Turbidity of water is an indication of the presence of
Turbidity of water is an indication of the presence of
BOD of raw municipal sewage may be in the range of about __________ mg/litre.
BOD of raw municipal sewage may be in the range of about __________ mg/litre.
Noise level heard at a distance of about 100 metres from a jet engine with after
Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels.
The lowest layer of atmosphere is known as the
The lowest layer of atmosphere is known as the
Maximum allowable noise exposure limits for a man working for 8 hours a day in a
Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels.
__________ is the process of killing organism in water.
__________ is the process of killing organism in water.
The maximum permissible noise level to which a man working in a chemical plant c
The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about…
__________ content of the phosphate rock is the pollutant of primary interest in
__________ content of the phosphate rock is the pollutant of primary interest in a phos-phatic fertiliser plant.
Noise emitted by a ventilation fan at a distance of 3 metres is about __________
Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels.
The amount of chemical coagulant added for treatment of polluted water _________
The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.
Noise level inside a jet air liner in normal flight is about __________ decibels
Noise level inside a jet air liner in normal flight is about __________ decibels.
If carbon monoxide content in atmospheric air exceeds __________ ppm, death is b
If carbon monoxide content in atmospheric air exceeds __________ ppm, death is bound to occur.