| Post Name | Assistant Recordist - Kerala State Film Development corporation Limited |
|---|---|
| Question Paper Code | 076/2024 |
| Category Code | 251/2023, 436/2023 |
| Date of Test | 27 June 2024 |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Source A emits sound of frequency 510 Hz. It is heard by B, who is a distance of 200 m. Take the speed of sound to be 340 m s⁻¹. How many wavelengths fit in this distance? What is the wavelength?
Answer
D. 300; 2/3 m
2
The Victoria memorial at Kolkatta is famous for the whispering gallery effect. This
phenomenon occurs due to :
Answer
A. Reflection
3
In tuning a keyboard instrument we must decide :
(i) The pitch level to be set
(ii) Temperament
Answer
B. Both (i) and (ii)
4
The sound intensity level of threshold of pain at 1 kHz is 120 dB. What is its tone intensity?
Answer
C. 1 Wm–2
5
Match the following :
(1) Sound absorption – (i) Mach
(2) Loudness level – (ii) Sone
(3) Subjective loudness – (iii) Sabin
(4) Supersonic – (iv) Phon
Answer
B. (1)-(iii), (2)-(iv), (3)-(ii), (4)-(i)
6
A set of statements are given. Choose the best classification:
(i) Reverberation time is the time required for the intensity of a sound to drop to 1 part of
100000 of its original intensity
(ii) The size and shape of the room influence the sound in an auditorium
(iii) To achieve a good focus the reflector must have circular shape.
(iv) Clarity refers to the amount of reflected sound intensity relative to the intensity of the
direct sound.
(v) To hear a distinct echo the time interval between the original sound and the reflected
one must be at least 0.1s.
Answer
D. (i)- False, (ii)- True, (iii)- False, (iv)- False, (v)-True
7
The maximum frequency of sound waves :
Answer
Question Cancelled
8
Choose the best option for the sound wave in a stretched wire :
(i) The period is proportional to the square of the length of the wire
(ii) It requires 4 times as much tension to raise the frequency to twice its original value.
(iii) The frequency will double if the linear density becomes 2 times greater.
(iv) The period is proportional to the diameter of the wire
Answer
B. Both (ii) and (iv) are correct
9
Which among the following is not associated with the acoustic suspension speaker?
(i) Relatively inefficient to convert electrical energy to sound energy
(ii) Relatively rapid falloff in output level at frequencies below about
60 to 100 Hz
(iii) Simple and smaller enclosure
(iv) Interference of the waves from the front and rear of the speaker occurs.
Answer
C. (iv)
10
Which among the following is the frequency-domain representation of a triangle wave?
Answer
B. a_n = 4A/(nπ)²
11
Which of the statements regarding Pressure Gradient microphone are correct?
Statement 1 : This type of microphones are omni directional
Statement 2 : Only one side of microphone is exposed to Sound
Answer
D. Neither (1) nor (2)
12
Ribbon microphones are :
Answer
A. Bi-directional
13
Among the following microphones the one which is least common is :
Answer
C. Ceramic Microphone
14
Two primary types of dynamic transducers used in microphones are :
Answer
A. Moving Coil and Moving Conductor
15
Which of the given statements are most correct with respect to Pressure Gradient
Microphone converts?
Answer
C. Air pressure difference of two sides of diaphragm is converted to electrical signals
16
Microphone converts :
Answer
B. Sound pressure variation to electrical signals
17
Binaural microphones make use of :
Answer
A. Two microphones for recording
18
Condenser microphones :
Answer
A. Require external power sources
19
Condenser microphones are also called :
(1) Capacitor microphone
(2) Dynamic microphone
(3) Static microphone
(4) Dual microphone
Answer
B. Both (1) and (3)
20
Which among the following are type of electret microphone?
(1) Dc-biased microphone
(2) RF Microphone
(3) HF Microphone
(4) LF Microphone
Answer
A. Only (1)
21
Wired Lavaliere Microphones are called :
Answer
A. Lapel Microphone
22
The classed of Power amplifiers :
(1) Class A
(2) Class B
(3) Class C
(4) Class AB
Answer
A. All the above
23
What is the ideal response of headphone?
Answer
B. 20 Hz to 20 kHz
24
Signal to Noise ratio of amplifier is supposed to be :
Answer
B. High
25
Which of the following with respect to loudspeakers are correct?
Answer
D. Bass corresponds to low-frequency and treble corresponds to high-frequency
26
Headphone converts :
Answer
A. Electrical signal to sound pressure variation
27
The type of microphone used for Lecture delivery is :
Answer
B. Lapel Microphone
28
Which of the microphones are usually used in television interviews and operated by crew?
Answer
A. Shotgun
29
Howling is produced in Speakers due to :
(1) Audio feedback from Speakers to microphone
(2) Peaking of audio signals at certain frequencies
(3) Sinusoidal signals present at input
(4) Unwanted input noise
Answer
D. (1) and (2)
30
Loudspeakers are positioned ideally at :
Answer
C. Positions depending on the possible echos
31
Preamplifiers are :
Answer
A. Used before power amplifier stage
32
Ohms law states that :
Answer
C. V = IR
33
The theorem that is used for impedance matching is :
Answer
B. Maximum power transfer theorem
34
As the noise increase the Signal to Noise Ratio (SNR) :
Answer
C. Decreases
35
Microphones are usually kept away from speakers while operating :
Answer
D. To reduce signal from Speaker enter the microphone
36
To generate video game footage the optimum frame rate could be :
Answer
D. 60 fps
37
Slow motion videos require a frame rate of :
Answer
D. 60 fps
38
Digital tools that are not used for audio post-production are :
Answer
A. Audible
39
In DCP
Answer
B. JPEG 2000
40
In DCP, compression is accomplish using the technology :
Answer
A. Wavelet
41
In stereoscopic (3D films) the frame size used is :
Answer
C. 48 fps
42
In DCP, audio and video are encrypted using :
Answer
A. AES
43
A Nagra Analogue sound recorder uses 24 bit PCM with 96 KHz sampling rate. The bit rate
of the system is :
Answer
C. 2.3 Mbps
44
The audio encryption standard used in classical films is :
Answer
D. PCM
45
The digital interface used in classical audio workflow is :
Answer
D. SPDIF
46
Example of flatbed editor is :
Answer
A. Steenbeck
47
Steenbeck uses AI powered analysis systems for :
Answer
B. Generating high resolution video
48
PAL stands for :
Answer
C. Phase Alternating Line
49
SECAM uses :
Answer
C. 25 fps
50
NTSC uses :
Answer
B. 30 fps
51
In Telecine, 2:3 pull down is used :
Answer
B. Increase the frame rate from 25 fps to 30 fps
52
In the following the television broadcasting system is :
Answer
Question Cancelled
53
PAL plus incorporates :
Answer
B. Hidden signalling
54
ATSC standards are standards for :
Answer
C. Broadcasting
55
The symbols used for broadcasting are :
Answer
A. From A-N
56
Which of the following functions does the PAD switch perform on a typical audio mixer?
Answer
B. Attenuate the audio signal level by 20 dB
57
Which of the following connectors on an audio mixer has to be necessarily balanced?
Answer
A. Mic input
58
The electrical parameter that corresponds to the audio signal level displayed in the meter of
an audio mixer or recorder is :
Answer
D. Voltage
59
If the manual of an audio mixer specifies it as a powered mixer, what does it imply?
Answer
B. The mixer has a built-in audio amplifier
60
With what aspect of an audio mixer is the term VCA associated :
Answer
D. Fader automation
61
If the audio level meter of a mixer is calibrated in dBu, what is the implied standard
reference level?
Answer
A. 0.775 Volts
62
Which of the following statements is not true with respect to a VU meter?
Answer
C. VU meters have a fast rise time and a slow fall time
63
Pick the odd one out from among the following :
Answer
D. Equalizers
64
Which of the following parameters of an audio signal is not affected when it passes through
an equalizer?
Answer
C. Dynamic range
65
The audio level meter on a digital audio mixer is calibrated in :
Answer
B. dBFS
66
The digital audio interface that is commonly seen on a digital audio mixer and used for
transferring digital audio signals to and from consumer systems is :
Answer
C. S/PDIF
67
The standard impedance of the mic input of an audio console is :
Answer
Question Cancelled
68
If the compression ratio of a compressor is set at 5 : 1 and the threshold is set at 50 dB. What
does it imply?
Answer
C. For every 5 dB increase in signal level beyond 50 dB, there will be an increase of only 1 dB
69
The reference clock signal that is used for ensuring synchronization between the electronic
components of interconnected digital audio devices is :
Answer
B. Word clock
70
What is the main requirement for a digital audio mixer to function as a control surface of a
DAW?
Answer
B. A communication protocol for communicating with the DAW
71
The first medium on which an analogue recording was made is :
Answer
B. Cylindrical disk
72
Which of the following is not true with regard to analogue recording?
Answer
A. An analogue signal is discontinuous in time
73
Pick out the true statement from among the following :
Answer
B. A bias frequency is a necessity as far as analogue recording goes
74
The mathematical relationship between the RMS and peak values of a sine wave is :
Answer
A. RMS = 0.707 × Peak
75
Which of the following terms denotes the alignment of the magnetic head of an analogue tape
recorder with the edge of the tape?
Answer
C. Azimuth
76
Which of the following is true with regard to the magnetic head of an analogue tape recorder?
Answer
A. The smaller the width of the head gap, the better will be the high frequency
response
77
The pre-amplifier in the mic input circuit of any audio recorder or mixer amplifies the weak
mic signal to a level of :
Answer
C. 1 volt
78
Which of the following statements is /are TRUE?
(1) An optical sound track recorded on sound film is inferior in terms of frequency
response, to a recording done on magnetic tape
(2) The high frequency response of an optical film recording is poor, compared to that of a
magnetic tape recording
(3) A magnetic tape recording needs to be processed in a lab if it is to be played back
Answer
A. (1) and (2) only
79
If an analogue signal is sampled at 48000 Hz (48 KHz) and quantized to 16 bits per sample,
the amount of storage space that is required for storing one second of a stereo file is :
Answer
B. 2 × [48 KHz × 16 bits]
80
Which of the following aspects of a digital recording has a bearing on its’ dynamic range?
Answer
C. Quantization size
81
Which of the following phenomenon makes it possible to listen to audio continuously from a
hard disk based recording system?
Answer
B. Buffering
82
Name the component that is at the heart of real time signal processing in a digital audio
workstation
Answer
C. DSP
83
As per the Nyquist theorem, what should be the minimum sampling frequency when an
analogue signal that is subjected to sampling as part of the analogue to digital conversion?
Answer
B. 2 × the highest audio frequency to be sampled
84
How many bits are there in one frame of SMPTE timecode?
Answer
B. 80
85
What is the first process that takes place when an analogue audio signal is sampled?
Answer
A. Pulse Amplitude Modulation
86
What is the level at which the surround sound loudspeakers in a theatre are calibrated?
Answer
B. 82 dB SPL
87
Of the following surround sound formats, pick out the one that has all the channels matrix
encoded onto two optical tracks on 35 mm film :
Answer
Question Cancelled
88
If a viewer is seated at the sweet spot of a 5.1 surround sound theatre, what is the
approximate angle subtended at the left ear of the viewer by the left surround speaker?
Answer
Question Cancelled
89
In which of the following are the 5.1 surround sound tracks stored on a CD?
Answer
A. DTS
90
Why is the LFE channel of a 5.1 surround system denoted as a 0.1 channel?
Answer
C. Because it is designed only to handle one octave in the audible range
91
What is the frequency at which the X curve starts deviating from a flat characteristic?
Answer
D. 2 KHz
92
Which of the following is not true with regard to the loudspeakers in a 5.1 surround sound
theatre?
Answer
A. All the loudspeakers are full range speakers
93
The format which has a 7.1 surround track encoded digitally on both sides of a 35 mm film
is :
Answer
C. SDDS
94
Why aren’t all the loudspeakers in a 5.1 / 7.1 surround sound theatre calibrated at the same
level?
Answer
Question Cancelled
95
Which of the following films has been released in the surround sound format?
Answer
A. Oklahoma
96
Name the acoustic phenomenon which has a bearing on the way the human ear perceives the
direction of sound :
Answer
A. The Haas Effect
97
The visible part of the human ear is called :
Answer
B. Pinna
98
Which part of the human hearing system works as an ‘impedance matching’ device?
Answer
D. Middle ear
99
What is the name given to the set of equal loudness curves that denote the frequency
response of the human ear?
Answer
A. Fletcher-Munsor curves
100
Which part of the human ear converts the sound vibrations into nerve firings?
Answer
B. Inner ear
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