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BOMI Design Oper & Maint Part I > Vocabulary Words > Flashcards

Vocabulary Words Flashcards

1
Q

Adhesive failure

A

Failure of the sealant to bond to the substrate

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2
Q

Aerobic

A

Living, active, or occurring only in the presence of oxygen

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3
Q

Amine

A

Any of a class of basic organic compounds derived from ammonia by replacement of hydrogen with one or more monovalent hydrocarbon radicals

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4
Q

Ammonia

A

Pungent colorless gaseous alkaline compound of nitrogen and hydrogen. Is very soluble in water and easily condensed to a liquid by cold and pressure

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5
Q

Anaerobic

A

Living, active, occurring, or existing in the absence of free oxygen

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6
Q

Ancillary bond

A

Form of security that is a type of surety bond where the surety co. Guarantees other factors which are incidental and essential to the performance of a contract

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7
Q

Anode

A

Metal surface that emits positively charged ions transferred to a cathode through an electrolyte

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8
Q

Asbestos

A

Generic name for a number of naturally occurring, hydrated mineral silicates with a unique fibrous structure known for fire resistant qualities

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9
Q

As-built drawings

A

Accurate record of the placement of construction components and the routing of other components that indicate how a building was built, rather than how it was designed to be built.

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10
Q

Autoignition

A

Bursting into flame of a material without a source of ignition

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11
Q

Baffle

A

Device (plate, wall or screen) to deflect, check or regulate flow or passage (as fluid, light or sound)

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12
Q

Batt

A

Blanket of thermal insulation (as fiberglass)

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13
Q

Bedding

A

Layer of mortar on which masonry unit is set

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14
Q

Bid bond

A

Written form of security executed by the bidder as principal and a surety

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15
Q

Binder

A

Element of paint that is the glue that combines the pigment and solvents and allows for surface adhesion

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16
Q

Bitumen

A

Semisolid mixture of complex hydrocarbons derived from petroleum or coal after distillation. In roofing there are 2 basic bitumens: asphalt and coal-tar pitch.

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17
Q

Bleedoff

A

Removal of water from a cooling tower to reduce the concentrated solids in an air-conditioning cooling tower

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18
Q

Blowdown

A

Discharge of water from a boiler that contains a high proportion of dissolved solids. Two types are surface skimming and bottom blowdown

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19
Q

Breakdown maintenance

A

Essentially no maintenance

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20
Q

Cohesive failure

A

Failure of the sealant to bond to itself

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21
Q

Cold joint

A

Defined interface between concrete poured at two different times

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22
Q

Centrifugal

A

Acting or proceeding in a direction away from a center or axis

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23
Q

Conductance

A

Measurement of how well or easily material transmits heat

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24
Q

British thermal unit BTU

A

Measurement expressing the quantity of heat possessed by an object. 1 BTU is equal to the amount of heat required to raise the temperature of 1 pound of water 1 degree Fahrenheit

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25
Q

Comfort zone

A

Temperature, humidity and air cleanliness range within which one is comfortable

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26
Q

Concrete

A

Artificial stone made by binding together particles of aggregate with a paste made of cement and water

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27
Q

Condensate

A

Product of condensation, especially a liquid obtained by condensation of a gas or vapor

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28
Q

Commissioning

A

Initial start up and verification of proper operation of the original design specification

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29
Q

Clay

A

Soil composed of microscopically small mineral particles, flattened and fitting closely together

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30
Q

Check valve

A

Valve designed to allow liquid or gas to flow in one direction only

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31
Q

Combustion

A

Chemical process (burning) that requires fuel, oxygen and heat to be present

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32
Q

Building codes

A

Regulations that promote general safety by regulating the design and construction of the building’s components

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33
Q

Building related illness (BRI)

A

Specific, diagnosable illness whose symptoms can be identified and whose cause is directly attributed to airborne building pollutants (Legionnaires disease)

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34
Q

Building stone

A

Natural rock of adequate quality to be quarried and cut as dimension stone as it exists in nature and used in the construction industry

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35
Q

Compressor

A

Primary refrigeration system component that circulates refrigerant through the system and increases the refrigerant’s temperature and pressure (heart of HVAC system)

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36
Q

Conductivity

A

Ability of a fluid (water) to conduct electricity

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37
Q

Delamination

A

Separation into constituent layers

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38
Q

Demising walls

A

Slab to slab partitions, generally fire rated, that separate a tenant’s space from a neighboring tenants. Also called demising partitions

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39
Q

Dry-bulb temperature (DB)

A

Temperature of air as measured by an ordinary thermometer

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40
Q

Dew point

A

Temperature at which air is fully saturated with moisture and condensation can occur

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41
Q

Conduction

A

Direct flow of heat through a material resulting from physical contact

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42
Q

Convection

A

Transfer of heat in a fluid, such as air, caused by the movement of the heated fluid

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43
Q

Curtain wall

A

External nonloadbearing wall which is intended to separate the exterior and interior environments and which is fixed to the external building frame

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44
Q

Easement

A

Right of one party to lawfully use the land of another for a beneficial purpose

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45
Q

Jamb

A

Upright piece or surface forming the side of an opening, as for a window or door

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46
Q

Joists

A

Beams ranged parallel from wall to wall in a structure to support or floor or ceiling

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47
Q

Leeward

A

Being in or facing the direction toward which the wind is blowing

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48
Q

Insulating glass

A

Two glass lights with 1/4 inch to 1/2 inch between them; the most energy efficient of the three glass applications

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49
Q

Ion exchange

A

Process whereby ions in solution are interchanged by a reactive material

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50
Q

Jute

A

Glossy fiber of either of two Asian plants used chiefly for sacking, burlap, and twine, but also as carpet backing

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51
Q

Monolithic glass

A

Single, flat piece of glass of constant thickness

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52
Q

Manometer

A

Instrument for measuring the pressure of gases and vapors

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53
Q

Louver

A

Finned or vaned device for controlling the flow of air

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54
Q

Mean radiant temperature MRT

A

Average temperature of all the surfaces to which a person is exposed, exchanging infrared radiation

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55
Q

Mercaptan

A

Harmless but flammable and colorless gas added to natural gas to assist in detecting gas leaks

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56
Q

Load

A

A force, such as weight, measured in pounds, that a building must sustain

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57
Q

Latent heat

A

Heat that when added to or removed from a particular substance changes the state of the substance (eg solid to liquid, liquids to gas) without changing its temperature

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58
Q

Infrared

A

Situated outside the visible spectrum at its red end (having a wavelength between 700 nanometers and 1 millimeter)

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59
Q

Indoor air quality IAQ

A

Overall quality of air in an enclosed space, accounting for factors such as temperature, humidity, odor, clarity and absence of toxins or other agents that impair human health

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60
Q

Infiltration

A

Uncontrolled leakage of unconditioned air into a building generally caused by wind loads or by a negatively pressured building

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61
Q

Inlet guide vanes

A

Device used for capacity control on centrifugal compressors. Vanes are located in front of the impeller and regulate the flow of the refrigerant into it

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62
Q

Limestone

A

Rock that is formed chiefly by accumulation of organic remains (shells or coral), consists mainly of calcium carbonate, is used in building and yields lime when burned

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63
Q

Lithium bromide

A

Absorbent used in absorption refrigeration systems. Nontoxic salt solution with water

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64
Q

Butterfly valve

A

Valve consisting of two semicircle clappers hinged to a cross rib that permits fluid flow in only one direction, or a valve in a pipe consisting of a disk turning on a bisecting axis

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65
Q

Cast-iron sectional boiler

A

Boiler in which water passes through identical sections made of cast iron and placed side by side

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66
Q

Cathode

A

Area along a metal surface that attracts electrons from an anode. Cathode area controls how fast the metal loss occurs at the anode

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67
Q

Condenser

A

Heat exchanger in which hot, pressurized refrigerant is condensed through the transfer of heat to cooler surrounding air, water, or earth; heat rejection component of an air-conditioning system

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68
Q

Cogeneration

A

Sequential production of electrical or mechanical energy and thermal energy

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69
Q

Coaxial cable

A

Combination of single wire surrounded by insulation and a woven metal braid that shields against electromagnetic noise

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70
Q

Caustic embrittlement

A

Hardening of metal that takes away some of its tensile strength. Often caused by high pH

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71
Q

COP coefficient of performance

A

Ratio of useful heating or cooling provided by a system to the energy consumed by the system in delivering the heating or cooling; in consistent units for a specific temperature. Higher COPs indicate higher system efficiencies

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72
Q

Counterflow

A

Air moving against water. In some cooling towers, the water falls down vertically while the air moves up vertically against the water

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73
Q

Crossflow

A

Air moving across water. In some cooling towers, the water falls down vertically while the air moves horizontally across the water

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74
Q

Cycles of concentration

A

Ratio of the concentration of a chemical or mineral in the recirculating water to its concentration in the makeup water

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75
Q

Dead band

A

Preset temperature range for which neither heating nor cooling is supplied. In this temperature range, the HVAC system provides ventilation only

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76
Q

Deaeration

A

Process of removing oxygen and carbon dioxide gases before they enter a system

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77
Q

Deferred maintenance

A

Deterioration requiring increased levels of maintenance and repairs, brought about postponing routine maintenance and repairs, often for several years

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78
Q

Continuous commissioning

A

Hybrid of retro-commissioning and recommissioning that requires a “baseline” performance measurement, and also involves continuously monitoring performance after modifications are made

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79
Q

Diffuser

A

Outlet that spreads and circulates the flow of air from an HVAC system over a large area of a room

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80
Q

Double glazing

A

2 layers of glass; similar to insulating glass but with a wider space to 1 in to 4 in between the glass lights

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81
Q

Ductility

A

Material’s ability to withstand extensive deformation without failure under high stress

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82
Q

Emittance emissivity

A

Ability of a material’s surface to give off radiant energy

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83
Q

Electric boiler

A

Unit that uses electric resistance heating coils to create hot water or steam used in air handling units or radiators

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84
Q

Electrolyte

A

Substance that dissolves in water to form particles with positive and negative electric charges (ions) making the water a conductor of electric current

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85
Q

Elastomeric

A

Having elastic properties; capable of expanding or contracting with the surfaces to which the subject material is applied without rupturing

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86
Q

Dimension stone

A

Natural stone that has been selected, trimmed or cut to specified shapes or sizes with or without one or more mechanically dressed surfaces

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87
Q

Economizer cycle

A

Energy saving process that discontinues the operation of the mechanical cooling system when the outdoor temperature falls below a predetermined temperature setting normally between 50 degrees and 60 degrees

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88
Q

Economizer mode

A

Setting within an air handling system that allows the use of cool outside air or water and less mechanical cooling

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89
Q

Enthalpy

A

Total heat content of a substance, such as air, measuring its sum total energy and consisting of dry bulb temperature plus wet bulb temperature (temperature and humidity)

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90
Q

Epoxies

A

Thermosetting resin that cures by adding a hardener or catalyst

91
Q

Fieldstone

A

Natural building stone as found in the field

92
Q

Evaporator

A

Heat exchanger that absorbs the heat surrounding it to cause the liquid refrigerant inside it to boil until the refrigerant leaves as a superheated vapor

93
Q

Expression of interest EOI

A

Issued to determine if there are contractors that are interested in working on a project (Canadian version of RFI)

94
Q

Extrusion

A

Process of making a shaped object, such as a rod or tube, by forcing a material into a mold

95
Q

Fill

A

Part of a cooling tower over which water is distributed and exposed to outside air to cool through evaporation. Most fill is composed of FRP, PVC and wood

96
Q

Finish coat

A

Final layer of paint that usually determines the final appearance in terms of color and glossiness

97
Q

Firetube boiler

A

Boiler in which the hot gases from combustion pass through tubes surrounded by water or steam

98
Q

Fixture

A

Device used to control the flow and use of water (faucets, toilets, and hose connections)

99
Q

Flashing

A

Various connecting devices that seal roofing membrane joints at expansion joints, drains, gravel-stops, and other places where the membrane ends

100
Q

Flash

A

To form vapor from condensate suddenly as a result of reduced blowdown

101
Q

FAR floor area ratio

A

Ratio of the total floor area of all buildings on a lot to the area of the lot

102
Q

Fly ash

A

Ash recovered from waste gases, used chiefly as a reinforcing agent in the manufacture of bricks, concrete, etc

103
Q

Formwork

A

A structure of wood or metal that temporarily provides shape and support to a concrete or masonry building element that is not yet self supporting

104
Q

Head pressure

A

Higher pressure point in a body of fluids

105
Q

Hermetic

A

Sealed

106
Q

Hydronics

A

Transfer of heat using a circulating fluid such as water

107
Q

Glazing

A

Glass panels in window frames

108
Q

Globe valve

A

Valve used primarily in air and steam systems to control the rate of flow

109
Q

Galvanized metal

A

Sheet metal or iron covered with a protective coating to resist corrosion

110
Q

Heat exchanger

A

Device specifically designed to transfer heat between two physically separated fluids

111
Q

Gypsum

A

Soft, hydrous calcium sulfate used in construction materials such as wallboard and sheathing

112
Q

Heat pump

A

Electric device that uses a compressor to drive refrigeration cycles to move heat from one medium to another. Device capable of providing heating or cooling by reversing its operation

113
Q

Galvanic action

A

Wasting away effect that occurs when two dissimilar metals are in contact in the presence of an electrolyte or an electric current

114
Q

Gate valve

A

Valve having two inclined seats between which the valve wedges down in closing

115
Q

Gauge pressure

A

Gas or liquid pressure reading (psig or pounds per square inch) that factors in the 14.7 psia, so a reading of zero on the gauge is equivalent to atmospheric pressure

116
Q

Gilsonite

A

Natural, resinous, hydrocarbon similar to hard petroleum asphalt and frequently used to harden softer petroleum products

117
Q

Hydropneumatic pressure system

A

System where water is pumped from a water supply into a pressure tank for storage

118
Q

Impact isolation class IIC

A

Rating of the ability of flooring systems to attenuate impact sounds and vibrations

119
Q

Loam

A

Soil consisting of a friable mixture of varying proportions of clay, silt and sand

120
Q

Metering device

A

Device that controls the flow of refrigerant into the evaporator in a refrigeration system; located between the condenser and evaporator (between high and low sides)

121
Q

Mullions

A

Member that forms the sides of the frames that hold window glass

122
Q

Micron

A

Unit of measure equal to a micrometer (one-millionth of a meter)

123
Q

Mortar

A

Mixture of lime and/or pulverized clay (cement) with very fine sand and water, used with a binding agent

124
Q

Needle valve

A

Valve that, as it closed, lowers a tapered pin into a fitted seat, which allows for very precise throttling

125
Q

Noble

A

Having low chemical reactivity; chemically inert or inactive

126
Q

Oxidize

A

Combine with oxygen; to dehydrogenate especially by the action of oxygen

127
Q

Ozone

A

A triatomic very reactive form of oxygen that is a bluish irritating gas of a pungent odor, that is a major air pollutant in the lower atmosphere but a beneficial component of the upper atmosphere, and that is used for oxidizing, bleaching, disinfecting, and deodorizing

128
Q

Plumbing

A

Interior water distribution system

129
Q

Pigment

A

Paint element that provides the color

130
Q

Path of travel

A

Continuous route from the entrance to a primary function area

131
Q

Partition

A

Wall assembly that completely encloses a space and thus makes it a room. Full-height wall that joins the suspended ceiling, constructed from wood or metal studs and gypsum board or other sheet material such as plywood

132
Q

Parts per million ppm

A

Measure of the concentrations of various water impurities, such as calcium, silica, iron and alkalinity

133
Q

Payment bond

A

Protection for certain laborers, material suppliers and subcontractors against nonpayment

134
Q

Peat

A

Turf that is partially carbonized vegetable tissue formed by partial decomposition in water of various plants

135
Q

Performance Bond

A

Written form of security from a surety (bonding) company to the owner on behalf of an acceptable prime or main contractor or subcontractor

136
Q

Performance Criteria

A

Performance standards to be met in the space

137
Q

Perimeter scuppers

A

Penetrations through a parapet wall and tied into the drainage system

138
Q

Perlite and vermiculite

A

Material used for its insulating characteristics in preformed insulating boards and lightweight insulating concrete, or blown loose into vacant spaces between structural members

139
Q

pH

A

A measure of the relative acidity or alkalinity of a solution. A pH under 7.0 indicates acidity; a pH greater than 7.0 indicates alkalinity

140
Q

Pitting corrosion

A

The corrosion of metal in very small areas, resulting in holes that may completely penetrate the metal

141
Q

Plenum

A

The space between acoustical tile in a suspended ceiling and the underside of the floor above, especially one that receives air from a blower for distribution

142
Q

Plywood

A

A building material made by laminating several thin layers of wood together

143
Q

Pointing

A

the troweling of mortar into a joint after the masonry units are laid

144
Q

Polymer

A

A chemical compound or mixture of compounds formed by polymerization (a chemical reaction in which two or more molecules combine to form larger molecules) and consisting essentially of repeating structural units

145
Q

Pressure Drop

A

The difference in pressure between two points. In a plumbing system, pressure drop factors include the length of run, the number of elbows, and the size of piping

146
Q

Preventative Maintenance

A

Preserving the performance expected from the equipment or system and involves systematic inspection, lubrication, adjustment, diagnostic testing and correction

147
Q

Primary function area

A

Any area where major activity takes place, including stores, offices, and work areas

148
Q

Primer

A

A preliminary paint coat that, when applied to a bare surface, seals pores in the surface and improves paint adhesion

149
Q

Punch list

A

A list of deficiencies in construction compiled by the project manager or architect near the end of a job. The list should record all incomplete, missing, or substandard items, and the action to be taken by the contractor to correct each problem.

150
Q

Rabbet

A

The channel or groove provided in a window sash to hold the pain in place

151
Q

Radiation

A

The transfer of heat by electromagnetic waves from a warm substance to a cooler substance without heating the medium in between

152
Q

Rectifier

A

An electrical device used to convert alternating current to direct current

153
Q

Recommissioning

A

commissioning to buildings that have previously been commissioned and involves revisiting the systems at regular intervals

154
Q

Reflectance (reflectivity)

A

the fraction of incoming radiant energy that is reflected from a surface

155
Q

Relative humidity (RH)

A

The ratio of the actual amount of water in the air compared to the maximum amount of water that the air could hold at the same temperature

156
Q

Repointing

A

the filling in of cut-out or defective mortar joints in masonry with fresh mortar

157
Q

Sandstone

A

A sedimentary rock that is made up mostly of tiny grains of quartz and has a sandpaper-like texture

158
Q

Sacrificial anode

A

A zinc-rich primer in which the zinc in the paint corrodes instead of the iron or steel surface to which it is applied

159
Q

R-value

A

A measure of the thermal resistance of a specific material. Under steady conditions, the mean temperature difference between the two surfaces separated by the insulation. The higher the R-value, the greater the resistance

160
Q

Rodding

A

Method of removing scale from the inside of piping by using rotary brushes or specialized cutters or drill heads affixed to a long rod

161
Q

Right-of-way ROW

A

An agreement that confers on an individual, company, or municipality the right to use a landowner’s property in some way

162
Q

Return air

A

Air pulled from a space and returned to the central air-conditioning plant for reconditioning

163
Q

Retrofit

A

Renovation of an existing system to update outmoded features to current standards of usability and code compliance

164
Q

Retro-commissioning

A

Commissioning performed in existing buildings that have never been commissioned

165
Q

Request for Quotation RFQ

A

Generally equivalent to the RFP, a second request for uniform, detailed information from prospective practitioners being screened for a project

166
Q

Request for Qualifications RFQ

A

A request for firms’ or project teams’ qualifications; helps to assess the teams’ ability to perform and complete the requirements of the project

167
Q

Request for proposal RFP

A

A type of bid document used to solicit proposals from prospective practitioners of products or services

168
Q

Request for Information RFI

A

An invitation to contractors to submit information about their firms. No proposal or bid is included.

169
Q

Space Utilization standards

A

Identify the space needed for each job title, function, or level within an organization

170
Q

Sound Transmission Class STC

A

A measure of how well a sound barrier prevents sound from passing through it

171
Q

Solvent

A

A solution that thins paint by dissolving or dispersing the binder

172
Q

Soffit

A

The underside of a part or member of a building (as of an overhang or staircase); especially the interior curve of an arch

173
Q

Sling psychrometer

A

A device with dry-bulb and wet-bulb thermometers used for checking air conditions, temperature, and humidity

174
Q

Site coverage

A

The percentage of the lot that can be covered by the structure

175
Q

Silt

A

Loose sedimentary soil with small rock particles

176
Q

Sill

A

The horizontal member forming the bottom of a window or exterior door frame. (sill plate)

177
Q

Silica

A

Silicon dioxide SiO2 occurring in crystalline, amorphous, and impure forms (as in quartz, opal, and sand respectively).

178
Q

Sick Building Syndrome SBS

A

The general discomfort, adverse reactions, or nonspecific sicknesses that appear to be linked to the time people spend in a particular building. Symptoms may include headaches, rashes, burning, teary eyes, or other irritations

179
Q

Shoring

A

a temporary vertical or horizontal support that holds up the formwork until the concrete cures or holds up the building element until structural integrity is established

180
Q

Setpoint

A

The desirable level of a variable at which a controller is set to maintain

181
Q

Service maintenance

A

Consists of lubricating equipment, changing filters, adjusting and replacing belts, and keeping equipment clean; meets the manufacturer’s basic recommendations and requires a minimum level of skill

182
Q

Sensible heat

A

Heat that when added to or removed from a particular substance causes a change in temperature, but not a change of state

183
Q

sash

A

The framework in which panes of glass are set in a window or door. Also called a glazing panel

184
Q

Thermoplastic

A

Capable of softening or fusing when heated and of hardening again when cooled

185
Q

Thermal envelope

A

Controls the comfort level inside by maintaining temperature and relative humidity RH

186
Q

Thermal

A

Of, relating to, or caused by heat

187
Q

Test fit

A

Part of the functional program, where existing or proposed buildings are examined to see if they can accommodate the estimated needed floor area as well as other functional and architectural requirements

188
Q

Terminal device

A

The end point, where the air dumps into the room

189
Q

Teratogenic

A

Of, relating to, or causing developmental malformations

190
Q

Surety bonds

A

An agreement under which the party called the surety agrees to answer another party called the obligee (the owner) for the debt, default, or failure to fulfill obligations of a third party called the principal (the contractor)

191
Q

Sump

A

a pit or reservoir serving as a drain or receptacle for liquids

192
Q

Structural envelope

A

The combination of the foundation, walls, and roofing working together to provide a safe environment

193
Q

Stress

A

The load per square inch that acts against an object

194
Q

Static pressure

A

The total pressure created by the fan velocity pressure, measured in inches of water (Pa)

195
Q

Statement of need

A

A written document stating all the decisions made during the needs assessment, taking into account space use standards and performance criteria

196
Q

Stack effect

A

an air filtration pattern in a building where air enters lower floors, rises within the building, and exits from upper floors due to the natural rising of warmer air. It occurs as a result of pressure differences created by a building’s air-handling system, the wind, and temperature differences

197
Q

spline

A

A thin metal or wood strip used in building construction

198
Q

spandrel panels

A

Opaque panels that conceal the floors, ceilings, and mechanical spaces of the building

199
Q

spalling

A

A defect that occurs when pieces of masonry or brick split or flake off a wall surface

200
Q

Vermiculite and perlite

A

Material used for its insulating characteristics in preformed insulating boards and lightweight insulating concrete, or blown loose into vacant spaces between structural members

201
Q

Ventilation

A

Movement of air into a building or from one space to another space within a building, using a fan.

202
Q

Velocity pressure

A

Pressure that is created when air moves in one direction

203
Q

Value engineering

A

A systematic, collaborative, and creative endeavor to evaluate a project’s components as a complete system and to ensure that the required functions are achieved at the lowest possible overall cost (without compromising on quality, safety, or dependability)

204
Q

U-value

A

The measure of heat conductivity of a material or structural unit, expressed as Btu per square foot per degree differences per hour; lower U-values provide greater resistance to heat transmissions

205
Q

Undercoat

A

The layer or layers of paint that cover a surface, build up film thickness, and furnish an even surface for the final coat

206
Q

Tuckpointing

A

A decorative method of pointing masonry with the surface mortar that is different from the bedding mortar

207
Q

Troubleshooting

A

The diagnostic process used to determine the cause of abnormal conditions in equipment`

208
Q

Travertine

A

A stone closely related to limestone but with impurities that give it a marble-like appearance; takes a polish and is used for its decorative effect, especially in building lobbies

209
Q

Transmittance

A

The rate of transfer of heat through one square meter of a structure divided by the difference in temperature across the structure

210
Q

Ton of refrigeration

A

A means of expressing cooling capacity. One ton equals 12,000 Btu/hour (or 288,000 Btu/day or 200 Btu/minute) of cooling

211
Q

Throttle

A

To regulate the rate of flow. In plumbing, a variety of valves can be used to throttle, shut off, or measure the flow of water.

212
Q

Thermostatic bypass

A

A device that allows air to exit the steam trap

213
Q

Zoning

A

The division of a building’s cooling and heating systems into sections that permit independent control of temperatures from one area to another

214
Q

zone

A

A distinct area of space to which conditioned air is delivered

215
Q

Winward

A

The side or direction from which the wind is blowing

216
Q

Wet-bulb temperature WB

A

A temperature measurement that takes into consideration the moisture content of the air

217
Q

Weather stripping

A

Metal or plastic material used in thin strips to ensure a weather-tight seal (where sashes and jams or sills come together)

218
Q

Watertube boiler

A

a boiler in which water or steam passes through tubes surrounded by the hot gases from combustion

219
Q

Watershed approach

A

A roofing design with positive and rapid drainage away from overlapped units, such as roofing shingles, on steep-sloped roofs

220
Q

Waterproof approach

A

A roofing design used on low-sloped and nearly flat roofs; requires a completely waterproof roofing membrane with seals at all terminations and penetrations

221
Q

water hammer

A

Vibration and loud banging in water pipes caused by oscillations in pressure, especially when valves are rapidly opened or closed

222
Q

Water closet

A

A compartment or room with a toilet

223
Q

Volatile organic compound VOC

A

A compound that evaporates, is gaseous at room temperature, and is released from used or stored products

224
Q

Viscosity

A

the internal resistance to flow; a measure of thickness

BOMI Design Oper & Maint Part I (11 decks)

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