A.Zero
B.1 – 4 ppm
C.15 – 25 ppm
D.3 – 50 ppm
E.30 – 50 ppm
Related Mcqs:
- The maximum permissible level or pesticides, in general, in drinking water is nearly
- The permissible level of HCN in drinking water is
- Out of the following metals the least permissible percentage in drinking water is
- The maximum concentration of lead in drinking water should not exceed.
- Turbidity in water is due to
- Turbidity in water may be removed by
- Turbidity of water is usually measured in terms of
- A seamless water main 1 metre in diameter is required to carry wter under a head of 100 metres. If the maximum permissible tensile stress in the metal is 500 kg/cm2, the thickness of metal required would be
- Turbidity in boiler feed water causes
- On board ships, the source of drinking water may be
