Q. When was the rapid sand filer first used?

View solution

Q. Rapid sand filters require large area compared to slow sand filters.

View solution

Q. Pressure flow is considered in rapid filtration.

View solution

Q. Which of the following processes is not done before rapid filtration?

View solution

Q. The direction of water in filter beds is reversed for ______

View solution

Q. For a rapid sand filter, what is the ratio of length: breadth while designing it?

View solution

Q. Calculate the area of the rapid sand filter for the following details.

Flow: 2000 m³/h.
Velocity: 5 m/h
Backwash time: 30 mins

View solution

Q. Calculate the length of the rapid sand filter for the following details.

Flow: 1000 m³/h.
Velocity: 5 m/h
Backwash time: 30 mins

View solution

Q. Calculate the breadth of the rapid sand filter for the following details.

Flow: 500 m³/h.
Velocity: 5 m/h
Backwash time: 20 mins

View solution

Q. What is the turbidity achieved by using a rapid filtration system?

View solution

Q. What is the limit of turbidity which a 2 stage filtration a handle?

View solution

Q. What is the height of the anthracite maintained in a dual media filter?

View solution

Q. What is the height maintained of a deep bed monomedia?

View solution

Q. Disc filter is similar to a screen filter.

View solution

Q. Filtration is based on colour of particles.

View solution

Q. Which of the following parameter is used by disc filters?

View solution

Q. Discs are colour coded to denote _______

View solution

Q. What is the common unit used to measure filtration quality?

View solution

Q. What is the value for the finest level of filtration?

View solution

Q. What is the value for coarse filtration?

View solution