Consumer Electronics(CEL)

Multiple Choice Questions

1   Microphone is a transducer which converts
    (A)   Electrical Energy into Sound energy
    (B)   Sound Energy into electrical Energy
    (C)   Pressure into sound Energy
    (D)   Sound energy into mechanical Energy
[showhide type=”button7c1″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
2   Which of the following is not part of Public Address (PA) system
    (A)   Microphone
    (B)   Loud Speaker
    (C)   Amplifier
    (D)   Sound Synthesizer
[showhide type=”button7c2″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
3   Which of the following speaker reproduces high frequency signal
    (A)   Woofer
    (B)   Tweeter
    (C)   Squawker
    (D)   Horn type
[showhide type=”button7c3″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
4   In stereophonic sound system there are
    (A)   Only one amplifier
    (B)   At least two amplifiers
    (C)   Doesn’t need amplifier
    (D)   None of the above
[showhide type=”button7c4″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
5   Which of the following is the important unit of Hi-Fi Stereo system
    (A)   Equalizer
    (B)   Amplifier
    (C)   Pre-Amplifier
    (D)   All the above
[showhide type=”button7c5″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
6   Range of Audio frequency is
    (A)   20Hz to 20KHz
    (B)   20Hz to 20MHz
    (C)   300Hz to 3.5KHz
    (D)   20Hz to 2KHz
[showhide type=”button7c6″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
7   Fidelity of audio system is
    (A)   Faithful reproduction of Audio Frequency
    (B)   Faithful reproduction of Noise
    (C)   Faithful reproduction of High frequency signal only
    (D)   Faithful reproduction of Low frequency signal only
[showhide type=”button7c7″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
8   Long form of DVD is
    (A)   Digital variable Disc
    (B)   Digital Versatile Disc
    (C)   Data Versatility Disc
    (D)   Digital Volatile Disc
[showhide type=”button7c8″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
9   What are the different motors used in CD player
    (A)   Spindle Motor
    (B)   Tray Motor
    (C)   Feed Motor
    (D)   All the above
[showhide type=”button7c9″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
10   In order to read data from CD surface which of the following is used
    (A)   LASER diode Assembly
    (B)   D to A Converter
    (C)   Digital Filter
    (D)   A to D Converter
[showhide type=”button7c10″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
11   Which of the following lens is not used in CD pick up assembly
    (A)   Objective lens
    (B)   Collimation lens
    (C)   Concave lens
    (D)   Convex lens
[showhide type=”button7c11″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
12   Role of Cross over network in Audio system is
    (A)   Divide Radio signal into multiple frequency band
    (B)   Divide audio signal into multiple frequency band
    (C)   Separate carrier signal from modulated signal
    (D)   Enhance the strength of High frequency signal
[showhide type=”button7c12″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
13   Dolby Noise Reduction system
    (A)   Decreases Signal/Noise (S/N) ratio
    (B)   Doesn’t affect Signal/Noise (S/N) ratio
    (C)   Increases Signal power
    (D)   Increases Signal/ Noise (S/N) ratio
[showhide type=”button7c13″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
14   Standard Compact Disc (CD) has diameter of
    (A)   120 mm
    (B)   140 mm
    (C)   220mm
    (D)   210 mm
[showhide type=”button7c14″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
15   Meaning of FF key on Remote control of CD player is
    (A)   Find File
    (B)   First File
    (C)   Fast Forward
    (D)   Front Face
[showhide type=”button7c15″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
16   Long form of CD is
    (A)   Compact Disc
    (B)   Complex Disc
    (C)   Complementary Disc
    (D)   Classic Disc
[showhide type=”button7c16″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
17   Important Component of Hi-Fi system is
    (A)   Equalizer
    (B)   Matching Network
    (C)   Amplifier
    (D)   All the Above
[showhide type=”button7c17″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
18   Loud speaker converts
    (A)   Electrical signal into Sound
    (B)   Sound into Electrical signal
    (C)   Electronic signal into mechanical signal
    (D)   None of the above
[showhide type=”button7c18″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
19   Range of voice frequency is
    (A)   3Hz to 3.5 kHz
    (B)   300Hz to 3.5 kHz
    (C)   20 Hz to 20 kHz
    (D)   10 Hz to 10 kHz
[showhide type=”button7c19″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
20   Fidelity of Audio system is
    (A)   Degree of Faithfulness
    (B)   Noise in audio signal
    (C)   Quality of signal
    (D)   Input of audio system
[showhide type=”button7c20″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
21   Photo diode array in CD player assembly does
    (A)   Conversion of light into electrical signal
    (B)   Conversion electric signal into light
    (C)   Conversion of photovoltaic signal into sound signal
    (D)   Conversion of normal light into ultraviolet light
[showhide type=”button7c21″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
22   In Hi-Fi audio system, S/N ratio is
    (A)   Very High
    (B)   Very Low
    (C)   Moderate
    (D)   Zero
[showhide type=”button7c22″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
23   Preamplifier converts
    (A)   Weak signal into considerably strong signal
    (B)   Strong signal into weak signal
    (C)   Amplifies selected frequency
    (D)   Rejects selected frequency
[showhide type=”button7c23″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
24   Long form of Hi-Fi in Hi-Fi audio system is
    (A)   High Fidelity
    (B)   Highest Field
    (C)   High Frequency
    (D)   Higher Field
[showhide type=”button7c24″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
25   Function of Tweeter loud speaker is to play
    (A)   High Frequency
    (B)   Low frequency
    (C)   Mid Frequency
    (D)   All frequency
[showhide type=”button7c25″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
26   CCD converts light signal into
    (A)   Electric current
    (B)   Electric charge
    (C)   Electric voltage
    (D)   Frequency
[showhide type=”button7c26″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
27   Dolby Noise Reduction system
    (A)   Decreases Signal/Noise (S/N) ratio
    (B)   Doesn’t affect Signal/Noise (S/N) ratio
    (C)   Increases Signal power
    (D)   Increases Signal/ Noise (S/N) ratio
[showhide type=”button7c27″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
28   Standard Compact Disc (CD) has diameter of
    (A)   120 mm
    (B)   140 mm
    (C)   220mm
    (D)   210 mm
[showhide type=”button7c28″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
29   Aspect ratio for conventional Television (TV) system
    (A)   3:04
    (B)   4:06
    (C)   4:03
    (D)   5:03
[showhide type=”button7c29″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
30   Which of the following is not a scanning technique
    (A)   Sequential Scanning
    (B)   Interlaced Scanning
    (C)   Sectional Scanning
    (D)   None of the above
[showhide type=”button7c30″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
31   Number of scanning lines in conventional Television system is
    (A)   625
    (B)   615
    (C)   665
    (D)   645
[showhide type=”button8c1″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
32   What are the primary colors in color Television
    (A)   Red. Violet, Yellow
    (B)   Red, Green, Blue
    (C)   Red, Purple, Magenta
    (D)   Red, White, Black
[showhide type=”button8c2″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
33   What are the Secondary colors in Color Television
    (A)   Red, Green, Blue
    (B)   Red. Violet, Yellow
    (C)   Red, White, Black
    (D)   Yellow, Magenta, Cyan
[showhide type=”button8c3″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
34   Modulation Technique used for Transmission of video signal in Television
    (A)   Vestigial Side Band Modulation
    (B)   Single Side Band Modulation
    (C)   Double Side Band Modulation
    (D)   Single Side band Suppressed Carrier
[showhide type=”button8c4″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
35   Long form of CCD is
    (A)   Charge Carrier Density
    (B)   Charged Coupled Device
    (C)   Charge Collecting Device
    (D)   Cathode Coupled Device
[showhide type=”button8c5″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
36   Role of multiplexer in Television is
    (A)   Selection of Desired channel frequency
    (B)   For connecting Television with satellite
    (C)   For Connecting Antenna Cable with Television
    (D)   None of the above
[showhide type=”button8c6″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
37   Transmission standard used in HDTV is
    (A)   MUSE system
    (B)   PAL system
    (C)   NTSC system
    (D)   SECAM system
[showhide type=”button8c7″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
38   The main function of electron gun in a cathode-ray tube is to —- electrons.
    (A)   Deflect
    (B)   Produce
    (C)   Size
    (D)   Aspect
[showhide type=”button8c8″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
39   In a CRT, focusing of electron beam is achieved by varying
    (A)   Grid bias
    (B)   Heater voltage
    (C)   Voltage of first accelerating anode
    (D)   Secondary accelerating voltage
[showhide type=”button8c9″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
40   Microwave oven should not be used for cooking
    (A)   Nonfood items
    (B)   Tea
    (C)   Coffee
    (D)   Food items
[showhide type=”button8c10″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
41   Types of washing machines are
    (A)   Semi-automatic
    (B)   Fully Automatic
    (C)   Top load or front load
    (D)   All the above
[showhide type=”button8c11″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
42   The number of frames per second in our TV system is
    (A)   50
    (B)   24
    (C)   25
    (D)   49
[showhide type=”button8c12″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
43   The best viewing distance for a TV picture is ____ times the picture height
    (A)   2 to 4.
    (B)   4 to 8
    (C)   8 to 10
    (D)   10 to12
[showhide type=”button8c13″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
44   Camcorder is used to record
    (A)   Audio signal
    (B)   Video signal
    (C)   Both Audio and video signal
    (D)   None of the above
[showhide type=”button8c14″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]

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