EXAM: AVIXA CTS-D: Display Environment Test|49
Questions and Answers 100% Pass
Incident Meter CORRECT ANS-Measures light coming directly from a source such as a light
bulb, projector, or monitor
EXAM: AVIXA CTS-D: Display Environment Test|49
Questions and Answers 100% Pass
Incident Meter CORRECT ANS-Measures light coming directly from a source such as a light
bulb, projector, or monitor
Reflected/Spot Meter CORRECT ANS-Measures the light that bounces off of an object like a
projection screen or work surface. These types of meters can also be used to measure the
light emitting from a monitor, rear projection screen, or LED sign. An AV professional can use
spot measurements and total surface area to calculate the proper lamp size required for a
specific task.
Foot-Candles CORRECT ANS-A measurement of the light falling on an incidental light meter
at a given distance from the source
Lumen CORRECT ANS-Is a measure of the light quantity emitted from a constant light
source across one square meter
Foot-Candle (fc) CORRECT ANS-English unit of measurement expressing the intensity of
light illuminating an object. The illumination from one candle falling on a surface of 1 square
foot at a distance of 1 foot.
, EXAM: AVIXA CTS-D: Display Environment Test|49
Questions and Answers 100% Pass
Lux CORRECT ANS-Is a contraction of the words luminance and flux; 10.7 lux is equal to 1
footcandle
Standards for Lumen measurement CORRECT ANS-ANSI/NAPM IT7.228-1997 (ret. 2003)
ANSI/PIMA IT7.227-1998 (ret. 2003)
Now maintained in:
IEC 61947-1 and 61947-2
Candela per Meter Squared (cd/m²) CORRECT ANS-measurement of light reflected off a
screen, the value of which depends upon the intensity of the light and screen gain
Candela CORRECT ANS-measures luminance, is the luminous intensity of a source that
emits monochromatic radiation of frequency 540 × 1012 hertz, and has a radiant intensity in
that direction of 1 ⁄ 683 watt per steradian. The candela has replaced the candlepower
standard
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