Q.

The total hardness of the potable water should be less than  

A. 500 ppm
B. 700 ppm
C. 900 ppm
D. 1000 ppm
Answer» A. 500 ppm
Explanation: the total hardness of the potable water should be less than 500 ppm. water having hardness more than 500 ppm is not safe for consumption.
1.5k
0
Do you find this helpful?
5

Discussion

No comments yet