Electrical engineering-Audio Video Engineering MCQs set /1 Sample Test,Sample questions

Question:
 In which instruments Helmholtz resonators also important?

1.Stringed

2.Woodwind

3.Brass

4.Keyboard


Question:
As sound requires a medium, it cannot travel through which of the following?

1.Glass

2.Air

3.Vacuum

4.Water


Question:
At what sound pressure is the pain felt?

1.53 Pa

2.63 Pa

3.73 Pa

4.103 Pa


Question:
By which formula the resonant frequency is determined?

1.f = c/2π√B/VS Hz

2.f = c/5π√A/VL Hz

3.f = c/2π√A/VL Hz

4.f = c/3π√A/VS Hz


Question:
How do sound waves travel from the point of source?

1.Spherical waves

2.Oval waves

3.Sinewaves

4.Cos waves


Question:
How many bones does middle ear have?

1.1

2. 2

3. 3

4.4


Question:
How many set of frequencies comprise the spectrum?

1.1

2.2

3.3

4.4


Question:
How much phons is equal to 1 sone?

1.10

2.20

3.30

4.40


Question:
How much times greater is the threshold of pain corresponding to pressure amplitude of the atmospheric pressure?

1.10 million

2.1 billion

3.1 trillion

4.1 million


Question:
Two sounds have levels of 80 dB and 100 dB. What is the difference in sound intensities?

1.50

2.100

3.200

4.1000


Question:
What can be expressed as distance travelled in one second?

1.Phase

2.Velocity

3.Period

4.Wavelength


Question:
What can be termed as frequencies higher than the fundamental frequencies?

1.Overtones

2.Timbre

3.Pitch

4.Frequency


Question:
What can be termed as the intensity of compressions and rarefaction produced in the medium?

1.Frequency

2.Cycle

3.Wavelength

4.Amplitude


Question:
What can be termed as the sensation of a frequency?

1.Interval

2.Octaves

3.Harmonic

4.Pitch


Question:
What can occur when the speed of a wave changes, as it moves from one environment to another?

1.Reflection

2.Diffraction

3.Frequency

4.Refraction


Question:
What causes reverberation?

1.Diffraction

2.Frequency

3.Reflection

4. Refraction


Question:
What does the bones in the ear act like?

1.Audio amplifier

2.Video amplifier

3.Radio amplifier

4.Ultrasonic amplifier


Question:
What is called as the sound power per unit area?

1.Sound intensity

2.Sound pressure

3.Sound amplitude

4.Sound velocity


Question:
What is caused by bending across obstacles in sound waves?

1.Diffraction

2.Reflection

3.Frequency

4.Refraction


Question:
What is disturbed at the opening of Helmholtz resonator that bounces like a mass on a spring in simple harmonic motion which creates sound?

1.Air

2.Water

3.Sound

4. Frequency


Question:
What is termed as a pattern which repeats itself over time?

1.Wavelength

2.Frequency

3.Amplitude

4.Periodic Vibration


Question:
What is termed as one repetition of the pattern?

1.Velocity

2.Cycle

3.Frequency

4. Wavelength


Question:
What is termed as the amount of sound energy that is reflected off a surface?

1.Reflection

2.Refraction

3.Diffraction

4.Frequency


Question:
What is termed as time required to complete one cycle of vibration?

1.Amplitude

2. Wavelength

3.Period

4.Cycle


Question:
What is the dimension of sound waves in the real world?

1.One-dimensional

2.Two-dimensional

3.Three-dimensional

4.Four-dimensional


Question:
What is the effect called in which each single molecule only moves a small distance as it vibrates, and it causes the nearby molecules to vibrate all the way to the ear?

1.Spectral effect

2.Dynamic effect

3.Domino effect

4.Modulation effect


Question:
What is the full form of Hi – Fi?

1.Highest fidelity

2.High fidelity

3. Huge fidelity

4.High frequency


Question:
What is the full form of SPL?

1.Signal Pressure Level

2.Sound Pressure Level

3.Signal Phase Level

4. Sound Periodic Level


Question:
What is the interval between 400 Hz and 100 Hz?

1.4

2.16

3.40,000

4.128


Question:
What is the newer unit of loudness and is now the international standard?

1.Phon

2.Sone

3.Decibel

4.Frequency


Question:
What is the required frequency range for Hi-Fi programs?

1.80 Hz to 5 KHz

2.40 Hz to 15 KHz

3.60 Hz to 55 KHz

4.8 Hz to 66 KHz


Question:
What is the required frequency range for normal entertainment programs?

1.80 Hz to 5 KHz

2.40 Hz to 15 KHz

3.60 Hz to 55 KHz

4.8 Hz to 66 KHz


Question:
What is the sound motion curves called?

1.Frequency

2.Cycle

3.Overtone

4.Waveform


Question:
What is the standard pitch of a human ear?

1.220 Hz

2.600 Hz

3.20 Hz

4.440 Hz


Question:
What is the unit of loudness level for pure tone?

1.Decibel

2.Velocity

3.Phon

4.Wavelength


Question:
What is the velocity at 0° C?

1.331 m/s

2. 339 m/s

3. 351 m/s

4.431 m/s


Question:
What makes two musical instruments sound different when they are playing the same note?

1.Overtones

2.Timbre

3.Frequency

4.Pitch


Question:
Which age group of people can hear the frequencies above 20,000 Hz?

1.70-80 years

2.65-75 years

3.Young

4.55-65 years


Question:
Which audio frequencies have smaller wavelength and suffer less diffraction?

1.Low

2.High

3.Medium

4.Low and High


Question:
Which change is insensitive to a human ear?

1.Phase

2.Velocity

3.Timbre

4.Overtones


Question:
Which is one of the most common applications of Helmholtz resonator?

1.Woofer

2.Subwoofer

3.Reflection

4. Diffraction


Question:
Which of the following has all the characteristics of a wave like amplitude, frequency, wavelength, phase and velocity?

1.Sound

2.Intensity

3.Air

4.Energy


Question:
Which of the following is the fluid-filled tube present in the inner ear?

1.Cochlea

2.Pinna

3.Auditory nerve

4.Fallopian


Question:
Which of the following sounds are considered harmonic?

1.Thunder and splattering of rain

2.Flute and trumpet

3.Thunder and trumpet

4.Thunder and saxophone


Question:
Which of the following sounds are considered inharmonic?

1.Thunder and splattering of rain

2.Thunder and trumpet

3.Saxophone and trumpet

4.Trumpet and flute


Question:
Which resonant frequencies can be obtained with Helmholtz resonator?

1.Low

2.High

3.Medium

4.Low and High


Question:
Which resonator is a container/bottle of gas with an open hole?

1.Helmholtz

2.Coaxial

3.Dielectric

4.Crystal


Question:
Which scale is often convenient to measure sound pressures on a logarithmic scale?

1.Amplitude

2.Decibel

3.Threshold

4.Temperature


Question:
Which sounds are generally pitched regarding human speech?

1.Vowels

2. Consonants

3. Amplitude

4.Resonant


Question:
Who is capable of detecting a difference in frequency between two separate sounds that is as little as 2 Hz?

1.Young

2.Old

3.Musically trained

4.Infants


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