9189PH2CWPPT1Q1

What is the term used to describe the formation of hard limescale that sticks to the inside of pipes and appliances due to the presence of salts and minerals in water?

• Condensation

• Precipitation

• Evaporation

• Filtration

Which of the following is NOT a method used to prevent the precipitation of limescale in water systems?

• Water conditioners

• Water softeners

• Water filters

• Water heaters

Scaling problems in water systems are more likely to occur in which type of water areas?

• Soft water areas

• Hard water areas

• Saltwater areas

• Freshwater areas

What is the consequence of precipitation in water systems on appliances?

• Increases the appliance's efficiency

• Changes the color of the appliance

• Makes the appliance unusable in some cases and reduces efficiency

• Has no effect on the appliance

What is the purpose of a magnetic water conditioner in a cold water service to the property?

• It adds zinc to the water to suppress the formation of calcium crystals.

• It uses dissolved hardness salts and minerals to cluster together on surfaces.

• It prevents scale build-up by influencing the type of calcium crystals precipitated.

• It washes away any crystals that are formed by the flow of water.

Which type of water conditioner is used for individual appliance protection, such as a combi boiler?

• Electronic (electromagnetic) water conditioner

• Electrolytic water conditioner

• Magnetic water conditioner

• None of the above

How do electrolytic water conditioners work?

• By adding a minute amount of zinc to the water.

• By using magnetic fields to change calcium crystal formation.

• By clustering dissolved hardness salts and minerals together.

• By heating the water to prevent scale build-up.

What is the function of an electronic (electromagnetic) water conditioner?

• It adds zinc to the water to suppress the formation of calcium crystals.

• It prevents scale build-up by influencing the type of calcium crystals precipitated.

• Changes the shape of the limestone to stop it clumping together

• It is used for individual appliance protection only.

What is the purpose of a water softener?

• To heat water

• To remove water hardness

• To filter out contaminants

• To store excess water

Where are water softeners usually installed in relation to the water's main entry into the building?

• Far from the main entry

• Outside the building

• As close to the main entry as possible

• In the bathroom only