Cleaning is done by(i) Scraping and removal of top layer in slow sand filter;(ii) Back washing in slow sand filters;(iii) Scraping and removal of top layer in rapid sand filter;(iv) Back washing in rapid sand filters.The correct answer is

Cleaning is done by(i) Scraping and removal of top layer in slow sand

1.	Cleaning is done by(i) Scraping and removal of top layer in slow sand filter;(ii) Back washing in slow sand filters;(iii) Scraping and removal of top layer in rapid sand filter;(iv) Back washing in rapid sand filters.The correct answer is
A.	(i) and (iv)
B.	(ii) and (iii)
C.	(ii) and (iv)
D.	(i) and (iii)
Answer» B. (ii) and (iii)

Discussion

No Comment Found

Related MCQs

Physical adsorption ________ with increase in temperature.
What is the highest enthalpy of adsorption for chemical adsorption?
Chlorine is used as the disinfectant in a municipal water treatment plant. It achieves 50 percent of disinfection efficiency measured in terms of killing the indicator microorganisms (E-Coli) in 3 minutes. The minimum time required to achieve 99 percent disinfection efficiency would be
24,00,000 litres of water passes through a sedimentation tank which has 300 cubic meter volume per day. The detention time for the tank is:
Assertion A: Alum is the most commonly used coagulant in water treatment.Reason R: Alum is very effective in killing pathogens present in the water.Which of the following is correct?
Aeration of water is done to remove:
If the length dimension of a square filter bed increases to two times (while the rate of filtration remains unchanged), the amount of water filtered would become
A rural water supply scheme serves a population of 10,000 at the rate of 50 litres per capita per day. For the chlorine dose of 2 ppm, what will be the required amount of bleaching with 20% available chlorine?
A suspension of sand like particles in water with particles of diameter 0.10 mm and below is flowing into a settling tank at 0.10 m3/s. Assume g = 9.81 m/s2 , specific gravity of particles = 2.65, and kinematic vescosity of water = 1.0105 x 10-2 cm2/s. The minimum surface area (in m2) required for this settling tank to remove particles of size 0.06 mm and above with 100% efficiency is_________
Consider the following statements regarding removal of impurities from water:1. Settleable solids are removed by filtration.2. Volatile solids are removed through sedimentation.3. Dissolved solids are removed through reverse osmosis.4. Colloidal solids are removed by coagulation.Which of the above statements are correct?

Cleaning is done by(i) Scraping and removal of top layer in slow sand filter;(ii) Back washing in slow sand filters;(iii) Scraping and removal of top layer in rapid sand filter;(iv) Back washing in rapid sand filters.The correct answer is

Discussion

No Comment Found

Related MCQs

Reply to Comment