Chapter 16 Light and Lighting
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) What’s a lumen? 1) _______
A) Light emitted by a 1 candlepower source.
B) Light emitted within one steradian by a standard candle.
C) Light emitted by a standard candle in a 1 ft. radius sphere.
2) How many lumens are emitted by a standard candle? 2) _______
A) 12.57 B) 2045 C) 53.66
3) What is illumination? 3) _______
A) The candlepower incident on a surface.
B) Candela per unit area incident on a surface.
C) Lumens per unit area incident on a surface.
4) If the illumination from a point source 4 ft. above a surface is 100 foot-candles, what will be the
illumination level if the source is raised to 8 ft.?
4) _______
A) 10 foot-candles. B) 20 foot-candles. C) 50 foot-candles.
5) The illumination from a point source 4 ft. above a surface is 100 foot-candles, and the surface is
normal to the source. What will be the illumination level if the surface is tilted 45°?
5) _______
A) 50 foot-candles. B) 100 foot-candles. C) 71 foot-candles.
6) Which of the following statements are true regarding white light? Select all that apply. 6) _______
A) White light can only be produced by evenly mixing of all colors of the rainbow.
B) White light can be produced by many mixes of individual colors.
C) White is a color, having a distinct wave length.
D) Leaving any single color out will result in the light not being white.
7) What is value? 7) _______
A) The basic color, such as red, blue, or red-blue.
B) The shade of color, such as light or dark red.
C) The intensity or degree of color saturation.
8) What is chroma? 8) _______
A) The basic color, such as red, blue, or red-blue.
B) The shade of color, such as light or dark red.
C) The intensity or degree of color saturation.
9) What is hue? 9) _______
A) The basic color, such as red, blue, or red-blue.
B) The shade of color, such as light or dark red.
C) The intensity or degree of color saturation.
10) The quality of a light source having a smooth profile of spectral power distribution without
extremely narrow energy bands is called which of the following?
10)
______
A) Color correctness index (CCI). B) Color rendering index (CRI).
C) True color value (TCV). D) Color relation factor (CRF).
11) Which of the following statements is true regarding color temperature? Select all that apply. 11)
______
A) A candle emits light of a lower color temperature than the north sky.
B) The north sky color has a higher color temperature than a sunset.
C) The color temperature of red light is higher than the color temperature of blue light.
12) Which of the following statements is true about the use of light to render colors? Select all that
apply.
12)
______
A) Colors such as red and orange will be enhanced by warm lighting, e.g. incandescent.
B) Colors such as red and orange will appear washed out under cool lighting.
C) Colors such as blue and green will be enhanced by low color temperature lighting.
13) Which of the following statements is true about the use of light in spaces? Select all that apply. 13)
______
A) Warm sources would be good in a fast food restaurant.
B) Warm white light is preferred for sources used at low light levels.
C) Cool sources are preferred for high light levels.
D) Cool sources would be good in an elegant restaurant.
