Download TV Engineering QUESTION BANK - E

NEHRU ARTS AND SCIENCE COLLEGE
DEPARTMENT OF ELECTRONICS AND COMMUNICATION SYSTEM
QUESTION BANK
CLASS: II B.sc ELECTRONICS AND COMMUNICATION SYSTEM
SUBJECT: TELEVISION ENGINEERING
STAFF NAME: S. VENKATESAN
TELEVISION ENGINEERING
UNIT I
TELEVISION STANDARDS
Geometric form & Aspect ratio of the picture – Vertical scanning – Horizontal scanning – Number of
scanning lines – Interlaced scanning – Vertical and horizontal resolution –negative modulation – Complete
Channel
bandwidth – Reception of VSD Signals – allocation of Frequency band for TV signal Transmission –
Standards of
TV System – Complete channel bandwidth – Composite video signal – CCIR – B standards – camera tubes.
SECTION A
1.The normal aspect ratio of an Television picture is about ______
(1) 4/3 (2) 3/4 (3) 8/4 (4) 4/6
________ pulses are transmitted along with the picture information to acheive exact
2 congruence.
(1) Digital (2) Triggering (3) Synchronizing (4) Asynchronizing
3
The Storage Characteristics of the human eye is also named as ______
(1) Perception of Vision (2) Illusion (3) Persistence of Vision(4) None of these
4
In the present days, _____ still pictures of the scene are taken per second.
(1) Twenty - two (2) Twenty - five (3) Twenty - SIX (4) Twenty - four
5
Normally the frame repetition rate is about ______ in most television systems.
(1) 28 per second (2) 25 per second (3) 29 per second (4) 30 per second
6
The trace and retrace of several horizontal lines is named as an ______
(1) Horizontal - resolution (2) Vertical - Scanning (3) Vertical - resolution (4) Horizontal
Scanning
7
The maximum rise in an scanning system is called as an ______
(1) Raster (2) Trace (3) Retrace (4) Flyback
8
_______ ensures exact correspondence in scanning and distortionless reproduction of the
picture details.
(1) Horizontal Scanning (2) Reliability (3) Vertical Scanning (4)LOW Reliability
9
The ability of the scanning beam to allow reproduction of electrical signals is based on
_________
(1) Number of Scanning lines (2) Image resolution (3) Detail of an picture (4) None of
these
The total number of scanning lines that need to be employed is limited by the ______ of
10 the human eye.
(1) Resolving capability (2) Resolution factor (3) image (4)None of these
______ is very annoying to the observer when the screen is made alternatively bright and
11 dark.
(1) Image continuity (2) Flicker of light (3) Image perception(4) Image fidelity
In television pictures an effective rate of ______ vertical scans per second is utilized to
12 reduce flicker.
(1) 50 (2) 41 (3) 45 (4) 78
The process of Scaning from top to bottom and bottom to top without missing any single
13 lines is called as an ______
(1) Interlaced Scanning (2) Vertical Scanning (3) Horizontal Scanning (4) None of these
In an television system, the total number of lines divided into two groups is called as an
14 _______
(1) Trace (2) Fields (3) Raster (4) None of these
15
The normal duration of the horizontal line in an scanning period is about _____
(1) 68 - microseconds (2) 64 - microseconds (3) 66 - microseconds (4) 50 - microseconds
16
The Resolution factor (k) is also named as an ______
(1) Kell factor (2) Real - factor (3) Image factor (4) Refractive index
The frequency of the periodic wave which is minimum requirement in an TV - Systems is
17 about ______
(1) 9 MHz (2) 8 MHz (3) 5 MHz (4) 6 MHz
18
The normal resolution factor used in the television system is as about ____
(1) 0.89 (2) 0.79 (3) 0.59 (4) 0.69
The two major adjustments which is commonly used by the viewer in television system is
19 ____ & _____
(1) Brightness & Contrast (2) Dark & White (3) Sound & Power(4) Audio & Video
________ is the distance between the pedestal level and the average value (dc level) axis
20 of the Video signal.
(1) Flicker (2) Interlace error (3) Pedestal height (4) None of these
The Composite video signal contains ______ pulses to make the retrace invisible by
21 raising the signal amplitude during the scanning system.
(1) Blanking (2) Asynchronizing (3) Triggering (4)Synchronizing
The _______ is frequency modulated because of its inherent merits of interference - free
22 reception.
(1) Video - signal (2) Wave - signal (3) Wove - signal (4) Sound - signal
23
In the case of picture tubes, an _____ produces a narrow beam of electrons for scanning.
(1) Electron - beam (2) Ray (3) Electron - gun (4) Collision
24
A ______ may be called as the eye of a Television sysytem.
(1) Camera tube (2) Picture tube (3) Display screen (4) None of these
The normal duration of the horizontal line in an ___________period is about 64 micro
25 second.
(1) scunning (2) scanning (3) scarred (4) filter
SECTION B
1) Explain raster scan?
2) Explain Scan Lines?
3) Distinguish Signal modulation?
4)Define Interlaced scanning?
5)Define Standard-definition television?
SECTION C
1)Explain television?
2)Describe the theory of Display resolution?
3)Explain about VSB?
UNIT II
TELEVISION RECEIVER SECTION
Monochrome receiver block diagram – Receiving antennas – Balun – IF Filters RF tuners – VHF Stage and
Response – Video detector – sound section – video amplifiers DC restoration – Picture tubes.
SECTION A
1.VCA stands for_________
(1) Video CourseAnalysis (2) Video Content Analysis (3)Video Compute Analysis (4) Video Connect Analy
2
CRT stands for__________
(1) cathode rise tube (2) cathode ray tube (3) cathode raise tube (4) caro ray tube
3
vacuum tube containing an ________
(1) eltran gun (2) electron gule (3) electron gun (4) electron boom
4
In CRT internal or external means to accelerate and deflect the _________
(1) electron gun (2) electron beam (3) voltage beam (4)electron valve
5
The CRT uses an evacuated _________envelope
(1) gold (2) silver (3) glass (4) plastic
6
UHF stands for _______
(1) Ultra high frequency (2) Extra high frequency (3) Ultemate high frequency (4) Ultra
height frequency
7
VHF stands for_________
(1) Very height frequency (2) Very high frequency (3) Very humming frequency (4) none of
these
8
HDTV stands for__________
(1) Height defenition TV (2) High defenition TV (3) High define TV (4) High delete TV
9
Analog television cards output a _________ video stream
(1) rought (2) row (3) raw (4) right
10
A hybrid tuner has one tuner that can be configured to act as an _________ tuner
(1) digital (2) analog (3) current (4) hybrite
11
Most TV tuners are limited to the __________frequencies
(1) redio (2) radio (3) low radio (4) minimum radio
12
A radio receiver designed to amplify and convert the video and audio
radio____________signals
(1) voltage (2) frequency (3) current (4) none of these
13
In TV receiver,designer are usually designed with a ____________ circuit.
(1) superhaterodyne (2) superheterodyne (3)superoheterodyno (4) none of these
14
The tuner selects the signals of the desired channel and converts them to a ____________
frequency within the intermediate-frequency passband.
(1) lower (2) high (3) medium (4) fast
15
VIDAR stands for____________
(1) Video detection and raising (2) Video detection and ranging (3) Video done and
ranging (4) Video detection and rastor
16
RADAR stands for___________
(1) Radio done and ranging (2) Radio detection and raising (3)Radio detection and
ranging (4) Raise detection and ranging
17
Amp is an electronic device that ____________ the power of a signal.
(1) decrease (2) increases (3) constant (4) none of these
18
Current amplifier – This amplifier changes an input current to a ___________output current.
(1) meadium (2) reduce (3) larger (4) none of these
19
____________ tuner card is a kind of television tuner
(1) fan (2) radio (3) TV (4) light
20
TV tuner cards are most commonly __________bus expansion card
(1) DCI (2) ACI (3) PCI (4) VCI
21
Tuner to adjust the resonance frequency of an __________
(1) voltage (2) current (3) antenna (4) phase
22
IF stands for___________
(1) intermediate frequency (2) internal frequency (3) involved frequency (4) none of these
23
intermediate frequency (IF) is a frequency to which a __________ frequency is shifted as an
intermediate step in transmission or reception.
(1) line (2) voltage (3) carrier (4) low
24
ADC stands for_________
(1) Amplitude to digital (2) Analog to Digital (3) Amplitude digital convertor (4) none of
these
25
Analogue television receivers using system M: ___________ MHz (audio) and 45.75 MHz
(video)
(1) 41.29 (2) 41.25 (3) 31.25 (4) 41.35
SECTIONB
1) Explain Video Content Analysis?
2)Explain Sound TV ?
3)Define CRT?
4)Define amplifier?
5)Explain antenna?
SECTION C
1)Explain types of Television antenna?
2)Draw TV-block-diagram?
3)Explain types of tuners?
UNIT III
SYNC SEPARATOR
Sync separator – Basic principle – Noise in sync pulses – Vertical and horizontal sync separation –
Automatic frequency Control (AFC) – Horizontal AFC – Vertical and horizontal output stage – EHT
generation.
SECTION A
1)phase detector means supplied with a _________synchronizing signal.
(1) plane (2) vertical (3) horizontal (4) pline
2)horizontal deflection means for forming the ___________ signal .
(1) high (2) input (3) output (4) low
3A horizontal AFC circuit comprising a phase detector circuit supplied with a ___________synchronizing
signal.
(1) vertical (2) horizontal (3) balun (4) simultaneous
4AFC stands for __________
(1) Automatic Find Control (2) Automatic Freely Control (3)Automatic Frequency Control (4) Automatic
Frequency Compute
5In AFC,the bandpass frequency of a receiver is tuned to the frequency of a ____________.
(1) receiver (2) transmitter (3) current (4) amplitude
6The AFC circuit in the receiver develops an ________ voltage proportional to the degree to which the
receiver is mistuned.
(1) error (2) correct (3) low (4) high
7Image synchronization is achieved by transmitting ___________-going pulses
(1) low (2) positive (3) negative (4) high
8The horizontal sync signal is a single _________ pulse
(1) arrange (2) absoulte (3) long (4) short
9In CRT,the circuit inductances to resonate at a much ________ frequency.
(1) high (2) low (3) medium (4) abnormal
10The flyback transformer and rectifier circuitry into a single unit with a captive ____________lead.
(1) output (2) input (3) 0 (4) 2
11television synchronous deflection circuit is generally comprised of a first power supply for supplying a
__________
(1) A.C (2) D.C (3) A.CE (4) D.DC
12In Television synchronous deflection circuit,a first power supply circuit for supplying a D.C. voltage to the
horizontal ________circuit.
(1) CFC (2) DFC (3) AFC (4) defc
13Television synchronous deflection circuit,a second power supply circuit for smoothing the flyback pulse and
for supplying a predetermined __________ voltage to the synchronous separator.
(1) D.C (2) A.C (3) B.C (4) none of these
14AFC stands for__________
(1) Automatic frequency contract (2) Automatic frequency control (3) Automatic feiled
control (4) Automatic fail control
15ATV stands for__________
(1) Analog tv (2) Amplitude tv (3) And gate tv (4) none of these
16Automatic Frequency Control (AFC), also called __________
(1) AFT (2) AUT (3) AET (4) ANT
17In AFC ,bandpass frequency of a receiver is tuned to the frequency of a ______
(1) transmitter (2) receiver (3) raceiver (4) none of these
18DTv stands for_____________
(1) Died TV (2) Digital Tv (3) Done TV (4) Dual TV
19AFC stands for______________
(1) Automatic frequency control (2) Aline frequency control(3) Automatic frequency contrast (4) none of
these
20Analog signals vary over an infinite number of possible values which means that electronic noise and
interference becomes reproduced by the ____________.
(1) voltage (2) Transmitter (3) receiver (4) none of these
21Sound-in-Syncs is a method of ____________sound .
(1) reducing (2) multiplexing (3) reflecting (4) none of thses
22In scanning ,each frame is actually scanned twice interleaving odd and __________lines.
(1) low (2) even (3) high (4) none of these
23In scanning,Each scan is known as a ______________(odd and even fields.)
(1) frame (2) field (3) line (4) none of these
24Normal TV video bandwidth is _________ MHz.
(1) 7.0 (2) 6.0 (3) 5.0 (4) 8.0
25RF stands for___________
(1) Rase frequency (2) Rise frequency (3) Radio frequency (4)Range frequency
SECTION B
1) Explain horizontal AFC circuit comprising?
2) Define horizontal AFC?
3) Write a note an Automatic Frequency Control?
4) Explain Sync Separator?
5) Describe the CRT flyback power supply design and operation principles?
SECTIONC
1)Explain about Synchronization?
2)ExplainVertical synchronization?
3)Describe Horizontal hold and vertical hold?
UNIT IV
COLOUR TELEVISION
Nature of color – Color perception – Compatibility – Three colour theories – Chromaticity diagram –
Luminance and color difference signals – weighting factors – color picture tube – Bandwidth for color signal
transmission – PAL Color TV systems- Block diagram of color TV Receiver
SECTION A
1 Television (TV) is the most widely used ____________ for transmitting and receiving.
(1) tept communication medium (2) telecommunication medium (3) tole communication
medium (4) telecontact medium
2 The cathode ray tube (CRT) is a _________ tube containing an electron gun.
(1) vacome (2) vocuum (3) vacuum (4) valcuum
3 The cathode ray tube (CRT) is a vacuum tube containing an electron gun (a source of electrons) and a
_________ screen
(1) floorescent (2) fluorescent (3) fluorescont (4) fluoroscent
4 The RGB color model is an additive color model in which red, green, and _____
(1) bolue (2) blui (3) blue (4) bloe
5 Visible light corresponds to a small range of the electromagetic spectrum roughly from _________ nm .
(1) 800 (2) 300 (3) 500 (4) 400
6 SPD stands for ___________
(1) Spectral power distribution (2) Spectral power distorion(3) Spotra power distribution (4) Spectra power
distribution
7 The color matching experiment is the basis for the design of _________ TV
(1) Black (2) color (3) White (4) Red
8 Changing the wavelength of a monochromatic light changes the relative responses of the ________ cone
types.
(1) 2 (2) 4 (3) 3 (4) 5
9 Color opponency requires very specific wiring in the _____________.
(1) ratina (2) retina (3) ritina (4) ratesh
10 Analog (or analogue) television is the __________ transmission.
(1) voltage (2) current (3) digital (4) analog
11 Primary colors (or primary colours) are sets of colors that can be combined to make a useful range of
____________.
(1) current (2) voltage (3) colours (4) none of these
12 human color vision is ______________.
(1) trichromatch (2) trichromatic (3) Drichromatic (4)trichromo signal
13 The primary colors normally used are red, green, and __________.
(1) white (2) yellow (3) blue (4) orange
14 Subtractive combination of colors, as in mixing of ____________.
(1) picture (2) red (3) blue (4) pigments
15 RGB stands for______________
(1) red,glow,green (2) red,green,blue (3) red,gray,blue (4)none of these
16 Primary colors are not a fundamental property of _________ but are related to the physiological response of
the eye to light.
(1) colour (2) current (3) voltage (4) light
17 Media that combine emitted lights to create the sensation of a range of colors are using the ________color
system.
(1) additive (2) Addition multiplication (3) Addadive (4) none of these
18 Additive mixing of red and green light produces shades of yellow, orange, or __________.
(1) brown (2) blue (3) white (4) majenta
19 The color space that is generated is called an __________color space.
(1) RAB (2) RGB (3) RIB (4) rBB
20 CMY STANDS FOR_____________
(1) CYAN,MAJENTA,YELLOW (2) Cyan,Merun,Yellow (3)Cian,Merun,Yellow (4) CIAN,MEJENTA,YE
LLOW
21 The Secondary colors are orange (mix of red and yellow), green (mix of blue and yellow),
and__________(mix of blue and red).
(1) white (2) purple (3) merun (4) brown
22 In Subtractive color theory,Primary colors are ______________________.
(1) orange, cyan, and magenta (2) yellow, blue, and magenta (3)yellow, cyan, and magenta (4) none of these
23 A hue is a pure, spectral _____________.
(1) values (2) density (3) colour (4) none of these
24 Color values range from low key (very dark) to __________ key (very light).
(1) normal (2) abnormal (3) minimum (4) high
25 FCC Stands for__________________
(1) Faderal Communications Commission (2) Federal Communications Commission (3) Federal
Communications Correct (4) none of these
SECTION B
1) Write a note an PAL colour TV system?
2) Explain TV?
3) Explain cathode ray tube (CRT)?
4) Explain primary colours in TV?
5) With neatly explain Block diagram of color TV Receiver
SECTION C
1)Briefly explain Color perception.
2) Briefly explain CRT flyback power supply design and operation principles.
3) Explain Three Colour Theory.
UNITV
UNIT V ADVANCE TECHNIQUES
CCD camera – HDTV – Digital TV – Video Disc – Cable TV – Video Cassette Recorder.
SECTION A
1 DTV stands for_________
(1) Digitol television (2) Dital television (3) Digital television(4) Depth television
2 DVR stands for______________
(1) digitol video recorder (2) digital video recorder (3) dital video recorder (4) depth videorecorder
3 PVR stands for ___________
(1) percept video recorder (2) personal vide recorder (3) perso video recorder (4) personal video recorder
4 CCTV stands for________
(1) Crrocetcircuit television (2) Closed-circuit television (3)Clo-circuit television (4) Closed-colese television
5 CA TV stands for___________
(1) Cable TV (2) Coble TV (3) Capt TV (4) Cobal TV
6 HDTV stands for ________
(1) High defenition TV (2) Hog defenition TV (3) Heght defenition TV (4) Hall defenition TV
7 LCD stands for___________
(1) Liquid craystal display (2) Liquid crys display (3) Liquid crystal display (4) Long crystal display
8 LED stands for__________
(1) Light emitting diode (2) Long emitting diode (3) Low emitting diode (4) Light emotion diode
9 SDTV stands for____________
(1) stand-definition television (2) standard-definition television (3) standard-delete television (4) stondarddefinition television
10 DTV stands for__________
(1) Digital TV (2) Died TV (3) Dull TV (4) Difine TV
11 VCR Stands for______________
(1) Video Correct Recorder (2) Video Cassette Recorder (3)Video Cassette Reduce (4) none of these
12 NTSC Stands for_________________
(1) Nice Television System Committee, (2) National Television System Contact (3) National Television
System Committee,(4) Nutral Television Systematic Committee,
13 PAL Stands for____________
(1) Pulse Alternating Line (2) Phase Alternating Line (3) Phase Arrange Line (4) none of these
14 CCD Stands for_______________
(1) charge-contact device (2) change-coupled device (3)charge-coupled device (4) none of these
15 CCDs move charge between capacitive pins in the device, with the shift allowing for the transfer of
_________ between pins.
(1) change (2) charge (3) voltage (4) none of these
16 The CCD is a major piece of technology in ____________imaging.
(1) pure (2) analog (3) digital (4) urrent
17 In a CCD for capturing images, there is a photoactive region (an epitaxial layer of silicon), and a
transmission region made out of a ___________register.
(1) shift (2) large (3) small (4) none of these
18 The photoactive region of a CCD is, generally, an epitaxial layer of _________.
(1) oxide (2) aluminium (3) silicon (4) none of these
19 In CCD,Each square of four pixels has one filtered red, one blue, and __________green.
(1) 4 (2) 3 (3) 2 (4) 1
20 EMCCD stands for___________
(1) elective-multiplying CCD (2) electron-multiplying CCD (3)electron-managing CCD (4) none of these
21 The videocassette recorder, VCR, or video recorder is an electromechanical device that records analog
audio and analog video from broadcast ____________.
(1) HDTV only (2) current (3) television (4) none of these
22 Most domestic VCRs are equipped with a television broadcast receiver (tuner) for _____________
reception.
(1) current (2) TV (3) scanning (4) voltage
23 Digital television (DTV) is the transmission of audio and video by ____________ processed and
multiplexed signal.
(1) digitally (2) analog (3) voltage (4) none of these
24 DVB Stands for______________
(1) Digital Verswattile Broadcasting (2) Digital Video Broadcasting (3) Digital Video Black (4) none of these
25 DMB Stands for____________
(1) Digital Multimedia Brown (2) Digital Manage Broadcasting (3)Digital Multimedia Broadcasting (4) Dental
Multimedia Broadcasting
SECTION - B
1) Explain HDTV.
2) Explain digital video recorder (DVR).
3) Explain CCTV.
4) Define Cable television.
5) Explain Digital TV.
.SECTION - C
1) Briefly explain HDTV.
2) Briefly explain function of Digital television.
3) Explain about Protection parameters for terrestrial DTV broadcasting.
ALL THE BEST