ET Test 3
Reverberation times in common building spaces typically range between:
0.5 to 1.5 seconds
An electronic ballast uses solid state components to transform the frequency of the power from 60 HZ to:
20,000 HZ
It is estimated that electric lighting consumes __________ of the total electric power generated in the United States:
25%
Electric lighting in U.S. nonresidential buildings consumes:
25% to 60% of the electric energy utilized
The diameter of a whole-house residential drain should not be less than:
4 Inches (101.6 mm)
Lighting fixtures typically constitute the following percentage of the overall building budget:
4% to 5%
In a residence the illuminance recommendation for general lighting for passage areas:
50 - 100 lux
In a residence the illuminance recommendation for general lighting for kitchen:
500-1000 lux
Recommended reflectances for ceilings, walls, and floors (in that order) are approximately as follows:
80% 60% 30%
Sound transmission between spaces is the result of:
A barrier being set into vibration by incident sound energy
Composting toilets rely upon the following process for the breakdown of waste:
Aerobic digestion
Achieving good office-building acoustics is becoming increasingly difficult as a result of:
All of the above; The use of lighter structural materials, increased population density within office spaces, and generally open floor plans with few full-height dividers
A hose bibb is:
An exterior water spigot or faucet
A spectic tank is a component of which of the following:
An on-site sewage disposal system
Room Illuminance values are typically measured:
At the work plane
Sound, in architectural acoustics work, is best described as:
Audible signals
The law of diminishing returns suggests that:
Barriers with very high transmission loss values will often not be economically feasible
Which of the following lists includes only real solar water heating system types?
Batch, drain-back, and drain-down
The relationship between sound and vibration can best be described in the following way:
Both are a series of pressure variations in an elastic medium
The measurement unit ppm is generally used to describe:
Chemical concentrations in water
The term octave as used in architectural acoustics implies:
A doubling of frequency
The most commonly used methods for disinfection of potable water are:
Chlorination, nanofiltration, ultraviolet radiation, and ozonation
The primary purpose of a sanitary drainage vent system is to:
Control pressure differences that might otherwise siphon traps
In a typical situation, doubling the amount of acoustic absorption will:
Decrease the ambient noise level by 3 dB
The acronym "DHW" stands for:
Domestic hot water
A ballast is required for correct operation of:
Electric (gaseous) discharge lamps
The basic principle of operation of an incandescent lamp is best described as:
Electric current heats a filament causing it to emit light
The basic principle of operation of a fluorescent lamp is best described as:
Electric current in a tube activates electrons that emit UV radiation that causes a coating to fluoresce and emit light
Illuminance levels and illuminance categories are used to:
Establish quantitative lighting system design criteria
Hard water is primarily caused by:
Excessive mineral content
Aeration is a process that can improve the taste and color of water by:
Exposing as much of the water's surface as possible to air
Xeriscape is an approach to:
Exterior landscaping design
Luminaire is the technical name for:
A lighting fixture
The difference between a luminaire and a lighting fixture can best be described in the following way:
A luminaire and a lighting fixture are the same thing
Reverberation is defined as:
A persistence of sound in a space after the sound source has stopped
All of the following terms are used to define coloration EXCEPT:
Opacity
The color rendering index (CRI) of a fluorescent lamp depends upon the:
Phosphor coating applied to the interior of the lamp
Plumbing codes provide:
Requirements for the minimum number of plumbing fixtures to be provided
The size of a cistern is dependent upon all of the following factors EXCEPT:
Roof slope
The unit used to express the total acoustic absorption of a material of given size is the:
Sabin
In the typical U.S. home the quantity of water used for bathing and personal hygiene is:
Slightly more than that used for clothes washing and dishwashing
The total absorption within a room (in Sabins) can be estimated by:
Summing all of the component absorptions within the room
Turbidity is a property of water that is caused by:
Suspended materials such as silt or plankton
A building service core can be best described as a:
Tall vertical element containing stairs, elevators, pipe risers, etc.
Fixture efficiency is directly affected by its:
Temperature
Articulation index (AI) expresses:
The ability to correctly hear spoken words
The apparent brightness of an object is dependent upon which of the following (choose two):
The adaptation level of the eye, and object luminance
The hydrologic cycle involves:
The continuous cycling of water from atmosphere to earth to atmosphere
Noise reduction (NR is best defined as:
The difference in sound intensity between two adjacent rooms
Water conservation in buildings is best achieved through:
The reservation of low quality water for all building tasks
STC (Sound transmission class) is a single-number rating that expresses:
The transmission loss of a barrier
The primary purpose of a drainage system trap is to:
To keep sewer gases from entering a building through a plumbing fixture
Supply water "fixture units" are used:
To size water distribution piping sytems
Graywater is best described as:
Waste water that is not from toilets or urinals
Lighting power density is expressed using which of the following units:
Watts per square foot (or square meter)
A luminaire that directs 0%-10% of its light output toward the ceiling is best classified as
direct
The following lamp type would be ideal for an industrial application
high-intensity discharge (HID)
Potable water is best described as water that is:
Fit for human consumption
The abbreviation IIC stands for:
Impact Isolation Class
The term anaerobic refers to a process that occurs:
In the absence of air
Filtration is water is undertaken primarily to:
Remove suspended materials
A diffuse sound field is desired within a theater. The following room treatment would best contribute to this acoustic characteristic:
A series of convexs panels are suspended from the entire ceiling
Light is best described as:
A small portion of a continuous range (or spectrum) of electromagnetic radiation
A cistern is best described as:
A storage tank for rainwater
How a particular acoustically absorbent material is installed will have:
A substantial effect on its performance
The most common on-site water source for North American buildings is:
A well
The distinction between a gutter and a leader is:
Gutters are external and leaders internal to a building envelope
In the process known as sound absorption, sound is converted to:
Heat
Frequency of sound is expressed in which of the following units:
Hertz
Masking refers to:
Hiding or blocking one sound with another
The mass law predicts that:
If the surface mass of a barrier is doubled, the transmission loss will increase 6 dB
The relationship between illuminance and luminance for an opaque surface is best described as:
Luminance and illuminance have the same magnitude, but opposite signs. Luminance is illuminance as modified by reflectance.
Match the lighting terminology below (column 1) with the parameter (column 2) it describes:
Luminous intensity is the output of a light source in some direction. Luminous flux is quantity of light leaving a source. Illuminance is density of light falling on a surface. Luminance is density of light leaving a surface.
An illuminance meter will provide readouts in which of the following signs:
Lux or footcandles
A porous material is mounted within a room in four different ways. The following installation method would be the least effective at providing absorption:
Mounted as a panel directly to the room surface
In the typical U.S. home, the quantity of water used for drinking and cooking is:
Much less than the quantity of water used to flush toilets
In an enclosed space, an echo will:
Normally diminish the quality of sound
A distributed emergency lighting system:
Places battery power sources for emergency lighting throughout a building
Light "pollution" differs from light "trespass" in that:
Pollution considers light in public areas, trespass considers light on private property
Match each of the following levels of sewage treatment (first column) with the device (second column) most likely to be used to provide that level of treatment (in a residential-scale system):
Primary treatment - septic tank. Secondary treatment - drainfield or disposal field. Tertiary treatment - chlorine injection.
Indirect lighting can accomplish all of the following EXCEPT:
Provide adequate illumination for all difficult seeing tasks
Noise reduction generally involves three strategies, best described as:
Quieting sources, reducing transmission, and making noise at the receiver
Sound that impinges on a material may be:
Reflected, absorbed, or transmitted
The total amount of absorption of a given material is a function of:
The material's surface area and its coefficient of absorption
Use of the term level in a sound measurement always denotes:
The measurement will be expressed in decibels
The size of a residential septic tank is generally based on code requirements that consider (Choose two):
The porosity of the surrounding soil and the number of bedrooms within the residence
Equivalent spherical illuminance (ESI) is primarily a measure of:
The quality of light falling on a task
Absorption coefficient for an acoustic material is best described as:
The ratio fo sound absorbed ro incident sound
Luminaire efficacy rating (LER) expresses:
The ratio of lumens leaving a fixture to lumens emitted by lamps
Efficacy of a light source is best defined as:
The ratio of lumens provided to energy used