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)
Thex liquidx crystalx inx liquidx crystalx displayx (LCD)x technologyx isx suspendedx betweenx twox glassx plate
s
andx thex crystalsx arex normallyx inx ax twistedx configuration.x Whatx typex ofx lightx followsx thex orientati
on
ofx thex crystals,x andx isx allowedx tox passx through?x -x CORRECTx ANSWERx -Polarizedx Light.
Projectionx technologyx enablesx largerx displaysx thanx thosex ofx flatx panelx orx directx viewx TVx sets.x Wi
th
rear-projectionx TVx sets,x whatx doesx thex depthx ofx thex TVx setx dependx on?x -x CORRECTx ANSWERx -
Thex sizex ofx thex screen
Ax customerx isx interestedx inx purchasingx ax projectionx displayx andx asksx howx DLPx comparesx tox other
xt
echnologies.x Howx doesx DLPx technologyx comparex tox liquidx crystalx displayx (LCD)x technologyx andx rel
at x imagesx arex brighterx thanx thosex formedx fromx LCDx andx LCoSx technologies
DLP
ed
. x technologies,x suchx asx liquidx crystalx onx siliconx (LCoS)?x -x CORRECTx ANSWERx -
Ax customerx isx interestedx inx purchasingx ax videox projectorx andx asksx aboutx thex differentx videox displ
ay
technologies.x Whichx videox displayx technologyx hasx strengthx thatx includex highx colorx saturationx andx
c
olorx accuracy?x -x CORRECTx ANSWERx -Liquidx crystalx displayx (LCD)
Whilex muchx timex andx attentionx canx bex spentx choosingx ax videox projectorx technology,x choosingx th
e
correctx screenx shouldx playx anx equalx rolex inx thex homex theaterx experience.x Viewingx anglex andx gai
n
arex keyx parametersx whenx choosingx ax screen.x Howx doesx gainx relatex tox viewingx angle?x -
CORRECTx ANSWERx -Thex higherx thex gain,x thex lowerx thex viewingx 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)
Thex liquidx crystalx inx liquidx crystalx displayx (LCD)x technologyx isx suspendedx betweenx twox glassx plate
s
andx thex crystalsx arex normallyx inx ax twistedx configuration.x Whatx typex ofx lightx followsx thex orientati
on
ofx thex crystals,x andx isx allowedx tox passx through?x -x CORRECTx ANSWERx -Polarizedx Light.
Projectionx technologyx enablesx largerx displaysx thanx thosex ofx flatx panelx orx directx viewx TVx sets.x Wi
th
rear-projectionx TVx sets,x whatx doesx thex depthx ofx thex TVx setx dependx on?x -x CORRECTx ANSWERx -
Thex sizex ofx thex screen
Ax customerx isx interestedx inx purchasingx ax projectionx displayx andx asksx howx DLPx comparesx tox other
xt
echnologies.x Howx doesx DLPx technologyx comparex tox liquidx crystalx displayx (LCD)x technologyx andx rel
at x imagesx arex brighterx thanx thosex formedx fromx LCDx andx LCoSx technologies
DLP
ed
. x technologies,x suchx asx liquidx crystalx onx siliconx (LCoS)?x -x CORRECTx ANSWERx -
Ax customerx isx interestedx inx purchasingx ax videox projectorx andx asksx aboutx thex differentx videox displ
ay
technologies.x Whichx videox displayx technologyx hasx strengthx thatx includex highx colorx saturationx andx
c
olorx accuracy?x -x CORRECTx ANSWERx -Liquidx crystalx displayx (LCD)
Whilex muchx timex andx attentionx canx bex spentx choosingx ax videox projectorx technology,x choosingx th
e
correctx screenx shouldx playx anx equalx rolex inx thex homex theaterx experience.x Viewingx anglex andx gai
n
arex keyx parametersx whenx choosingx ax screen.x Howx doesx gainx relatex tox viewingx angle?x -
CORRECTx ANSWERx -Thex higherx thex gain,x thex lowerx thex viewingx angle.
