Which of the following is the first step in treating water from a muddy stream?
a. Measuring the chlorine residual.
b. Adding calcium hypochlorite.
Adding iodine tablets.
d. Removing dirt and/or debris.
A Lyster bag of water normally requires ______ calcium hypochlorite ampule(s) to
establish a five ppm chlorine residual.
The amount of chlorine needed to kill the disease-producing organisms in a
container of water is called the:
a. Chlorine demand.
b. Chlorine dosage.
d. Chlorine residual.