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Audio Video Engineering MCQs set -4
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Audio Video Engineering MCQs set -4
1
Which of the following microphone have an integrated circuit (IC) that replaces the JFET in a conventional in an electret condenser microphone resulting in a fully digital output of the electret microphone?
A
Ribbon
B
Fiber optical
C
Shot-gun type
D
Digital interface
2
Which of the following is also called reverse transducer?
A
Loudspeaker
B
Microphone
C
Baffle
D
Compact disk
3
What is expressed as the ratio of output sound power to the input audio (electrical power) in loudspeaker?
A
Efficiency
B
Frequency response
C
Noise
D
Distortion
4
What is expressed as the ratio of ‘signal output’ to the ‘output in the absence of signal’?
A
Distortion
B
Signal to noise ratio (S/N)
C
Directivity
D
Impedance
5
What is the unit for directivity in loudspeaker?
A
Hz
B
KHz
C
Decibel
D
Newton
6
On which principle is the moving-coil loudspeaker based?
A
Electromagnetic transduction
B
Electromagnetic induction
C
Piezoelectric effect
D
Electro dynamic induction
7
What is the equation for the force in newton on the coil due to interaction between current through the coil and magnitude field?
A
F = Bli sin α
B
F = Bli tan α
C
F = Bli cos α
D
F = Bl sin α
8
Which magnetic material is the magnet in the moving coil loudspeaker made up of?
A
AlNiCo
B
BrNiCo
C
XeNiCo
D
PNiCo
9
What is attached to the coil of moving coil loudspeaker and it causes compression and rarefaction cycles in air?
A
Paper cone
B
Electrodynamic
C
Horn
D
Ribbon
10
What is the power handling capacity for cone type speaker?
A
Up to 25 watts
B
Up to 250 watts
C
Up to 235 watts
D
Up to 75 watts
11
Which is the ideal medium for editing like cut, copy and paste in disk based recording?
A
Blu-ray
B
Variable method
C
Audio compression
D
Magnetic disk drive
12
What type of coding is used for weakness of human ears in audio compression?
A
Static
B
Dynamic
C
Perpetual
D
Disk based
13
In which type of applications can hard disk based drives are useful?
A
Electronic news gathering
B
Timing errors
C
Low cost
D
High data stream
14
Which audio storage device is faster in retrieving audio in disk based recording?
A
USB flash drive
B
Magnetic tape
C
Solid state drive
D
Blu-ray disk
15
What is known as each digit in binary?
A
Bit
B
Byte
C
ADC
D
Mega
16
Which information is compared with the threshold level in a binary system?
A
Digital
B
Video
C
Audio
D
Binary
17
What is the main advantage of binary signal?
A
We can store large data
B
We can store less data
C
We cannot store data
D
High gain
18
A combination of how many bits in a binary number is commonly called a word?
A
32
B
64
C
16
D
8
19
Which bit is used for signed numbers in binary signal?
A
MSB
B
LSB
C
PCM
D
ACD
20
What is equal to 1024 bytes?
A
10K
B
3K
C
5K
D
1K
21
In which audio systems, the sound is first converted into analog electrical signals using a microphone as a transducer?
A
Digital
B
Analog
C
Binary
D
Passive
22
What numbers is digital information made of?
A
Discrete
B
Continuous
C
Binary
D
Prime
23
What type of errors can be eliminated for stereo images in digital systems?
A
Gross
B
Limiting
C
Timing
D
Random
24
Which of the following restrictions apply to analog broadcasting?
A
Disc based recording
B
Channel coding
C
Networks
D
Interference, fading and multipath reception
25
Over how much distance can we transmit digital audio without loss of quality?
A
Zero
B
Infinite
C
1
D
Thousands
26
Which is the important part of the system which are being used to time shift broadcast programs to skip commercial breaks?
A
Hard drive based servers
B
Software drive based servers
C
Disk based recording
D
Digital audio broadcasting
27
Which type of audio video files can be made portable by downloading?
A
Uncompressed
B
Compressed
C
Noisy
D
Distorted
28
Which of the following cannot be detected and therefore it is difficult to separate the original signal from distorted signal in audio signal?
A
Bandwidth
B
Amplitude
C
Distortion
D
Wavelength
29
What is the full form of PCM?
A
Pulse code modulation
B
Phase code modulation
C
Pulse carrier motion
D
Pulse carrier modulation
30
In which manner each sample is represented in audio signal?
A
Back porch
B
AGC (Automatic gain control)
C
Root mean square
D
Stepwise
31
What is expressed as the magnitude of sample represented by finite number which is proportional to some voltage in audio signal?
A
Quantizing
B
Amplitude
C
Phase
D
Frequency
32
At which time step is a sample taken in ADC?
A
Odd
B
Even
C
Prime
D
1
33
What is the other name for black and white TV?
A
Monochrome TV
B
Color TV
C
QLED
D
Plasma
34
Which generator produces sets of pulses to operate the system at appropriate timings?
A
Induction
B
Signal
C
Synchronizing
D
Electrical
35
Which carrier frequency is used in audio modulation in an FM transmitter for the purpose of audio signal transmission?
A
10.5 MHz
B
5.5 MHz
C
7.5 MHz
D
2.4 MHz
36
Which antenna is preferred for aerial TV receiver in monochrome TV receiver?
A
Loop
B
Dipole
C
Yagi-Uda
D
Helix
37
Which power supply is used in the monochrome TV receiver?
A
Linear
B
Switched
C
SMPS
D
Battery based
38
Which three colors are used in color TV transmitter?
A
Red, green, blue
B
Orange, blue, green
C
Black, green, purple
D
Red, yellow, pink
39
What is the full form of VSB?
A
Vestigial synchronous band
B
Vestigial side band
C
Vertical side band
D
Vestigial synchronous base
40
How many times more pixels do an HDTV have than the resolution of analog signal in a DTV?
A
6
B
2
C
10
D
4
41
Which digital signal processing technique takes preventive measures to protect the transport streams from errors caused by noise and interference in the transmission channel in DTV transmitter and receiver?
A
FEC (Forward Error Correction)
B
AGC (Automatic Gain Control)
C
VDU (Visual Display Unit)
D
RFID (Radio Frequency Identification)
42
What is the other name for video monitor?
A
SSD
B
CCU
C
VSU
D
VDU
43
Which sync signals ensure that the scanning action of the electron beam down and across the screen is in synchronization in video monitors?
A
Horizontal
B
Left and right
C
Vertical
D
Horizontal and vertical
44
What is termed as the process of exploring a video picture image in quick succession?
A
Picture frame
B
Skimming
C
Flicker
D
Scanning
45
Which signals are applied to the horizontal and vertical deflection circuits of the camera tube in scanning?
A
Analog
B
Unit impulse
C
Sawtooth
D
Ramp
46
What is the word used by TV engineers for one complete scanning from left to right and top to bottom and then again to the top?
A
Picture frame
B
Picture image
C
Picture video
D
Picture audio
47
How many scanning lines per frame are there for Indian PAL system?
A
255
B
365
C
760
D
625
48
What happens to the image if the space between pictures is longer than the period of persistence of vision?
A
Skimming
B
Flickers
C
Scanning
D
Interlaced scanning
49
What is the field rate for PAL system?
A
15 Hz
B
75 Hz
C
2 Hz
D
50 Hz
50
What is the term for even and odd fields that are scanned alternately?
A
Interlaced scanning
B
Skimming
C
Scanning
D
Flicker
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