aInfoEra
Home
MCQs
Electrical engineering — Quiz
Audio Video Engineering MCQs set -3
50 questions · Test your knowledge
Home
/
MCQs
/
Audio Video Engineering MCQs set -3
1
What is termed as a transducer that converts acoustic sound pressure variation into the electrical signal of same amplitude, frequency and in the same proportion as pressure variations?
A
Microphone
B
Sensitivity
C
Distortion
D
Directivity
2
What is defined as the electrical signal in audible range (20 Hz to 20 KHz) in a microphone?
A
Video signal
B
Audio signal
C
Transmission signal
D
Mixed signal
3
What is termed as the ratio of output of microphone in the presence of sound to output of microphone in the absence of sound with logarithmic base of 20?
A
Frequency response
B
Distortion
C
Directivity
D
Signal-to-noise ratio
4
What is related to uneven response to audio signals in microphone?
A
Distortion
B
Directivity
C
Frequency response
D
Signal-to-noise ratio
5
What should be the distortion to maintain the quality of microphone and Hi-Fi systems?
A
Less than 5%, less than 1%
B
Less than 10%, less than 77%
C
Less than 100%, less than 45%
D
Less than 1000%, less than 97%
6
What is the percent of lobe present in rear of supercardioid microphone?
A
25, 75
B
37, 63
C
20, 89
D
67, 99
7
What is the percent of broader lobe present in rear of hypercardioid microphone?
A
67, 99
B
20, 89
C
37, 63
D
25, 75
8
Which is the correct expression for the output impedance of microphone?
A
Ω
B
λ
C
θ
D
v
9
What is defined as the speaker which covers low audio frequencies?
A
Woofer
B
Squawker
C
Tweeter
D
Crossover network
10
What is defined as the speaker which covers high audio frequencies?
A
Tweeter
B
Squawker
C
Woofer
D
Crossover network
11
What is defined as the speaker which covers mid audio frequencies?
A
Woofer
B
Tweeter
C
Crossover network
D
Squawker
12
What is called the combination of low-pass and high-pass filter?
A
Band-pass filter
B
Passive filter
C
All-pass filter
D
Band-stop filter
13
Which of the following system have a reserve power handling capacity?
A
Microphones
B
Loudspeakers
C
Multi-way speakers
D
Blue ray
14
Which control is required in multi-way speaker system that may be balanced one against the other to give the particular feeling of concert hall?
A
Volume
B
Video
C
Pitch
D
Frequency
15
Which of the following loudspeaker is used to achieve the high power output of more than 25 watts?
A
Horn type
B
Electrodynamic
C
Cone type
D
Carbon
16
Which type of transformer does horn act in the horn type loudspeaker?
A
Acoustic
B
Grounding
C
Phase-shifting
D
Power
17
What is the efficiency of a horn type loudspeaker?
A
5 to 10%
B
75 to 100%
C
5 to 7%
D
30 to 50%
18
What is the distortion in horn type speaker?
A
50%
B
15%
C
25%
D
Less than 5%
19
What is the SNR (Signal to Noise Ratio) of the horn type microphone?
A
40 dB to 60 dB
B
4 dB to 6 dB
C
70 dB to 100 dB
D
40 dB to 80 dB
20
What is the range of a very low impedance microphone?
A
0 to 50 Ω
B
50 to 100 Ω
C
1000 to 1500 Ω
D
100 to 600 Ω
21
What is the range of a high impedance microphone?
A
50 to 100 Ω
B
100 to 600 Ω
C
750 Ω and above
D
500 to 550 Ω
22
On which principle is the working of moving coil microphone based?
A
High impedance
B
Low impedance
C
Electromagnetic Induction
D
Medium impedance
23
What type of permanent magnet is used with Central pole piece and peripheral pole piece in moving coil microphone?
A
Pot
B
Ribbon
C
Cardioid
D
Crystal
24
In which type of microphone we can speak from a distance of half meter or 25cm?
A
Ribbon
B
Cardioid
C
Crystal
D
Moving coil / dynamic
25
Which of the following microphone is also called pressure gradient and velocity microphone?
A
Cardioid
B
Electret
C
Moving coil
D
Ribbon
26
Which of the following microphone is mostly used in dramas and concerts?
A
Electret
B
Capacitor
C
Ribbon
D
Moving coil
27
Which of the following microphone have the directivity pattern shaped like a heart?
A
Ribbon
B
Cardioid
C
Moving coil
D
Capacitor
28
Which of the following microphone is costlier than other microphones?
A
Moving coil
B
Ribbon
C
Carbon
D
Cardioid
29
On which principle is the working of crystal microphone based?
A
High impedance
B
Medium impedance
C
Piezoelectric effect
D
Electromagnetic Induction
30
On which microphone ceramic can work on high temperature upto 100 degree Celsius?
A
Ribbon
B
Crystal
C
Moving coil / dynamic
D
Carbon
31
In which form the mechanical force on the crystal is developed in both directions when there is pressure of sound waves?
A
Compressions and rarefactions
B
Compressions
C
Rarefactions
D
Neither compressions nor rarefactions
32
Which type of microphone is used for mobile communications?
A
Crystal
B
Capacitor
C
Carbon
D
Electret
33
What is the capacitor equation for the capacitance microphone?
A
C = kA / d
B
C = kA + d
C
C = kA – d
D
C = kA * d
34
What is the output impedance of capacitor microphone?
A
25 Ω
B
0.25 Ω
C
1 Ω
D
100 MΩ
35
Which type of microphone is used in sound level meter?
A
Electret
B
Capacitor
C
Crystal
D
Carbon
36
Which of the following microphone is coated with thin layer of Teflon at the back plate?
A
Electret
B
Capacitor
C
Carbon
D
Crystal
37
Which of the following is used as tie-clip microphone?
A
Cardioid
B
Carbon
C
Capacitor
D
Electret
38
What happens to the resistance of carbon microphone when carbon granules are pressed and the current through the circuit increases?
A
Increases
B
Decreases
C
Constant
D
Increases and decreases
39
What is the equation for the instantaneous current through load resistor in carbon microphone?
A
I = E / R + δr
B
J = E / r + δr
C
J = E / R + δr
D
I = D / R + δr
40
Which of the following microphone has the lowest cost in compare to other microphones?
A
Cardioid
B
Capacitor
C
Electret
D
Carbon
41
Which of the following microphones is used only in telephones?
A
Moving coil
B
Ribbon
C
Carbon
D
Electret
42
What is the distortion in carbon microphone?
A
5%
B
1%
C
500%
D
10%
43
Which of the following microphone is used for lecture delivery in the class/hall?
A
Lavalier
B
Noise cancelling
C
Shot-gun type
D
Fiber optical
44
Which of the following microphone is an electret type small microphone?
A
Fiber optical
B
Shot-gun type
C
Noise cancelling
D
Tie-clip
45
Which type of microphone is used in sports for oath taking ceremony?
A
Shot-gun type
B
Noise cancelling
C
Fiber optical
D
Radio (wireless)
46
In which of the following microphone two matching transducing elements are used?
A
Radio (wireless)
B
Fiber optical
C
Noise cancelling
D
Shot-gun type
47
Which microphone is mounted on a long pole and operated by an audio crew member or assistant?
A
Shot-gun type
B
Fiber optical
C
Digital interface
D
Lavalier
48
On which microphone monitoring on headphone is very much important?
A
Lavalier
B
Digital interface
C
Shot-gun type
D
Fiber optical
49
Which microphone provides interference free communication in electrically noisy channel?
A
Fiber optical
B
Shot-gun type
C
Lavalier
D
Digital interface
50
Which of the following microphones is used in highly explosive areas and nuclear plants?
A
Digital interface
B
Shot-gun type
C
Fiber optical
D
Ribbon
Submit Quiz
Back to All Quizzes