A. More
B. Less
C. Equal
D. Somewhere more somewhere less
Related Mcqs:
- As compared to tap water the BOD of sewage polluted water shall be:
A. High
B. Low
C. Same
D. None of these - When excess of sewage is dumped in the river, its BOD:
A. Increases
B. Slightly decreases
C. Remains unchanged
D. Decreases drastically - With the increase in water pollution, the BOD:
A. Decreases
B. Increases
C. Remains the same
D. Is no measure of pollution - BOD of polluted water is increased by
A. Algae
B. Moss
C. Ferns
D. Distillated wastes - Which of the following enhances BOD of water?
A. Algae
B. Sand
C. Moss
D. Sugar mill effluents - Sewage drained into water bodies kills fishes because:
A. It gives off a bad small
B. It removes the food eaten by fishes
C. It increases the competition with fishes for dissolved oxygen
D. Excessive CO2 is added to water - Sewage water can be purified for recycling with the action of:
A. Aquatic plants
B. Penicillin
C. Micro-organisms
D. Fishes - Biological Oxygen Demand (BOD) is a measure of:
A. Industrial wastes poured into water bodies
B. Extent to which water is polluted with organic compounds
C. Amount of carbon monoxide inseparably combined with haemoglobin
D. Amount of oxygen needed by green plants during night - BOD is the amount of oxygen:
A. Present in water
B. Utilized by organisms in water
C. Utilized by micro-organisms for decomposition
D. Demanded by the producers for the production of food - BOD stands for:
A. Biotic oxygen deduction
B. Base of degradation
C. Biotic oxide demand
D. Biological oxygen demand
The correct answer to the question: "BOD value of sewage water than that of tap water is:" is "More ".
