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NCTI Consumer Digital Electronics Practice Exam Questions With Correct Answers 2023
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NCTI Consumer Digital ElectronicsPractice Exam Questions With Correct
Answers 2023
What is the name of the group that established the initial technical standards for the
television industry, ensuring a single system would deliver consistent service across the
nation? - AnswerThe National Television System Committee (NTSC).
What signal modulation technique do cable operators use to transport digital television
signals through the cable network? - AnswerQuadrature amplitude modulation (QAM).
What is the major change in enhanced definition TV (EDTV) that improved picture
quality over standard definition TV (SDTV)? - AnswerThe use of progressive scanning
mode in EDTV.
What legislation required all television stations switch to digital-only broadcasting? -
AnswerThe U.S. Deficit Reduction Act.
Why are digital terminal adapters (DTA) more cost effective than a full-featured set-top
box (STB)? - AnswerDTAs do not communicate RF upstream..
What terrestrial transmission technology did the Advanced Television Systems
Committee (ATSC) select?. - Answer8-level vestigial sideband (8-VSB)
Which system advanced television to high definition (HD)? - AnswerThe 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? - AnswerTo 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 their customers? - AnswerA digital terminal adapter (DTA).
Which technology enables cable operators to control access to services by encrypting
the programming? - AnswerConditional access (CA).
Which statement below is correct in describing the internal process of a cathode ray
tube (CRT)? - AnswerMagnetically directed electron beams, from electron guns,
horizontally move back and forth, sending 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 structure at close range? - AnswerLiquid
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? -
AnswerPolarized 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? -
AnswerThe size of the screen
A customer is interested in purchasing a projection display and asks how DLP
compares to other technologies. How does DLP technology compare to liquid crystal
display (LCD) technology and related technologies, such as liquid crystal on silicon
(LCoS)? - AnswerDLP 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 color accuracy? - AnswerLiquid 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? - AnswerThe higher the gain, the lower the viewing angle.
What features of organic light emitting diode (OLED) display technology, make it an
attractive alternative to other television technologies? - AnswerColor, brightness, wide
viewing angle, durability, a thin light profile, and low energy consumption make OLED
technology an attractive alternative to other television technologies.
What is added to a rear-projection cathode ray tube (CRT) display in order to support a
16:9 aspect ratio, and become high definition TV (HDTV)-ready? - AnswerA digital-to-
analog (D/A) converter is added prior to the CRT's electron gun stage.
What are some commonalities of all projector displays? - AnswerLamp life, brightness,
lens type and variability, and connectivity.
What common device normally used by an installer during the installation of an
additional TV outlet, is found inside the VCR and is part of the A/B switch? -
AnswerTwo-way splitter.
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