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ARE exam > BS > Flashcards

BS Flashcards

1
Q

Hypothalamus

A

Acts as a thermostat within the human body

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2
Q

U-value

A

Thermal transmittance

U=1/R

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3
Q

Cooling capacity guidelines

A

Older home - 1 ton / 500 sf

New home - 1 ton / 1000 sf

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4
Q

Zeolite process

A

Used to soften water that has a high mineral content

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5
Q

Chlorination

A

Most common process used to disinfect drinking water

Chlorine kills bacteria and viruses

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6
Q

Ozonation and ultraviolet light

A

Two methods of removing harmful organisms from drinking water

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7
Q

Preaction sprinkler

A

Admit water into pipes after the system detects a fire
Water enters pipes as an alarm is sounded. Slight delay
Good application - where there would be a lot of water damage

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8
Q

Deluge system

A

All sprinkler heads open at the same time

Good application - where flammable materials are stored or where fire can spread very quickly

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9
Q

Photoelectric smoke detector

A

Pass a beam of light onto a sensor. Alarm sounds when beam is obscured by smoke

Smoke forms when fire reaches smoldering stage

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10
Q

Spot heat detectors

A

Of all types would detect a fire last

Detect changes in temperature of the space - after most deadly smoke stage

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11
Q

Declination angle

A

The angle of the earth’s axis relative to the position of the sun

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12
Q

Profile angle

A

The angle of the shadow that is cast by an overhang

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13
Q

Energy policy act of 1992 maximum dispensing rates

A

Shower heads - 2.5 gal per min
Toilets - 1.6 gal per flush
Faucets - 2.5 gal per min

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14
Q

Metal halide lamps

A

Sensitive to orientation
Designated with a proper burning position: base up, base down, horizontal, universal
Lose efficiency and lumen power if not installed correctly

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15
Q

Lamp with the highest and lowest life span

A

Highest (24,000 hours) high pressure sodium and mercury vapor

Lowest (2,000 hours) incandescent

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16
Q

Static head

A

The amount of pressure required to lift water through a piping system in a building

.433 can life water 1 foot

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17
Q

Degree day

A

Calculated by comparing the base temperature to the average temperature on a specific date in a specific location

Days average temperatures less than the base temperature you subtract to determine the number of heating degree days

Temperatures above base temp is recorded as cooling degree day

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18
Q

Dual duct system

A

Hot and cool air are both constantly available
Can provide heating and cooling simultaneously
Drawbacks: expensive, a lot of duct work, not very energy efficient

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19
Q

Building energy cost method

A

ASHREA 90.1 - energy cost budget
Allows the designer to compare the annual energy costs of the design building to a baseline building.
Design energy costs are less in the design building the building complies with the standard

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20
Q

System performance method

A

ASHREA 90.1 - energy cost budget
Complex calculations based upon a sites climate
Computer model often necessary

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21
Q

Prescriptive criteria method

A

ASHREA 90.1 - energy cost budget

Calculations to be completed relatively quickly but tends to be more restrictive than other methods

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22
Q

Blower door

A

A fan that can be mounted in a door frame. It is used to pressurize or depressurize a building to measure air infiltration or leakage

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23
Q

Nanometer

A

Measures differences in pressure between two spaces

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24
Q

Flow hood

A

Placed over a register or diffuser to measure output

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25
Q

Duct blower

A

Similar to blower hood but is attached directly to the ductwork to check for leaks

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26
Q

Creep

A

The reflection of sound along a curved surface (dome)

Sound can be heard along the way but not across the room

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27
Q

Diffusion

A

Sound is scattered all around a room as it is reflected from convex surfaces

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28
Q

Specular reflection

A

The reflection of sound off hard polished surfaces

29
Q

Dead space

A

Spaces that have short reverberation times

Highlight spoken-word presentations

30
Q

Live space

A

Spaces with long reverberations times

Musical presentations

31
Q

Vacuum breaker

A

A flap that opens to admit air if there is suction in a water pipe, which prevents siphoning of wastewater back into the clean water supply system

32
Q

Tone

A

A sound composed of a single frequency

33
Q

Note

A

Represents a specific frequency of wavelength

34
Q

Pitch

A

The number of complete wave forms per second

35
Q

Incandescent lamp shapes

A, PS, P, S, G, T, PAR, R, ER, MR

A 
A- arbitrary standard shape
PS- pear shape, straight neck
P- pear shape
S- straight
G- globe
T- tubular
PAR- parabolic aluminized reflector
R- reflector
ER - elliptical reflector
MR- miniature reflector
36
Q

Specific heat

A

The amount of heat in btu required to raise the temperature of one unit of mass one degree of temperature
Directly related to thermal storage capacity

37
Q

Centrifugal governor

A

Sets the brake and shuts off the power to an elevator

38
Q

Safety rail clamps

A

On an elevator

Wedge against the guide rail and stop the car smoothly

39
Q

Final-limit switches

A

Activated if the elevator overruns the safe limits of travel either up or down

40
Q

Buffers

A

Installed in the elevator put to cushion the elevator as it stops
Not capable of stopping a falling car

41
Q

Escalator travel speed and angle

A

Average 100 ft/min

Always installed at an angle of 30 degrees

42
Q

Brightness ratio

A

The relationship between the illumination levels of the surfaces within a persons field of vision

Max. Ideal brightness level ration between a task and the adjacent surroundings should be under 1:1/3

43
Q

Zonal cavity method

A

Allows a designer to calculate the number of fixtures required to producers specified number of footcandles

44
Q

Photoelectric cells

A

A type of perimeter security system

Pass a beam from one point to another. An alarm sounds when the beam is broken

45
Q

Pressure sensor

A

Detect changes in pressure on the floor cause by a person walking

46
Q

Ultrasonic detectors

A

Use a high frequency sound wave to sense intruders

47
Q

Photoelectric beans

A

Use infrared technology to protect space

Beam is broken by an intruders movements an alarm sounds

48
Q

SEER

A

Seasonal energy efficiency ratio

Residential air conditioning rating =13

49
Q

% added to total construction cost for a sprinkler system

A

New building adds 1%-1.5% to total construction cost

Retrofit - adds considerably more

50
Q

Curtain board

A

Draft curtain
Assembly suspended from the ceiling to prohibit movement of smoke and flame
Often used to protect openings in the floor such as escalators and mezzanines

51
Q

Fixture units

A

A measurement of the amount of water required to operate a plumbing fixture
Each fixture in a building can be added together to determine the buildings total demand and size plumbing pipes

Flush valve water closet - requires 10
Flush-tank toilet - 5
Washing machine - 1.4-3
Lavatories - 2

52
Q

Substation transformer

A

Tend to be very large

Always mounted on a concrete pad

53
Q

Distribution transformer

A

Smaller in size

Can be mounted either on a pole or a pad

54
Q

Sound intensity levels decrease

A

6 dB for every doubling of distance

55
Q

Centrifugal fan

A

Used for moving large amounts of air

Also called a squirrel cage

56
Q

Air sealing

A

The process of dealing ducts, openings and cracks to prevent air leakage

57
Q

Ohm’s law

A

If voltage goes up, current goes up. If voltage goes down, current will go down

58
Q

DC current

A

Current that flows only in one direction with constant voltage. Typically used for low voltage applications

59
Q

AC current

A

Direction of the flow can be reversed rapidly by reversing the voltage. Standard form of electrical current supplied by the utility grid

60
Q

Branch circuit

A

Insulated wires that run between the outlet and the panel box

61
Q

Fuse

A

A thin strip of metal that melts and breaks an electrical circuit if a current exceeds a safe level

62
Q

Interlocked armored cable (BX)

A

Pre wrapped set of wires encase I spiral armor made in the shop

63
Q

baffles

A

a shield of metal, wood or plastic used to screen a light source from normal angles of viewing

used to conceal the lamp and provide light cutoff

64
Q

ballast

A

supply controlled voltage to start the lamp
supply sufficient voltage to start the lamp by striking an arc
limit the current once the lamp is started

cold weather ballast, dimming ballast also available

65
Q

sound intensity level

A

the decible, how intense a sound is

66
Q

sound power level (PWL)

A

watts/cm^2, the power at the source

67
Q

sound pressure level (SPL)

A

the pressure exerted by the sound wave on a surface at a given location, varies with barromic pressure

68
Q

tapping machine

A

used to measure the degree of isolation of impact noises in a structure

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