2026 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)
Thez liquidz crystalz inz liquidz crystalz displayz (LCD)z technologyz isz suspendedz betweenz twoz glassz plates
andz thez crystalsz arez normallyz inz az twistedz configuration.z Whatz typez ofz lightz followsz thez orientation
ofz thez crystals,z andz isz allowedz toz passz through?z -z CORRECTz ANSWERz -Polarizedz Light.
Projectionz technologyz enablesz largerz displaysz thanz thosez ofz flatz panelz orz directz viewz TVz sets.z Wit
h
rear-projectionz TVz sets,z whatz doesz thez depthz ofz thez TVz setz dependz on?z -z CORRECTz ANSWERz -
Thez sizez ofz thez screen
Az customerz isz interestedz inz purchasingz az projectionz displayz andz asksz howz DLPz comparesz toz otherz t
echnologies.z Howz doesz DLPz technologyz comparez toz liquidz crystalz displayz (LCD)z technologyz andz relat
edz technologies,z suchz asz liquidz crystalz onz siliconz (LCoS)?z -z CORRECTz ANSWERz -
DLPz imagesz arez brighterz thanz thosez formedz fromz LCDz andz LCoSz technologies.
Az customerz isz interestedz inz purchasingz az videoz projectorz andz asksz aboutz thez differentz videoz display
technologies.z Whichz videoz displayz technologyz hasz strengthz thatz includez highz colorz saturationz andz c
olorz accuracy?z -z CORRECTz ANSWERz -Liquidz crystalz displayz (LCD)
Whilez muchz timez andz attentionz canz bez spentz choosingz az videoz projectorz technology,z choosingz the
correctz screenz shouldz playz anz equalz rolez inz thez homez theaterz experience.z Viewingz anglez andz gain
arez keyz parametersz whenz choosingz az screen.z Howz doesz gainz relatez toz viewingz angle?z -
CORRECTz ANSWERz -Thez higherz thez gain,z thez lowerz thez viewingz 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)
Thez liquidz crystalz inz liquidz crystalz displayz (LCD)z technologyz isz suspendedz betweenz twoz glassz plates
andz thez crystalsz arez normallyz inz az twistedz configuration.z Whatz typez ofz lightz followsz thez orientation
ofz thez crystals,z andz isz allowedz toz passz through?z -z CORRECTz ANSWERz -Polarizedz Light.
Projectionz technologyz enablesz largerz displaysz thanz thosez ofz flatz panelz orz directz viewz TVz sets.z Wit
h
rear-projectionz TVz sets,z whatz doesz thez depthz ofz thez TVz setz dependz on?z -z CORRECTz ANSWERz -
Thez sizez ofz thez screen
Az customerz isz interestedz inz purchasingz az projectionz displayz andz asksz howz DLPz comparesz toz otherz t
echnologies.z Howz doesz DLPz technologyz comparez toz liquidz crystalz displayz (LCD)z technologyz andz relat
edz technologies,z suchz asz liquidz crystalz onz siliconz (LCoS)?z -z CORRECTz ANSWERz -
DLPz imagesz arez brighterz thanz thosez formedz fromz LCDz andz LCoSz technologies.
Az customerz isz interestedz inz purchasingz az videoz projectorz andz asksz aboutz thez differentz videoz display
technologies.z Whichz videoz displayz technologyz hasz strengthz thatz includez highz colorz saturationz andz c
olorz accuracy?z -z CORRECTz ANSWERz -Liquidz crystalz displayz (LCD)
Whilez muchz timez andz attentionz canz bez spentz choosingz az videoz projectorz technology,z choosingz the
correctz screenz shouldz playz anz equalz rolez inz thez homez theaterz experience.z Viewingz anglez andz gain
arez keyz parametersz whenz choosingz az screen.z Howz doesz gainz relatez toz viewingz angle?z -
CORRECTz ANSWERz -Thez higherz thez gain,z thez lowerz thez viewingz angle.
