Water Pollution
Name any one large scale water purification method
Filtration, Chlorination,Storage
Name the secondary air pollutant formed in the atmosphere.
Ozone
What is the unit used to measure sound intensity?
Decibel (dB)
What type of radiation has the least penetrating power?
Alpha radiation
Which indicator organism suggests fecal contamination of water?
Escherichia coli
Temperature inversion causes smog. True or False?
True
Normal conversation occurs at which decibel?
60 to 65 dB
Which is the SI equivalent of Roentgen?
Couloumb per kilogram
Name any two indicators of water pollution.
amount of total suspended solids,
biochemical oxygen demand (BOD) at 20 deg. C,
concentration of chlorides, nitrogen and phosphorus and
absence of dissolved oxygen.
Name any one best indicator of air pollution
Sulphur dioxide,smoke and suspended particulate matter
In audiogram, Noise-induced hearing loss shows a characteristic dip in the curve at which frequency?
4000 Hz
Radiation dose is measured by
Dosimetry
High nitrate content of water is associated with which disease?
Methaemoglobinemia
Name any two prevention and control method for air pollution recommended by WHO.
Containment,Replacement,Dilution,International Action,Legislation
Auditory fatigue occurs at which dB?
90 dB
Permissible level of radiation from man made sources should not exceed ___ rad per year.
5
Name the law that prevents against water pollution launched in 1974.
Water (Prevention and Control of Pollution ) Act.
Who does air pollution monitoring in India?
The National Air Quality Monitoring Programme, sponsored by the Central Pollution Control Board
Which part of the ear is primarily damaged by excessive noise?
Cochlea or Organ of Corti
What principle states that radiation exposure should be kept as low as possible?
ALARA principle