BT$4 Exam 4 $4

What scale do we measure the CRI:

0 - 100

What is CRI stand for:

Color Rendering Index

Another word for Lumens per square foot:

Foot candle

How much light is being transmitted on a surface is called:

Transmitted factor

Light has both wave and particle properties a. True b. False

True

Direct glare can be classified by these categories: a. Discomfort glare and disability glare b. Discomfort glare and debilitative glare c. Disability glare and debilitative glare d. A and B

a. Discomfort glare and disability

Direct glare can be classified by these categories: a. Discomfort glare and disability glare b. Discomfort glare and debilitative glare c. Disability and debilitative glare d. A and B

a. Discomfort glare and disability glare

Light falling on any surface can be either: a. Reflected, transmitted or absorbed b. Refracted, transmitted or absorbed c. Transmitted and absorbed d. None of the above

a. Reflected, transmitted or absorbed

A CRI is a measure of how closely a lamp approximates daylight of the same color temperature: a. True b. False

a. True

A luminaire is also called a light fixture a. True b. False

a. True

A transparent material transmits the image of the light source while a translucent material diffuse the transmitted light and therefore obscures the image of the light source: a. True b. False

a. True

Daylight is usually estimated at the working plane: a. True b. False

a. True

Decorative lighting is meant to highlight architecture features: a. True b. False

a. True

Direct lighting: almost all of the light is directed down toward the workplace a. True b. False

a. True

Fluorescent lamps contain mercury a. True b. False

a. True

Fluorescent lamps contain mercury: a. True b. False

a. True

Fluorescent lamps have a higher efficacy than incandescent: a. True b. Falase

a. True

Good light design can be seen as a mixture of ambient daylight and task oriented lighting: a. True b. False

a. True

Good light design typically incorporates a mixture of ambient and task lighting: a. True b. False

a. True

In order to see the color of any object, it is necessary for the light source to contain the same color, otherwise the object will appear grey: a. True b. False

a. True

Indirect glare is also called "veiling reflections" a. True b. False

a. True

Indirect glare results from reflection of a light source on glossy or polished surfaces: a. True b. False

a. True

Indirect lighting: almost all of the light is directed up toward the ceiling: a. True b. False

a. True

It takes very large increases in illuminance level to achieve the same impact as a small change in contrast: a. True b. False

a. True

LEDs have higher efficacy than incandescent bulbs: a. True b. False

a. True

Light has both wave and particle properties: a. True b. False

a. True

Outdoor building illumination should come from the top rather than from the bottom: a. True b. False

a. True

Size/proximity of an object is the most important characteristic of a visual task: a. True b. False

a. True

The fraction of the heat from the sun that enters through a window is called Solar Heat Gain Coefficient: a. True b. False

a. True

The fraction of the heat from the sun that enters through a windows is called Solar Heat Gain: a. True b. False

a. True

To avoid problems of direct beam sun radiation, translucent glazing can be used on skylights: a. True b. False

a. True

A high pressure sodium lamp would make a good choice for an interior application: a. True b. False

b. False

Diffuse affects the quantity of the transmitted light. Frosted glass and clear glass transmit incident light in different quantities a. True b. False

b. False

It takes very large increases in levels to achieve the same impact as a small change in contrast: a. True b. False

b. False

Lumenance should have a very low surface brightness to encourage glare: a. True b. False

b. False

North light has less light in the blue end of the spectrum a. True b. False

b. False

Placing windows on more than one wall within a space whenever possible is not preferable: a. True b. False

b. False

Recommended illuminance levels are uniform throughout the world: a. True b. False

b. False

Solid state lamps contain mercury: a. True b. False

b. False

The human eye can easily adapt to two very different brightness levels simultaneously: a. True b. False

b. False

The work plane is measure at approximately 42" above the finished floor: a. True b. False

b. False 30" above the finished floor

The three main categories of light sources are: a. Discharge, fluorescent, halogen b. Incandescent, discharge, solid state c. Incandescent, Metal Halide, solid state d. Halogen, fluorescent, solid state

b. Incandescent, discharge, solid state

Illuminance is measured in: a. Lumens per cubic foot b. Lumens per square foot c. Candelas per square foot d. radiance per square foot

b. Lumens per square foot

The measure of how much light falling on a surface is being reflected is called a. Reflectance quanitity b. Reflectance factor c. Reactance factor d. None of the above

b. Reflectance factor

The measure of how much light is following on a surface that is being reflected is called: a. Reflectance quantity b. Reflectance factor c. Reactance factor

b. Reflectance factor

The ability of modify the color of the light incident on it is called: a. Selective coercion b. Selective absorption c. Spectral absorption d. Spectral coercion

b. Selective absorption

Graph that shows the relative energy of each color component in a light source is called: a. Spectral energy demonstration graph b. Special energy distribution graph c. Spectral energy distribution graph d. Spectral energy deviation graph

b. Spectral energy distribution graph

Lamp lumen depreciation can be described this way: a. The general trend of light fixture to produce the same amount of light as they age b. The general trend of lamps to produce less light as they age c. The general trend of light fixture to produce more light as they age d. None of the above

b. The general trend of lamps to produce less light as they age

The measure of how much light is transmitted by a surface compared to the incident light is called: a. Transarence factor b. Transmittance factor c. Transmittance power d. Transparence power e. None of the above

b. Transmittance factor

The fraction of the visible solar spectrum that goes through a window is called: a. Visible reflectance b. Visible transmittance c. Visible spectrum d. Solar infrared

b. Visible tansmittance

Antoni Gaudi used a light well to allow light to penetrate deeply into the interior space of his project in Barcelona called the Casa Battlo. What type of finish did he use for this space? a. Glossy paint b. Highly polished stone c. Blue tile d. Reflective glazing

c. Blue tile

Task lighting: a. Directs light in an ambient manner b. Directs light at the floor c. Directs light toward the working plane d. Directs light toward the ceiling

c. Directs light toward the working plane

Light is measure in: a. Hertz b. Wavelength c. Radiance d. A and B e. All of the above

d. A and B

Daylighting is an important design opportunity which can: a. Influence human behavior, health, and productivity b. Provide view and temporal connection with the outdoor c. Render the environment in a vivid range of experience and delight which is important to our ability to perceive space d. All of the above

d. All of the above

What is the goal of lamps shielding? a. To make the lamp more efficient b. To reduce the heat output of the lamp c. to protect the eye from seeing the bare lamp - a source of direct glare d. All of the above

d. All of the above

Metal - Halide lamps: a. Have high efficacy b. Have a high CRI c. Provide a good source of lighting for indoors and outdoors d. Contain mercury e. All of the above

e. All of the above

With regard to electric lighting, efficacy is: a. A measure of how effective a light source is in terms of service life b. The ratio of lumens to watts c. Inidcative of the efficiency of a light source - how well a light source produces light d. A and B e. B and C

e. B and C