Q. Septic tank is a small scale treatment unit.

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Q. The shape of the tank is circular.

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Q. The heavy particles in the tank _____

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Q. The scum formed in the tank _____

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Q. Which of the following methods are not used for the dispersion of the effluent out of a septic tank?

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Q. During the disposal of the sludge, it must be ______

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Q. What is the amount of water used per person per day for flushing?

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Q. The first chamber in a septic tank should be at least ______ of the total length.

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Q. Which of the following reasons is correct with respect to the need of providing baffle walls?

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Q. What are the product gases of anaerobic digestion?

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Q. What is the mixture of methane and carbon-dioxide of anaerobic digestion called?

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Q. Effluent sewer is also called as ______

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Q. Gravity systems are preferred over pumping systems for the flow of wastewater.

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Q. What is the function of two tanks provided in septic tank systems?

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Q. The longer the water is held in the tank, the better the treatment.

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Q. Large amount of wastewater constantly produced _________ the treatment time of wastewater in a septic tank.

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Q. ______ is called effluent.

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Q. What is the common effluent pipe from each house to a collection point called?

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Q. ______ allow the water to soak into the ground.

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Q. Oil and grease is the presence of inorganics in wastewater.

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