2025 NCTI Consumer Digital Electronics Questions with Correct Answers

2025 NCTI Consumer Digital Electronics
Questions with Correct Answers
WhatWisWtheWnameWofWtheWgroupWthatWestablishedWtheWinitialWtechnicalWstandardsWforWtheWtelevisionWin
dustry,WensuringWaWsingleWsystemWwouldWdeliverWconsistentWserviceWacrossWtheWnation?W-
WCORRECTWANSWERW-TheWNationalWTelevisionWSystemWCommitteeW(NTSC).




WhatWsignalWmodulationWtechniqueWdoWcableWoperatorsWuseWtoWtransportWdigitalWtelevisionWsignalsWthr
oughWtheWcableWnetwork?W-WCORRECTWANSWERW-QuadratureWamplitudeWmodulationW(QAM).



WhatWisWtheWmajorWchangeWinWenhancedWdefinitionWTVW(EDTV)WthatWimprovedWpictureWqualityWoverWsta
ndardWdefinitionWTVW(SDTV)?W-WCORRECTWANSWERW-TheWuseWofWprogressiveWscanningWmodeWinWEDTV.



WhatWlegislationWrequiredWallWtelevisionWstationsWswitchWtoWdigital-onlyWbroadcasting?W-
WCORRECTWANSWERW-TheWU.S.WDeficitWReductionWAct.




WhyWareWdigitalWterminalWadaptersW(DTA)WmoreWcostWeffectiveWthanWaWfull-featuredWset-
topWboxW(STB)?W-WCORRECTWANSWERW-DTAsWdoWnotWcommunicateWRFWupstream..



WhatWterrestrialWtransmissionWtechnologyWdidWtheWAdvancedWTelevisionWSystemsWCommitteeW(ATSC)Wsel
ect?.W-WCORRECTWANSWERW-8-levelWvestigialWsidebandW(8-VSB)



WhichWsystemWadvancedWtelevisionWtoWhighWdefinitionW(HD)?W-WCORRECTWANSWERW-TheWmultipleWsub-
NyquistWsamplingWencodingW(MUSE)Wsystem.



HowWdoWset-
topWboxesW(STB)WtypicallyWconnectWtoWhighWdefinitionWtelevisionsW(HDTV)WtoWprovideWtheWbestWpictureW
quality?W-WCORRECTWANSWERW-
ToWprovideWtheWbestWHDWpicture,WSTBsWtypicallyWconnectWtoWHDTVsWviaWaWHigh-
DefinitionWMultimediaWInterfaceW(HDMI).



WhatWinexpensiveWdeviceWisWusedWbyWcableWoperatorsWtoWprovideWdigitalWTVW(DTV)WservicesWtoWallWofWt
heirWcustomers?W-WCORRECTWANSWERW-AWdigitalWterminalWadapterW(DTA).

, WhichWtechnologyWenablesWcableWoperatorsWtoWcontrolWaccessWtoWservicesWbyWencryptingWtheWprogram
ming?W-WCORRECTWANSWERW-ConditionalWaccessW(CA).



WhichWstatementWbelowWisWcorrectWinWdescribingWtheWinternalWprocessWofWaWcathodeWrayWtubeW(CRT)?W-
WCORRECTWANSWERW-

MagneticallyWdirectedWelectronWbeams,WfromWelectronWguns,WhorizontallyWmoveWbackWandWforth,Wsendi
ngWelectronWbeamsWthroughWaWshadowWmask.



WhichWtypeWofWTVWtechnologyWhadWtoWovercomeWearlyWdisadvantagesWsuchWasWweakWcontrast,WaWlagWor
WtrailWeffectWwhereWfast-

movingWimagesWappearWtoW"smear"WandWscreenWdoorWeffectWwhereWviewersWseeWaWvisibleWpixelWstructu
reWatWcloseWrange?W-WCORRECTWANSWERW-LiquidWcrystalWdisplayW(LCD)



TheWliquidWcrystalWinWliquidWcrystalWdisplayW(LCD)WtechnologyWisWsuspendedWbetweenWtwoWglassWplatesW
andWtheWcrystalsWareWnormallyWinWaWtwistedWconfiguration.WWhatWtypeWofWlightWfollowsWtheWorientation
WofWtheWcrystals,WandWisWallowedWtoWpassWthrough?W-WCORRECTWANSWERW-PolarizedWLight.




ProjectionWtechnologyWenablesWlargerWdisplaysWthanWthoseWofWflatWpanelWorWdirectWviewWTVWsets.WWithW
rear-projectionWTVWsets,WwhatWdoesWtheWdepthWofWtheWTVWsetWdependWon?W-WCORRECTWANSWERW-
TheWsizeWofWtheWscreen



AWcustomerWisWinterestedWinWpurchasingWaWprojectionWdisplayWandWasksWhowWDLPWcomparesWtoWotherWt
echnologies.WHowWdoesWDLPWtechnologyWcompareWtoWliquidWcrystalWdisplayW(LCD)WtechnologyWandWrelat
edWtechnologies,WsuchWasWliquidWcrystalWonWsiliconW(LCoS)?W-WCORRECTWANSWERW-
DLPWimagesWareWbrighterWthanWthoseWformedWfromWLCDWandWLCoSWtechnologies.



AWcustomerWisWinterestedWinWpurchasingWaWvideoWprojectorWandWasksWaboutWtheWdifferentWvideoWdisplay
Wtechnologies.WWhichWvideoWdisplayWtechnologyWhasWstrengthWthatWincludeWhighWcolorWsaturationWandWc

olorWaccuracy?W-WCORRECTWANSWERW-LiquidWcrystalWdisplayW(LCD)



WhileWmuchWtimeWandWattentionWcanWbeWspentWchoosingWaWvideoWprojectorWtechnology,WchoosingWtheW
correctWscreenWshouldWplayWanWequalWroleWinWtheWhomeWtheaterWexperience.WViewingWangleWandWgainW
areWkeyWparametersWwhenWchoosingWaWscreen.WHowWdoesWgainWrelateWtoWviewingWangle?W-
WCORRECTWANSWERW-TheWhigherWtheWgain,WtheWlowerWtheWviewingWangle.