potable

Straining of plumbing fixtures may be caused by iron concentrations as low as?

0.3 Ppm

The approximate amount of water that a gallon of chlorine bleach at a solution of only 1 ppm will treat is?

10,000 gallons

Most residential pasteurization systems disinfect water at a slow hourly rate, typically____?

20 to 24 gallons per hour

The percentage of impurities removed from water by a distillation system is approximately?

99%

Fine solid particles can be precipitated out of water by adding

Alum

Turbidity in water is commonly treated by using a

Diatomaceous earth filter

Acid in the water can react with copper pipe to leave stains that are

Green

In addition to its disinfectant properties, chlorine also will?

Remove iron and sulfur from water

Water under high pressure is forced through a membrane in a(n)

Reverse osmosis system

Public water utilities use lime in treatment process to remove?

acidity

At the end of each workday, all installed pipes should be___?

capped

Once a water-softener installation is completed, the unit must be?

disinfected

Water hardness is measured in grains per

gallon

Water that contains a high percentage of minerals is called?

hard water

Calcium and magnesium in water are the cause of

hardness

A red, slippery jelly formed on the inside of a toilet is caused by

iron eating bacteria

An activated carbon filter will remove

organic chemicals

The purpose of the quartz sleeve in an ultraviolet-light system is to__?

prevent the water in the disinfecting chamber from cooling the lamp

To treat salty water, the usual method is to install a

reverse osmosis system

Mineral salts dissolved in water form a coating inside pipes that is referred to as___?

scale