Q. How many percentage of BOD removes in primary treatment?

View solution

Q. What is the main objective of secondary treatment of sewage plants?

View solution

Q. How many common approaches are used in secondary treatment?

View solution

Q. What is the meaning of ‘Tainting’ related to marine pollution?

View solution

Q. When drill cutting dumped on the seabed which toxic is produced?

View solution

Q. What happens if liquid oil contaminates a bird’s plumage?

View solution

Q. What is noise?

View solution

Q. In which unit sound is measured?

View solution

Q. Which pollution cause hearing loss in organisms?

View solution

Q. What is the dB of a threshold of hearing?

View solution

Q. What is the dB of a threshold of pain?

View solution

Q. All sound is noise.

View solution

Q. At what decibel instantaneous rupture of membrane happens?

View solution

Q. What is the ambient noise level in the residential one during night time?

View solution

Q. What is called for a temporary hearing loss?

View solution

Q. What is the permissible noise limit of 120 db?

View solution

Q. At what level a sound becomes physical pain?

View solution

Q. Which of the following sound is pleasant to our ears?

View solution

Q. Wildlife faces more problems than humans due to noise pollution, because animals dependent on_______________

View solution

Q. The degree of hearing loss depends on the duration as well as the intensity of the noise.

View solution