Question 1

What is potable water?

Accepted Answer

Water safe for human consumption. Potable (or wholesome) water is water that is safe for drinking and domestic use. It has been treated to meet drinking water standards.

Question 2

Where does potable water come from?

Accepted Answer

Treated sources such as reservoirs or groundwater. Potable water comes from treated sources  -  reservoirs, rivers, or groundwater  -  processed at treatment works before distribution.

Question 3

What is another term for potable water?

Accepted Answer

Wholesome water. Potable water is also called wholesome water  -  water that meets drinking water standards.

Question 4

Why must potable water be protected?

Accepted Answer

To prevent illness and comply with regulations. Contaminated water causes serious illness  -  gastrointestinal disease, Legionnaires' disease, chemical poisoning  -  and breaches water regulations.

Question 5

What is hard water?

Accepted Answer

Water with high mineral content. Hard water contains dissolved calcium and magnesium minerals. It causes limescale build-up in pipes, cylinders, and appliances.

Question 6

What problem does hard water cause in heating systems?

Accepted Answer

Limescale build-up reducing efficiency and lifespan. Hard water deposits limescale inside pipes, heat exchangers, and cylinders, insulating them and reducing heat transfer efficiency.

Free cold water systems exam questions

1. What is potable water?

2. Where does potable water come from?

3. What is another term for potable water?

4. Why must potable water be protected?

5. What is hard water?

6. What problem does hard water cause in heating systems?

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