Unit 305 Cold Water phase 2

What are the key stages in the rainwater cycle?

• evaporation, condensation, precipitation

• filtration, sedimentation, disinfection

• absorption, desalination, distillation

• oxidation, reduction, ionization

Describe the two main types of water supply to dwellings and how these are regulated.

• solar-powered pumps (regulated by sunlight intensity), gravity-fed systems (regulated by water pressure)

• mains water supply (regulated by water utility companies), private water sources (regulated by local authorities)

• rainwater harvesting (regulated by weather conditions), well water (regulated by depth)

• desalination plants (regulated by salt content), water purification systems (regulated by filtration)

How does water move through the rainwater cycle?

• from atmosphere to ground, from ground to atmosphere, from atmosphere to ground again

• from ground to atmosphere, from atmosphere to ocean, from ocean to ground

• from ocean to atmosphere, from atmosphere to river, from river to ground

• from soil to underground aquifers, from aquifers to rivers, from rivers to lakes

What factors can affect the quality of water from different sources?

• temperature, pressure, pH level

• turbidity, dissolved oxygen levels, presence of pollutants

• salinity, hardness, conductivity

• all of the above

What is the primary purpose of water treatment in a cold water system?

• to make water taste better

• to remove impurities and contaminants

• to increase water pressure

• to decrease water temperature

How are public water supplies typically treated to ensure safety for consumption?

• chlorination, fluoridation, filtration

• distillation, reverse osmosis, ozonation

• ultrafiltration, ion exchange, activated carbon absorption

• coagulation, sedimentation, disinfection

What is the role of pressure in a cold water system?

• to increase water temperature

• to decrease flow rate

• to push water through pipes

• to reduce water pressure

Why is it important to prevent backflow in a cold water system?

• to maintain water purity and safety

• to increase water pressure

• to improve water taste

• to reduce water temperature

What is the purpose of a cold water storage tank in a building?

• to heat water

• to cool water

• to pressurize water

• to store water for later use

How can water conservation be promoted in a cold water system?

• by using low-flow fixtures

• by increasing water pressure

• by heating water to high temperatures

• by adding chemical additives to water