Q. Which of the following represents the second stage BOD in the following figure?

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Q. The carbonaceous demand occurs due to oxidation of ______________

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Q. The nitrogenous demand occurs due to oxidation of ______________

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Q. Which of the following is correctly matched in the following figure?

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Q. The nitrogenous demand begins after how many days?

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Q. What is yellow curve represents in the following figure?

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Q. Which of the following is represented by the green curve in the following figure?

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Q. The maximum deficiency of dissolved oxygen is represented by ____________

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Q. Which of the following represents the oxygen sag curve in the following figure?

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Q. The oxygen deficit is maximum when?

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Q. When the BOD of wastewater increases, then?

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Q. Rate of aeration is independent of the D.O content of wastewater.

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Q. Which of the following represents the physical characteristics of water?

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Q. Which of the following is measured in mg/L?

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Q. Which of the following instrument is used to measure turbidity?

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Q. When the sewage becomes stronger, the turbidity of wastewater?

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Q. Which color indicates the fresh sewage?

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Q. The color of the septic sewage is __________

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Q. The odor in wastewater is measured by __________

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Q. In India, the average temperature of sewage is __________

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