AVIXA CTS-D: Display Environment Exam
Questions and Answers
Incident Meter - Correct Answers -Measures light coming directly from a source such as
a light bulb, projector, or monitor
Reflected/Spot Meter - Correct Answers -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 Answers -A measurement of the light falling on an incidental
light meter at a given distance from the source
Bulb-Based projector derating - Correct Answers -Projectors will be brighter on the first
day of installation and will continue to decline in brightness over the lamp's life.
Useful lamp life - Correct Answers -generally considered to be at the 50% light output
point in the lamp's entire life. After or near the 50% point the lamp will not only get
dimmer, but will change its color temperature.
f-stop - Correct Answers -focal ratio: indicates the amount of light that is lost as it travels
through the lens. A full f-stop, going from f2 to f4 for instance, will cut the specified light
output in half
Lumen - Correct Answers -Is a measure of the light quantity emitted from a constant
light source across one square meter
Foot-Candle (fc) - Correct Answers -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.
Lux - Correct Answers -Is a contraction of the words luminance and flux; 10.7 lux is
equal to 1 footcandle
Standards for Lumen measurement - Correct Answers -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 Answers -measurement of light reflected
off a screen, the value of which depends upon the intensity of the light and screen gain
Candela - Correct Answers -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
Luminance (lighting) - Correct Answers -Luminance is the photometric quantity most
closely associated with one's perception of brightness. It usually refers to the amount of
light that reaches the eye of the observer measured in units of luminous intensity
(candelas) per unit area (m2).
Illuminance - Correct Answers -Light falling on a surface, measured in Lux (lx) or Foot-
Candle (ft-c or fc) [1 lux = 0.09 fc]. Not visible to human eye other than in the form of
reflected luminance
System Black - Correct Answers -the lowest level of luminance a system is capable of
producing for its task operating conditions. The system includes projector, screen, the
light the projector produces and ambient light
Contrast Ratio - Correct Answers -describes the dynamic video range of a display
device as a numeric relationship between the brightest color (typically white) and the
darkest color (typically black) that the system is capable of producing. Two methods are
used to specify contrast ratio; the full on/full off method describes the dynamic contrast
ratio and the ANSI measures the static contrast ratio.
PISCR - Correct Answers -ANSI/INFOCOMM 3M-2011 Projected Image System
Contrast Ratio (PISCR) standard was developed to ensure high quality images.
Passive Viewing Contrast Ratio - Correct Answers -7:1
Basic Decision Making Contrast Ratio - Correct Answers -15:1
Analytical Decision Making - Correct Answers -50:1
Full-motion Video (home theater) contrast ratio - Correct Answers -80:1
Contrast Measurement locations (3M Standard) - Correct Answers -1. Closest Left
viewing location
2. Closest Right viewing location
3. Center viewing location
Questions and Answers
Incident Meter - Correct Answers -Measures light coming directly from a source such as
a light bulb, projector, or monitor
Reflected/Spot Meter - Correct Answers -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 Answers -A measurement of the light falling on an incidental
light meter at a given distance from the source
Bulb-Based projector derating - Correct Answers -Projectors will be brighter on the first
day of installation and will continue to decline in brightness over the lamp's life.
Useful lamp life - Correct Answers -generally considered to be at the 50% light output
point in the lamp's entire life. After or near the 50% point the lamp will not only get
dimmer, but will change its color temperature.
f-stop - Correct Answers -focal ratio: indicates the amount of light that is lost as it travels
through the lens. A full f-stop, going from f2 to f4 for instance, will cut the specified light
output in half
Lumen - Correct Answers -Is a measure of the light quantity emitted from a constant
light source across one square meter
Foot-Candle (fc) - Correct Answers -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.
Lux - Correct Answers -Is a contraction of the words luminance and flux; 10.7 lux is
equal to 1 footcandle
Standards for Lumen measurement - Correct Answers -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 Answers -measurement of light reflected
off a screen, the value of which depends upon the intensity of the light and screen gain
Candela - Correct Answers -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
Luminance (lighting) - Correct Answers -Luminance is the photometric quantity most
closely associated with one's perception of brightness. It usually refers to the amount of
light that reaches the eye of the observer measured in units of luminous intensity
(candelas) per unit area (m2).
Illuminance - Correct Answers -Light falling on a surface, measured in Lux (lx) or Foot-
Candle (ft-c or fc) [1 lux = 0.09 fc]. Not visible to human eye other than in the form of
reflected luminance
System Black - Correct Answers -the lowest level of luminance a system is capable of
producing for its task operating conditions. The system includes projector, screen, the
light the projector produces and ambient light
Contrast Ratio - Correct Answers -describes the dynamic video range of a display
device as a numeric relationship between the brightest color (typically white) and the
darkest color (typically black) that the system is capable of producing. Two methods are
used to specify contrast ratio; the full on/full off method describes the dynamic contrast
ratio and the ANSI measures the static contrast ratio.
PISCR - Correct Answers -ANSI/INFOCOMM 3M-2011 Projected Image System
Contrast Ratio (PISCR) standard was developed to ensure high quality images.
Passive Viewing Contrast Ratio - Correct Answers -7:1
Basic Decision Making Contrast Ratio - Correct Answers -15:1
Analytical Decision Making - Correct Answers -50:1
Full-motion Video (home theater) contrast ratio - Correct Answers -80:1
Contrast Measurement locations (3M Standard) - Correct Answers -1. Closest Left
viewing location
2. Closest Right viewing location
3. Center viewing location
