Q. Which of the following is true for screens and comminutors?

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Q. Screen is the first unit operation in wastewater treatment plant.

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Q. __________ wastewater treatment plant may or may not need the screens.

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Q. How many types of screens are present?

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Q. Lower the velocity through the screen, the ________ is the amount of screening that would be removed.

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Q. What is the approach velocity for grit bearing wastewaters?

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Q. Which of the following does the quantity of screening does not depend on?

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Q. The head lost by water flowing in a channel as a result of turbulence caused by the velocity of the flowing water is called ________

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Q. What is the maximum allowable head loss for a manual coarse screen?

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Q. At what angle generally a coarse manual screen is placed?

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Q. Which of these screens can handle very large particles?

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Q. From which of these type of screens there is a possibility of odour emission?

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Q. Which of these screens have a very large footprint?

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Q. With respect to the operation which of these screens is the most expensive?

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Q. Which of these type of screen can be used both as a fine and coarse screen?

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Q. What is the maximum allowable approach velocity for a bar screen at peak flow rates?

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Q. What should be installed in order to control the velocity of the bar screens?

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Q. What is the mathematical representation of hydraulic loses through a screen?

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Q. Which of these screens is used to remove secondary suspended solids?

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Q. What is the headloss for fine screens?

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