fx | week 04 review

Question 1

what is the term for a unit of luminous intensity approximately equal to the output of a candle?

Answer 1

candlepower (cp)

Question 2

what is a lumen?

Answer 2

a unit of luminous flux equal to the amount light emitted per second in a unit solid angle of one steradian from a uniform source of one candela.

Question 3

what is the term for the density of luminous flux incident on a source in lumens per unit area (lm/m2)?

Answer 3

illuminance

Question 4

what is the term for luminous flux per unit of projected area and unit solid angle leaving a surface?

Answer 4

luminance

Question 5

what is the unit for luminance?

Answer 5

luminance = cd/m2

Question 6

how does direct glare differ from reflected glare?

Answer 6

direct glare results when a light source causes discomfort / interference with a visual task.

reflected glare results when a light source is reflected from a viewed surface into the eye.

Question 7

what is the visual comfort probability (vcp) factor?

Answer 7

the percentage of people who will find a situation acceptable in terms of discomfort glare.

Question 8

what is another name for reflected glare?

Answer 8

veiling reflection

Question 9

what is the simplest way of correcting reflected / veiling glare?

Answer 9

either move the task or move the light source.

Question 10

what is efficacy in terms of lighitng?

Answer 10

the ratio of luminous flux emitted over the total power output of the source.

Question 11

how does an incandescent lamp produce light?

Answer 11

incandescent lamps contain a tungsten filament placed within a sealed bulb filled with inert gas.

Question 12

what kind of lamp is designated by the shape of the lens + the diameter (measured in eighths of an inch)?

Answer 12

incandescent lamps

Question 13

which type of incandescent lamp shape results in the narrowest beam spread?

Answer 13

an mr16 low-voltage, mirrorless reflector

Question 14

what are the two available spread types for par + r lamp types?

Answer 14

flood spreads + spot lights

Question 15

what type of lamp contains a mixture of an inert gas + low-pressure mercury vapour?

Answer 15

fluorescent lamps

Question 16

what factors make up the designation of a fluorescent bulb?
ex: F40T12WW/RS

Answer 16

• fluorescent lamp
• wattage
• diameter of bulb (measured in eights of an inch)
• color
• starting circuitry

Question 17

what type of lamp produces light by passing an electric current through a gas or vapour under high pressure?

Answer 17

high-intensity discharge (hid)

Question 18

what is the color rendering index (cri)?

Answer 18

the measure of how well one source renders the color of an object when compared with a reference source of similar chromaticity with a cri of 100.

Question 19

what is light loss factor (llf)?

Answer 19

fraction representing the light that will be lost due to age of a lamp or grit covering the lamp.

Question 20

what is the noise reduction coefficient (nrc)?

Answer 20

a number value that describes the average sound absorption performance of a material.

Question 21

what is the range of nrc?

Answer 21

• 0.0 - reflects all sound
• .05 - absorbs half of sound
• 1.0 - absorbs all sound

Question 22

what is crocking resistance?

Answer 22

a material’s resistance to the transfer of color from a surface, when rubbed.

Question 23

what is the term for the initial amount of money required to purchase + install a product?

Answer 23

a first cost.

Question 24

what is a life-cycle cost?

Answer 24

the entire cost of a product over its life or the life of the building.

Question 25

which applications if linen recommended for?

Answer 25

draperies + wallcoverings.

Question 26

which synthetic fiber is often used as a replacement for wool?

Answer 26

acrylic

Question 27

which synthetic fibers are most often used as textile fabrics?

Answer 27

acetate, nylon, acrylic, olefin, and polyester.

Question 28

which natural fibers are most often used as textile fabrics?

Answer 28

wool, cotton, linen, silk, and rayon.

Question 29

simply, what is the manufacturing process for crypton?

Answer 29

crypton is as engineered fabric made by immersion in a chemical solution followed by a heat set to form a durable coating.

Question 30

what are benefits of crypton?

Answer 30

- stain, water, flame, and bacteria resistant - durable + fire resistant

Question 31

what is the most common cushioning material?

Answer 31

flexible polyurethane foam (fpf)

Question 32

what standard tests for flame propagation of textiles + films?

Answer 32

nfpa 701 - vertical ignition test (curtains, draperies, etc.)

Question 33

what standard tests for fire characteristics of upholstered furniture exposed to a flame ignition source?

Answer 33

nfpa 266

Question 34

what does nfpa 260 test for?

Answer 34

the resistance of upholstered furniture components, separately, to a flame and cigarette ignition.

Question 35

what does nfpa 261 test for?

Answer 35

the resistance of a seat cushion mockup (foam, liner, fabric) to a lighted cigarette.

Question 36

what does nfpa 266 test for?

Answer 36

the effect of an open flame on an actual sample chair.

Question 37

what standard is also known as the wyzenbeek abrasion test?

Answer 37

astm d4157

Question 38

what mechanism does the wyzenbeek abrasion test use to measure abrasion resistance?

Answer 38

double rubs.

Question 39

what standard is also know as the taber abrasion test?

Answer 39

astm d3884

Question 40

what is the most common material tested with a taber abraser?

Answer 40

carpet

Question 41

what standard is also known as the martindale abrasion test?

Answer 41

astm d4966

Question 42

what does astm d2261 test for?

Answer 42

the tearing strength of fabrics by a single tear.

Question 43

what is the difference in colorfastness test between aatcc 16 + aatcc 8?

Answer 43

aatcc 16 measures colorfastness due to light exposure aatcc 8 measures colorfastness due to crocking

Question 44

what does aatcc 147 test for?

Answer 44

the detection of bacteriostatic activity on textiles.

Question 45

what is attic stock?

Answer 45

extra materials that are required to be purchased under a project's contract + stored for future use.

Question 46

what is a warranty of title?

Answer 46

the seller has ownership of a product + can legally sell the product to others.

Question 47

what is an express warranty?

Answer 47

a specific claim or promise about a product's qualities or performance.

Question 48

what type of warranty is an implied promise by a merchant that what they are selling is fit for the ordinary purpose for which goods are sold?

Answer 48

a warranty of merchantability

Question 49

what type of warranty requires that something sold is suitable for the purpose it is sold for?

Answer 49

an implied warranty

Question 50

what is the standard method for determining voc emissions from office furniture systems?

Answer 50

ansi / bifma m7.1

Question 51

what is the standard method for formaldehyde + tvoc emissions of low-emitting office furntiture?

Answer 51

ansi / bifma x7.1

Question 52

what is the american national standard for office furnishings?

Answer 52

ansi / bifma / soho s6.5

Question 53

what is bifma g1?

Answer 53

the ergonomics guideline for furniture used in office work spaces designed for computer use.

Question 54

what is ansi / bifma e3?

Answer 54

the furniture sustainability standard

Question 55

what is a scribe piece?

Answer 55

an oversized piece of laminate or wood, trimmed in the field, to follow minor irregularities of a wall.