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Noise-pollution Questions Set 2:

Quiz Mode

___ dB of noise level causes 'Major permanent damage, if prolonged'

120

190

Solution:

The reference pressure used in the determination of sound pressure level (SPL) is

20 µPa

20 dB

10 µPa

10 dB

Solution:

The sound pressure that a normal healthy individual can hear is

0.2 micro pascals

2 micro pascals

20 micro pascals

55 micro pascals

Solution:

What is the term used to describe the reduction of noise pollution by absorbing or deflecting sound waves?

attenuation

reflection

diffusion

refraction

Solution:

What are the economic costs associated with noise pollution?

Increased health care expenses

Reduced property values

Decreased productivity

All of the above

Solution:

What type of noise can be reduced by providing lining on walls and ceiling with sound-absorbing materials?

Source noise

Reflection noise

Structural noise

Direct airborne noise

Solution:

If the decibel level of noise pollution in a certain area is measured at 85 dB, what is the increase in noise pollution level compared to a reference level of 50 dB?

35 dB

30 dB

25 dB

20 dB

Solution:

A machine in a steel plate fabricating industry is found to be producing a sound level of 50 dB. If one more such machine is added, what will be the combined noise level?

80.65 dB

40.50 dB

101.23 dB

53.01 dB

Solution:

How is noise pollution related to other environmental problems?

It has no relationship

It exacerbates other problems

It is entirely separate from other environmental problems

It is intertwined with other environmental problems such as air pollution and climate change.

Solution:

Which of the following pairs are correctly matched?

Reverberation time: Time required to reduce noise by 60dB

NIPTS: Responsible for permanent hearing loss

Sound foci: Formed when sound waves are reflected from concave surface

TTS: Responsible for temporary hearing loss

Noise-pollution Questions Set 2:

___ dB of noise level causes 'Major permanent damage, if prolonged'

Solution:

The reference pressure used in the determination of sound pressure level (SPL) is

Solution:

The sound pressure that a normal healthy individual can hear is

Solution:

What is the term used to describe the reduction of noise pollution by absorbing or deflecting sound waves?

Solution:

What are the economic costs associated with noise pollution?

Solution:

What type of noise can be reduced by providing lining on walls and ceiling with sound-absorbing materials?

Solution:

If the decibel level of noise pollution in a certain area is measured at 85 dB, what is the increase in noise pollution level compared to a reference level of 50 dB?

Solution:

A machine in a steel plate fabricating industry is found to be producing a sound level of 50 dB. If one more such machine is added, what will be the combined noise level?

Solution:

How is noise pollution related to other environmental problems?

Solution:

Which of the following pairs are correctly matched?

Solution:

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