Sanitizer used specifically for vitreous enamel are
...Sanitizer used specifically for vitreous enamel are
strong alkalis
strong acids
weak alkali with sodium silicate
none of these
Correct answer is C
No explanation has been provided for this answer.
The methods used for biological treatment are ...
Discoloration can be achieved by using ...
When temporary hard water is boiled, one of the substances formed is ...
Permanent hard water may be softened by passing it through ...
Hardness of water does not ...
Secondary treatment uses __________ to consume wastes. ...
Which of the enzyme combination is commercially used for the removal of oxygen? ...