The time of contact for chlorination should be at least

Related MCQs

• When chlorine is added to raw water at more than one point, the process is termed as break point chlorination.
• Pre-chlorination
• Plain chlorination is adopted for treating the water having turbidities less than 20 to 30 ppm.
• In pre-chlorination, the raw water is treated with chlorine only.
• The amount of chlorine used for plain chlorination of water is about
• The privy pit should be located at least
• The maximum permissible chlorine content for public supplies should be between
• In the process of screening, the screens should be inclined at an angle of
• The length of rectangular sedimentation tank should not be more than
• The maximum permissible total solid content in water for domestic purposes should not exceed