The amount of residual chlorine left in public water supply for safety against pathogenic bacteria is about:
A0.05 to 0.5 ppm
B0.5 to 1.0 ppm
C1.0 to 5.0 ppm
D0.01 to 0.05 ppm
No.1 PSC Learning App
★
★
★
★
★
Related Questions:
To cover one square meter of pitched roof......... number of MP tiles are required
When the velocity of flow of fluid does not change, both in magnitude and direction, from point to point in the flowing fluid, for any given instant of time, the flow is said to be :
A standard measure of ductility of a material is:
Ball bearings are provided with a cage:
In a land measuring metric chain the ends of link is connected by