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)
Thec liquidc crystalc inc liquidc crystalc displayc (LCD)c technologyc isc suspendedc betweenc twoc glassc plates
andc thec crystalsc arec normallyc inc ac twistedc configuration.c Whatc typec ofc lightc followsc thec orientation
ofc thec crystals,c andc isc allowedc toc passc through?c -c CORRECTc ANSWERc -Polarizedc Light.
Projectionc technologyc enablesc largerc displaysc thanc thosec ofc flatc panelc orc directc viewc TVc sets.c Wit
h
rear-projectionc TVc sets,c whatc doesc thec depthc ofc thec TVc setc dependc on?c -c CORRECTc ANSWERc -
Thec sizec ofc thec screen
Ac customerc isc interestedc inc purchasingc ac projectionc displayc andc asksc howc DLPc comparesc toc otherc t
echnologies.c Howc doesc DLPc technologyc comparec toc liquidc crystalc displayc (LCD)c technologyc andc relat
edc technologies,c suchc asc liquidc crystalc onc siliconc (LCoS)?c -c CORRECTc ANSWERc -
DLPc imagesc arec brighterc thanc thosec formedc fromc LCDc andc LCoSc technologies.
Ac customerc isc interestedc inc purchasingc ac videoc projectorc andc asksc aboutc thec differentc videoc display
technologies.c Whichc videoc displayc technologyc hasc strengthc thatc includec highc colorc saturationc andc c
olorc accuracy?c -c CORRECTc ANSWERc -Liquidc crystalc displayc (LCD)
Whilec muchc timec andc attentionc canc bec spentc choosingc ac videoc projectorc technology,c choosingc the
correctc screenc shouldc playc anc equalc rolec inc thec homec theaterc experience.c Viewingc anglec andc gain
arec keyc parametersc whenc choosingc ac screen.c Howc doesc gainc relatec toc viewingc angle?c -
CORRECTc ANSWERc -Thec higherc thec gain,c thec lowerc thec viewingc 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)
Thec liquidc crystalc inc liquidc crystalc displayc (LCD)c technologyc isc suspendedc betweenc twoc glassc plates
andc thec crystalsc arec normallyc inc ac twistedc configuration.c Whatc typec ofc lightc followsc thec orientation
ofc thec crystals,c andc isc allowedc toc passc through?c -c CORRECTc ANSWERc -Polarizedc Light.
Projectionc technologyc enablesc largerc displaysc thanc thosec ofc flatc panelc orc directc viewc TVc sets.c Wit
h
rear-projectionc TVc sets,c whatc doesc thec depthc ofc thec TVc setc dependc on?c -c CORRECTc ANSWERc -
Thec sizec ofc thec screen
Ac customerc isc interestedc inc purchasingc ac projectionc displayc andc asksc howc DLPc comparesc toc otherc t
echnologies.c Howc doesc DLPc technologyc comparec toc liquidc crystalc displayc (LCD)c technologyc andc relat
edc technologies,c suchc asc liquidc crystalc onc siliconc (LCoS)?c -c CORRECTc ANSWERc -
DLPc imagesc arec brighterc thanc thosec formedc fromc LCDc andc LCoSc technologies.
Ac customerc isc interestedc inc purchasingc ac videoc projectorc andc asksc aboutc thec differentc videoc display
technologies.c Whichc videoc displayc technologyc hasc strengthc thatc includec highc colorc saturationc andc c
olorc accuracy?c -c CORRECTc ANSWERc -Liquidc crystalc displayc (LCD)
Whilec muchc timec andc attentionc canc bec spentc choosingc ac videoc projectorc technology,c choosingc the
correctc screenc shouldc playc anc equalc rolec inc thec homec theaterc experience.c Viewingc anglec andc gain
arec keyc parametersc whenc choosingc ac screen.c Howc doesc gainc relatec toc viewingc angle?c -
CORRECTc ANSWERc -Thec higherc thec gain,c thec lowerc thec viewingc angle.
