Environmental Engineering in CE
Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by

Both A & B
Photosynthetic action of algae
Neither A nor B
Natural aeration of water stream

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Environmental Engineering in CE
Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is

Proportional to the pressure of the gas
Proportional to the viscosity & density of the gas
Both B and C
Inversely proportional to viscosity of gas

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