2025 NCTI Consumer Digital Electronics
Questions with Correct Answers
What is the name of the group that established the initial technical standards for the television in
dustry, ensuring a single system would deliver consistent service across the nation? -
CORRECT ANSWER -The National Television System Committee (NTSC).
What signal modulation technique do cable operators use to transport digital television signals thr
ough the cable network? - CORRECT ANSWER -Quadrature amplitude modulation (QAM).
What is the major change in enhanced definition TV (EDTV) that improved picture quality over sta
ndard definition TV (SDTV)? - CORRECT ANSWER -The use of progressive scanning mode in EDTV.
What legislation required all television stations switch to digital-only broadcasting? -
CORRECT ANSWER -The U.S. Deficit Reduction Act.
Why are digital terminal adapters (DTA) more cost effective than a full-featured set-
top box (STB)? - CORRECT ANSWER -DTAs do not communicate RF upstream..
What terrestrial transmission technology did the Advanced Television Systems Committee (ATSC) sel
ect?. - CORRECT ANSWER -8-level vestigial sideband (8-VSB)
Which system advanced television to high definition (HD)? - CORRECT ANSWER -The multiple sub-
Nyquist sampling encoding (MUSE) system.
How do set-
top boxes (STB) typically connect to high definition televisions (HDTV) to provide the best picture
quality? - CORRECT ANSWER -
To provide the best HD picture, STBs typically connect to HDTVs via a High-
Definition Multimedia Interface (HDMI).
What inexpensive device is used by cable operators to provide digital TV (DTV) services to all of t
heir customers? - CORRECT ANSWER -A digital terminal adapter (DTA).
, Which technology enables cable operators to control access to services by encrypting the program
ming? - CORRECT ANSWER -Conditional access (CA).
Which statement below is correct in describing the internal process of a cathode ray tube (CRT)? -
CORRECT ANSWER -
Magnetically directed electron beams, from electron guns, horizontally move back and forth, sendi
ng electron beams through a shadow mask.
Which type of TV technology had to overcome early disadvantages such as weak contrast, a lag or
trail effect where fast-
moving images appear to "smear" and screen door effect where viewers see a visible pixel structu
re at close range? - CORRECT ANSWER -Liquid crystal display (LCD)
The liquid crystal in liquid crystal display (LCD) technology is suspended between two glass plates
and the crystals are normally in a twisted configuration. What type of light follows the orientation
of the crystals, and is allowed to pass through? - CORRECT ANSWER -Polarized Light.
Projection technology enables larger displays than those of flat panel or direct view TV sets. With
rear-projection TV sets, what does the depth of the TV set depend on? - CORRECT ANSWER -
The size of the screen
A customer is interested in purchasing a projection display and asks how DLP compares to other t
echnologies. How does DLP technology compare to liquid crystal display (LCD) technology and relat
ed technologies, such as liquid crystal on silicon (LCoS)? - CORRECT ANSWER -
DLP images are brighter than those formed from LCD and LCoS technologies.
A customer is interested in purchasing a video projector and asks about the different video display
technologies. Which video display technology has strength that include high color saturation and c
olor accuracy? - CORRECT ANSWER -Liquid crystal display (LCD)
While much time and attention can be spent choosing a video projector technology, choosing the
correct screen should play an equal role in the home theater experience. Viewing angle and gain
are key parameters when choosing a screen. How does gain relate to viewing angle? -
CORRECT ANSWER -The higher the gain, the lower the viewing angle.
Questions with Correct Answers
What is the name of the group that established the initial technical standards for the television in
dustry, ensuring a single system would deliver consistent service across the nation? -
CORRECT ANSWER -The National Television System Committee (NTSC).
What signal modulation technique do cable operators use to transport digital television signals thr
ough the cable network? - CORRECT ANSWER -Quadrature amplitude modulation (QAM).
What is the major change in enhanced definition TV (EDTV) that improved picture quality over sta
ndard definition TV (SDTV)? - CORRECT ANSWER -The use of progressive scanning mode in EDTV.
What legislation required all television stations switch to digital-only broadcasting? -
CORRECT ANSWER -The U.S. Deficit Reduction Act.
Why are digital terminal adapters (DTA) more cost effective than a full-featured set-
top box (STB)? - CORRECT ANSWER -DTAs do not communicate RF upstream..
What terrestrial transmission technology did the Advanced Television Systems Committee (ATSC) sel
ect?. - CORRECT ANSWER -8-level vestigial sideband (8-VSB)
Which system advanced television to high definition (HD)? - CORRECT ANSWER -The multiple sub-
Nyquist sampling encoding (MUSE) system.
How do set-
top boxes (STB) typically connect to high definition televisions (HDTV) to provide the best picture
quality? - CORRECT ANSWER -
To provide the best HD picture, STBs typically connect to HDTVs via a High-
Definition Multimedia Interface (HDMI).
What inexpensive device is used by cable operators to provide digital TV (DTV) services to all of t
heir customers? - CORRECT ANSWER -A digital terminal adapter (DTA).
, Which technology enables cable operators to control access to services by encrypting the program
ming? - CORRECT ANSWER -Conditional access (CA).
Which statement below is correct in describing the internal process of a cathode ray tube (CRT)? -
CORRECT ANSWER -
Magnetically directed electron beams, from electron guns, horizontally move back and forth, sendi
ng electron beams through a shadow mask.
Which type of TV technology had to overcome early disadvantages such as weak contrast, a lag or
trail effect where fast-
moving images appear to "smear" and screen door effect where viewers see a visible pixel structu
re at close range? - CORRECT ANSWER -Liquid crystal display (LCD)
The liquid crystal in liquid crystal display (LCD) technology is suspended between two glass plates
and the crystals are normally in a twisted configuration. What type of light follows the orientation
of the crystals, and is allowed to pass through? - CORRECT ANSWER -Polarized Light.
Projection technology enables larger displays than those of flat panel or direct view TV sets. With
rear-projection TV sets, what does the depth of the TV set depend on? - CORRECT ANSWER -
The size of the screen
A customer is interested in purchasing a projection display and asks how DLP compares to other t
echnologies. How does DLP technology compare to liquid crystal display (LCD) technology and relat
ed technologies, such as liquid crystal on silicon (LCoS)? - CORRECT ANSWER -
DLP images are brighter than those formed from LCD and LCoS technologies.
A customer is interested in purchasing a video projector and asks about the different video display
technologies. Which video display technology has strength that include high color saturation and c
olor accuracy? - CORRECT ANSWER -Liquid crystal display (LCD)
While much time and attention can be spent choosing a video projector technology, choosing the
correct screen should play an equal role in the home theater experience. Viewing angle and gain
are key parameters when choosing a screen. How does gain relate to viewing angle? -
CORRECT ANSWER -The higher the gain, the lower the viewing angle.
