The minimum dissolved oxygen required in water to save the aquatic life is

Related MCQs

• The percentage ratio of the oxygen available in sewage to the oxygen required to satisfy one stage of bio-chemical oxygen demand (B.O.D.) is termed as
• The amount of oxygen required for the biological decomposition of dissovled organic solids to occur under aerobic conditions is called bio-chemical oxygen demand (B.O.D.)
• The natural process in which the oxygen of water of streams is consumed by sewage and at the same time, it is replenished (filled again) by the atmosphere, is known as
• Bio-chemical oxygen demand (B.O.D.) of safe drinking water must be
• Dissolved impurities consist of
• The bacteria which require oxygen for their survival is known as
• The amount of oxygen consumed by sewage from an oxidising agent like potassium dichromate is termd as
• The bacteria which can survive without oxygen is called
• Bacteria which can survive with or without free oxygen is known as facultative bacteria.
• The most important source of water for public water supply is