You are disinfecting water in a Lyster bag. You have just added the calcium
hypochlorite solution and flushed the faucets. You should test the chlorine
b. In 10 minutes.
In 20 minutes.
d. In 30 minutes.
e. In one hour.
You are using the five-ppm tube while testing chlorine residual and have properly
prepared the test solution. The color of the solution is a lighter shade of yellow
than the yellow band on the tube. This means that the chlorine residual level of
the water sample is ________________ five ppm.
a. Less than.
b. More than.
What is the purpose of flushing the faucets of the Lyster bag?
a. To relieve the pressure inside the bag.
b. To remove debris and sediment.
To disinfect the inside parts of the faucets and to ensure that no unchlorinated
water is trapped inside them.
d. To allow any undissolved calcium hypochlorite to escape.