Q. The test for finding the optimum coagulant dose in water is ____________

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Q. The detention period for a sedimentation tank where coagulation takes place is ____________

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Q. The overflow rate for a plain sedimentation tank is ______ litre/day/metre².

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Q. The deviation from the ideal flow of wastewater in the sedimentation tank causes ____________

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Q. Which of the following cannot be the velocity of flow in the horizontal flow sedimentation tank?

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Q. What is the settling velocity of the particle in the wastewater if its diameter is 2 * 10⁻³ cm. Given G=2.65, viscosity v=8 * 10⁻³ cm²/Sec?

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Q. When the impurities are separated by the gravitation of settling particles, the operation is called ______

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Q. In which type of sedimentation, the flocculent suspension of high concentration takes place?

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Q. In which type of sedimentation, the flocculent suspension of the intermediate concentration takes place?

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Q. How many types of sedimentation tanks are there on the basis of the method of operation?

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Q. _______ is formed when alum is added to sewage.

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Q. In which type of settling, settling of particles takes place by the contact of impurities with each other present in wastewater?

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Q. In the expression vS = 1.8 (g*d (G-1))½, the diameter of spherical particle is ____________

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Q. The settling velocity of spherical particle is given by ____________

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Q. How many types of settling are there in the sedimentation tank?

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Q. Consider the following statements regarding diatomite filters.

i. They are not used for water having high turbidity.
ii. They are not suitable for municipal water supplies.
iii. They are not used for temporary and shifting camps.

Which of the above statement is/are false?

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Q. The diatomite is applied on the septum at the rate of ______

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Q. What is the thickness of a layer of a diatomite filter?

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Q. What is the diameter of drum of a Micro-Strainer?

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Q. Which device is used for screening stored water which do not contain microscopic sized particles?

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