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Flashcards in Building Systems 1 Deck (108)
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permeability

The property of permitting passage of water or water vapor through a material without causing rupture or displacement.

1

exhaust air

Any foul or unwanted air removed from a space by mechanical means.

2

wet standpipe

A vertical supply pipe for firefighting which is pressurized and filled with water to serve attached hoses on each floor within the building. A Siamese connection allows the water flow to be augmented from fire hydrants.

3

convection

The heat transfer process which occurs when a warm fluid rises, displacing cold fluid which then falls.

4

kilowatt (kW)

A unit of electric power equal to 1000 watts.

5

fan

A device consisting of a series of blades in a circular arrangement, driven by a motor or other prime mover to produce a current of air.

6

service

The portion of a building's electrical system extending from the utility company's wires to (and including) the main switch and meter.

7

dry pipe sprinkler

A sprinkler system whose pipes are normally pressurized with only air, thus being invulnerable to freezing temperatures. Upon actuation, the air is vented and supply pressure forces water through the system.

8

AC

The abbreviation for either air-conditioning or alternating current, depending on the context.

9

chlorination

The addition of small amounts of chlorine to a water source to kill bacteria.

10

dry standpipe

A vertical supply pipe for firefighting which is empty and must be connected to a fire hydrant by means of a Siamese connection and a pumper truck.

11

bibb

A faucet having a nozzle that is bent downward.

12

white noise

Innocuous background noise used to mask objectionable sounds.

13

echo

A sound wave that has been reflected with sufficient magnitude and delay so that it is heard as a sound distinct from that transmitted directly.

14

ASHRAE

The abbreviation for:

The American Society of Heating, Refrigerating and Air Conditioning Engineers

The source of most of the standardized information on the subject.

15

thermal mass storage wall

A wall whose mass is composed of concrete, masonry, or containers filled with water, the purpose of which is to absorb and store solar heat.

16

total pressure

The pressure measured by a pilot tube, consisting of static pressure and velocity pressure. The total pressure of a non-moving fluid is equal to it's static pressure.

17

battery

Two or more cells which utilize the reaction of a chemical solution on two dissimilar metals to produce an electromotive force.

18

globe valve

A valve consisting of a circular plug or disc which is raised or lowered against a circular opening or seat, used for adjusting or throttling flow.

19

ionization detector

A fire detector which detects the products of combustion (POC) even before they are visible to the naked eye.

20

vent stack

A vertical pipe which vents several sanitary drainage lines, in order to break the siphoning suction which would occur when water passes down through the system.

21

heat exchanger

Any device used for transferring heat from one fluid to another, where the fluids are physically separated.

22

UBC

The abbreviation for Uniform Building Code, one of the most widely-used model building codes in the United States.

23

solstice

Either June 21st (summer solstice) or December 21st (winter solstice), the first day of summer (or winter), the longest (or shortest) day of the year.

24

absolute humidity

The weight of water vapor per unit volume of air.

25

conduction

The transfer of heat by direct contact, from hotter molecules to cooler molecules.

26

degree day (dd)

The amount by which the average outdoor temperature at a particular location is below 65 degrees Farenheit for one day. Degree days may also be summed and stated for a month or a year.

27

wet bulb temperature (WBT)

The temperature attained by a glass thermometer whose bulb is covered with a wet sock and placed in an air stream moving at 1000 cubic feet per minute.

28

reverberation time

The time required for the sound pressure level to decrease 60dB after the original sound stops.

29

reflectance

The ratio of reflected to incident light falling on a surface.