Q. What is the effective size of Anthracite when used as a filter material?

View solution

Q. Consider the following statement regarding the depth of sand of the rapid gravity filter?

i. It should be checked against breakage of floc
ii. The sand depth should lie between 100-200cm
iii. The floc should be attached through the sand bed

Which of the above statement is/are correct?

View solution

Q. Which of the following statement is wrong regarding Anthracite?

View solution

Q. The minimum depth of sand of a rapid sand filter is given by __________

View solution

Q. The thickness of the base material of a rapid sand filter on which filter media are supported is __________

View solution

Q. In which type of under drainage system of rapid sand filter, laterals are provided with strainers?

View solution

Q. Which device is used to supply air for the agitation of sand grains during washing of filters?

View solution

Q. The loss of head during cleaning operation of a rapid sand filter is __________

View solution

Q. The thickness of the suspended matter on top of the sand bed is __________

View solution

Q. When the loss of the head exceeds the static head, the head becomes _____

View solution

Q. What is the permissible negative head loss of a rapid sand filter?

View solution

Q. Which type of problem is caused in filter due to the accumulation of solids on the top surface of filter media?

View solution

Q. ______ are formed in filters due to insufficient washing of sand grains.

View solution

Q. The cracking of bed is more prominent __________

View solution

Q. In which type of filtration problem, layers of gravel are displaced?

View solution

Q. The tendency of jetting can be minimized by __________

View solution

Q. _______ type of trouble in filter is caused by the released of dissolved air and gases from water.

View solution

Q. How the problem of sand incrustation can be minimized?

View solution

Q. In which of the following filters, the rate of filtration is highest?

View solution

Q. The final loss of head in slow sand filter is ______ than rapid sand filter.

View solution