Noise level in a quiet private business office is about __________ decibels.
Noise level in a quiet private business office is about __________ decibels.
Bacterial aerobic oxidation of polluted water in biological oxidation ponds is d
Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in
Noise level during normal conversation among men is about __________ decibles.
Noise level during normal conversation among men is about __________ decibles.
In a sedimentation tank, the detention period for water ranges from __________ h
In a sedimentation tank, the detention period for water ranges from __________ hours.
TLV of aldrin in public water supply system is about __________ μg/litre.
TLV of aldrin in public water supply system is about __________ μg/litre.
In sewage treatment, the detention period allowed for oxidation ponds ranges fro
In sewage treatment, the detention period allowed for oxidation ponds ranges from __________ weeks.
A standard test for determination of hardness in water is termed as __________ t
A standard test for determination of hardness in water is termed as __________ test.
Which of the following is an adsorbant used for the removal of SO 2 from gas/air
Which of the following is an adsorbant used for the removal of SO 2 from gas/air?
Main pollutants released from iron & steel industry is
Main pollutants released from iron & steel industry is
Maximum permissible limit of industrial noise as recommended by World Health Org
Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels.
The principal gas evolved from sludge digestion tank is
The principal gas evolved from sludge digestion tank is
Fluorosis is caused due to the presence of excessive amount of __________ in dri
Fluorosis is caused due to the presence of excessive amount of __________ in drinking water.