Breakpoint chlorination of water involves addition of chlorine in an amount sufficient to:

Blue baby disease (methaemoglobinemia) in children is caused by the presence of excess

Water flows at a rate of 10 m³/s in a rectangular channel 3 m wide. The critical depth of flow is

A saturated clay
stratum draining both at the top and bottom undergoes 50 percent
consolidation in 16 years under an applied load. If an additional
drainage layer were present at the middle of the clay stratum, 50
percent consolidation would occur in

Coagulation-flocculation with alum is performed :

Chlorine is some times used in sewage treatment

The disinfection efficiency of chlorine in water treatment

Mechanical stabilization requires :

Pipingin soil occurs when

The group index of a soil subgrade is 7. The subgrade soil is rated as