floor finishes made of synthetic materials such as nylon or natural material such as wool. It is either glued directly to the floor or installed over an underlayment of hair felt or foam rubber.
Carpet
A violation of all the provisions in the mechanical code on elevator design and installation
3 ropes are required for the traction-type elevator.
Part of the drainage system that extends from the end of the building drain and conveys its discharge to the public sewer, private sewer, individual sewage disposal system, or other appropriate points of disposal
Building sewer
A branch of acoustics that involves the control of noise pollution, environmental noise, which include motor vehicles, aircraft noise, etc.
Environmental acoustics
Alternating current character/s
- Positive and negative polarity
- Frequency
- Average value is zero
A valve in which the flow of liquid is controlled by a rotating drilled ball that fits tightly against a resilient (flexible) seat in the valve body
Ball valve
The Pyramid is a type of commercially produced acoustical tile. Which of the following is not a characteristic of this material?
Tetrahedral in shape
The Pyramid is a type of commercially produced acoustical tile. Which of the following is a characteristic of this material?
- Made of open celled polyurethane acoustical foam
- Available in 2, 3, & 4 inch thickness
- Ideal for audio room application
A vertical length of soil or waste stack at least 8 feet in height (a storey high), within which the horizontal branches from one storey or floor of the building or structure are connected to the stack
Branch interval
A pipe connecting upward from a soil or waste stack below the floor and below the horizontal connection to an adjacent vent stack at a point above the floor and higher than the highest spill level of fixtures for preventing pressure changes in the stack
Yoke stack
Material that is named in honor of a German physicist consists of a hollow material with a small hole on one side. Used to detect individual frequency of complex acoustic wave configuration
Helmholtz resonator
A kind of return bend of the small-sized faucet, one end of which is about one foot long and the other end is about three inches. Commonly used as a faucet for pantry and drinking fountain. Also the lead connection between the service pipe and the water main. Also a P-trap.
Gooseneck
A continuous belt or chain attached to the handrail and directly connected to the steps
Endless belt
The minimum distance between the handrails of escalators
558 mm
A watertight receptacle which the discharge of sanitary plumbing system or part thereof, designed and constructed to retain solids, digest organic matter through a period of detention and to allow the liquids to discharge into the soil outside of the tank through a system of open jointed subsurface piping or seepage pit
Septic tank
A common measure of the probable discharge into the drainage system by various types of plumbing fixtures on the basis of one unit of this being equal to a discharge rate of 7.5 gallons per minute or one cubic foot of water per minute
Drainage fixture unit
A type of resonator made from empty clay vessels of different sizes. Their absorption ranges from 100-400 hertz.
Individual resonator
A circuit type where components are electrically connected end to end
Series circuit
The installation of parts of the plumbing system can be completed prior to the installation of fixtures or finishing. This includes drainage, water supply, and vent piping, and necessary fixture supports
Roughing-in
Consists of loose fibers or granules and is made from cellulose, fiberglass, rock wool, cotton, or other materials; come in bags and are usually blown into cavities using special equipment
Loose-fill insulation
The overall covering of underground feeder and branch circuit cables shall be
Fungus and corrosion resistant
A fitting or device designed and constructed to provide, when properly vented, a liquid seal that prevents backflow and passage of foul air and gases without materially affecting the flow of sewage or wastewater through it
Trap
R-12 refrigerant name
Dichlorodifluormethane
Escalator recommended speed
90-120 fpm
A type of surface flush raceway designed to receive conductors and receptacles assembled in the field or in the factory
Multi-outlet assembly
Transondent facings are those transparent facings with holes. Which facing will reflect more sound?
10% opening
A type of switch used for transferring one or more load conductor connections from one power source to another
Transfer switch
Which of the following sources of sound produces the highest sound pressure level (SPL)?
Cafeteria with people in it
