8202CWPPT5L3

The chemical and microbiological content of the water must be established and tests performed to determine the effectiveness of any treatment process and the chemical dosing requirements.

• True

• False

According to the passage, what are point of entry treatment methods usually used for?

• Residential properties

• Commercial properties or multiple supplies to properties

• Agricultural properties

• Industrial waste treatment

A full survey should be carried out to examine the condition of the immediate site, as well as testing to determine the _______ and _______ condition of the water and the appropriate treatment.

• chemical; microbiological

• physical; electrical

• thermal; optical

• mechanical; magnetic

Treatment for supplies to a single dwelling should include _______.

• disinfection

• filtration

• chlorination

• boiling

The disinfection stage should only be discarded if it can be shown, without reasonable doubt, that by frequent testing and risk assessment the water supply is likely to be pathogen-free on a consistent basis.

• True

• False

What do activated carbon filters remove from water?

• Suspended solids, chlorine, and some organic contaminates

• Only bacteria

• Only chlorine

• Only suspended solids

Activated carbon filters remove certain humic acids, which give water derived from peat a _______ colour.

• brown

• blue

• green

• red

Activated carbon filters can aid the development of micro-organisms, which may re-enter the water system and cause health problems.

• True

• False

The principle of reverse osmosis units involves forcing water under pressure through a ________ membrane. Fill in the blank.

• semi-permeable

• impermeable

• conductive

• magnetic

Why is polyamide preferred over cellulose for reverse osmosis membranes?

• Polyamide is cheaper

• Cellulose supports bacteria growth

• Polyamide is more colorful

• Cellulose is more expensive