The under drainage system in a rapid sand filters

Related MCQs

• Rapid sand filters are cheap and economical as compared to slow sand filters.
• The effective size of sand particles for rapid sand filters varies from
• The under drainage system in slow sand filters
• Cleaning of rapid sand filters is done by
• The coefficient of uniformity for rapid sand filters is
• The effective size of sand particles for slow sand filters varies from
• Water is forced at a preseure higher than the atmospheric pressure in rapid gravity filters.
• The coefficient of uniformity for slow sand filters is
• Rpid sand filters are suitable for small towns and villages.
• In a rapid sand filter, the filter head varies from