Q. A built up rolled steel section carrying compressive force is called ___________

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Q. The process of removing chlorine from water is known as ____________

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Q. The organic impurities in the water from a layer on the top of a filtering media are called _______

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Q. The rate of filtration in slow sand filter is ___________

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Q. The sand used for filtration should not lose weight more than ________ when placed in Hcl for 24 hours.

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Q. Cleaning period of slow sand filter is taken as __________

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Q. The efficiency of slow sand filter is about ___________

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Q. What is the uniformity coefficient of sand used in the rapid sand filter?

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Q. The dosage of ozone is about ________ ppm residual ozone.

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Q. Which of the following process is also known as Ion exchange process?

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Q. Aeration is effective in removing of _________ odours.

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Q. Which of the following is a control measure of removal of colour, taste and order?

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Q. _____________ of column mainly depends upon end conditions.

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Q. The hinged end is also known as ___________

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Q. Long columns fail due to ____________

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Q. In short columns, the slenderness ratio is less than __________

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Q. For ___________ columns, the slenderness ratio is more than 32 and less than 120.

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Q. Radius of gyration is denoted by __________

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Q. The __________ is the distance between Centres to centre of effective lateral ends.

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Q. The slenderness ratio is the ratio of effective length to least ______________

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