ET Test 3

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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


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