This set of Energy & Environment Management Multiple Choice Questions & Answers (MCQs) focuses on “Noise Pollution and its Effects”.
1. What is noise?
a) Desirable sound
b) Desirable and unwanted sound
c) Undesirable and unwanted sound
d) Undesirable and wanted sound
Explanation: Noise is defined as an undesirable and unwanted sound. Noise pollution affects human health and can contribute o a general deterioration of environmental quality. Several sources of noise pollution contribute to both indoor and outdoor noise pollution.
2. In which unit sound is measured?
Explanation: Noise pollution is measured in terms of decibel (dB). This parameter depends on the various environmental conditions. If the decibel level increased than the threshold it causes problems to humans and other organisms.
3. Which pollution cause hearing loss in organisms?
a) Air pollution
b) Noise pollution
c) Water pollution
d) Soil pollution
Explanation: Noise pollution can cause various health impacts on humans and other organisms. This health impacts leads to various issues like reduced in the mental health, hearing loss either temporary or permanent, loss in efficiency and many more.
4. What is the dB of a threshold of hearing?
Explanation: Decibel of the threshold of hearing is 0, for the rustle of leaves the dB is 10, for broadcasting studio dB is 20 and for Bedroom at night the dB is 30. This dB various based on the noise and the environmental conditions.
5. What is the dB of a threshold of pain?
Explanation: Threshold of pain is described as the maximum level in which one can sustain the noise after this the noise and cause several health related issues and it even damage the hearing capacity permanently or temporarily.
6. All sound is noise.
Explanation: Not all sound is noise. Sound is the voice below of the threshold of pain where organisms can listen to the voice without any struggle. But noise is the disturbance that arises in the sound and cause problems to organisms.
7. At what decibel instantaneous rupture of membrane happens?
Explanation: Instantaneous rapture of the membrane occurs at the decibel of 150. Threshold of pain is caused at the decibel of 146. If the noise level increased to 150 decibels than within no time there will be an instantaneous rupture of membrane occurs.
8. What is the ambient noise level in the residential one during night time?
a) 40 dB
b) 45 dB
c) 50 dB
d) 55 dB
Explanation: The ambient noise level in residential zone during night period is 45 dB. During day time the ambient noise levels in the residential area are 55 dB. Ambient noise levels are different for commercial zone and industrial zones.
9. What is called for a temporary hearing loss?
a) Temporary ear pain
b) Temporary hearing problem
c) Temporary threshold shift
d) Temporary hearing shift
Explanation: Temporary hearing loss is often called a ‘temporary threshold shift’. People suffering from this condition are unable to detect weak sounds. If a person got this problem, hearing ability is usually recovered within a month of exposure.
10. What is the permissible noise limit of 120 db?
a) 30 minutes
b) 2 minutes
c) 1 minute
d) 30 seconds
Explanation: One can hear 120 db for a duration of 30 seconds. For 30 seconds the permissible noise limits is 120 db. If someone hear more than this duration there are high chances of hearing loss and other mental health issues.
11. At what level a sound becomes physical pain?
a) Above 50 dB
b) Above 70 dB
c) Above 80 dB
d) Above 100 dB
Explanation: Sound is measured in terms of decibels (db). World Health Organization prescribed optimum noise level as 45 db during day time and 35 db during night time. Anything above 80 db is hazardous.
12. Which of the following sound is pleasant to our ears?
a) Heavy machinery
b) Transportation equipment
c) Loud noise
Explanation: Among the above options music is the only sound which pleasant our ears rest of the sounds cause irritation by its unpleasant noise and cause damage to the hearing permanently or temporarily.
13. Wildlife faces more problems than humans due to noise pollution, because animals dependent on_______________
Explanation: Animals develop a better sense of hearing than us since their survival depends on it. Wildlife faces far more problems than humans because wildlife depends on sound to protect themselves from enemies more than humans.
14. The degree of hearing loss depends on the duration as well as the intensity of the noise.
Explanation: For example, one hour of exposure to a 100 db sound level can produce a temporary threshold shift that may last for about one day. In factories workers subjected to high sounds for several hours in a day. It will cause hearing loss and other mental issues.
Sanfoundry Global Education & Learning Series – Energy & Environment Management.
To practice all areas of Energy & Environment Management, here is complete set of 1000+ Multiple Choice Questions and Answers.