Building Utilities

curved surface

Creep is a phenomenon whereby sound travels in a

Air-Handling Unit

A packaged assembly of air-conditioning components consisting of coils filters fan humidifier etc. which provides for the treatment of air before it is distributed to an air-conditioned space. Identify item below

Ampacity

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

Luminosity

In lighting it is the ratio of luminous flux to the corresponding radiant flux at a particular wavelength it is expressed in lumens per watt.

Humidistat

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

Increasing the cross sectional area of the conductor increases its resistance

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

Acoustical Analysis

It is defined as the detailed study of all pertinent sound sources sound transmission paths and sound receptors in the context of a particular acoustical problem.

Luminous Efficiency

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

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?

Electromotive Force

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

Piezoelectricity

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

Water Distributing System

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

Branch Interval

A vertical length of soil or waste stack at least eight feet in height (a storey height) within which the horizontal branches from one storey or floor of the building or structure are connected to the stack.

Luminaire

It generally refers to a complete lighting unit consisting of one or more lamps together with components that are used to distribute light; also known as lighting fixtures.

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?

column grids and dimensions shall be indicated

The following are guidelines for preparing an electrical lighting layout EXCEPT

Direct (Pressure) System

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

Freon

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

service drop

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

Varies Inversely with

Inverse Square Law states that sound intensity the square of the distance from the source

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 systely or part of a system under consideration; value is expressed in percentage e.g. 80 percent for residential load.

Angle Valve

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

Electromagnetic Induction

This refers to a process of electromotive force (emf) generation thru the movement of magnetic flux which cuts an electrical conductor

Conduction

Refrigerating cycle involves the following basic operating principles EXCEPT in a closed circuit of tubes and cooling devices.

Rectifier

What device is used to convert alternating current into direct current? An example of the use of this device is that of an elevator where power input is in ac and the required current to run the motor is in dc.

Unitary Room

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

CU

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

compressor condenser expansion valve then evaporator

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

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?

Compressor

Also known as vapor pump it draws refrigerant from the evaporator at low pressure and forces it to the condenser at high pressure before it passes through the expansion valve to reduce pressure and back to the evaporator; cycle is repeated.

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 that the air could contain at the same temperature

Power can be transmitted in longer distances in ac than dc using transformer

Which statement is true regarding alternating current?

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 or finishing it involves the use of drainage water supply and vent pipes and other necessary fittings and pipe supports.

water supply and distribution system

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

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 any contribution from reflections?

ratio of luminous flux to power

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

Water PURIFICATION

A general term which refers to the process of removing contaminants from water. It involves several processes that is intended to render raw water to a potable and safe water for consumption

Conduction

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

Septic Tank

A watertight compartment into which the discharge of sanitary plumbing system or part thereof designed art constructed to retain solids digest organic matter through period of detention and to allow the liquid to discharge into the soil outside of the tank through a system of open-jointed sub-surface piping or seepage.

Sound Absorption

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

Reverberation

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

Building Supply Pipe

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

Trap

The following are examples of plumbing fixtures EXCEPT

Phon

In acoustics what is the unit of loudness level?

siphonage

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

All of these

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

Yoke Vent

Which among the types of ventilation systems is done by installing a fitting/s as an interconnection of a soil/waste stack and a vent stack it is usually connected at the base of a soil/waste stack and at the stack vent? It prevents pressure build-up and the occurrence of siphonage along the soil or waste stack.

A conductor encased in a material that is recognized by the code as electrical insulation

A covered conductor is described as

Ohm's Law

A law stating that relationship between current voltage and resistance it further states that the amount of current passing through a conductor is directly proportional to the voltage across the conductor and inversely proportional to the resistance of the conductor