System layouts and water softening

What system is this?

• Direct cold water

• Indirect boosted

• Direct boosted

• Direct boosted with drinking header

Scaling occurs in hot and cold-water systems when the water contains salts and minerals, such as

• Sulfur

• Potassium

• Calcium carbonate

• Magnesium

Which of the following water conditioners add a small amount of zinc to the water to supress the formation of calcium crystals?

• Magnetic

• Electrolytic

• Electronic

Water softeners are usually fitted as close to the water mains entry into the building as possible.

• True

• False

Designed to remove fine particles from the water. These filters comprise a mesh through which the water passes, trapping the sediment. The smaller the holes in the filter, the smaller the particles that can be removed. Which filter is described here?

• Activated carbon filter

• Ion exchange

• Sediment filter

• Reverse osmosis

A CWSC only supplying a hot water cylinder needs to be what size?

• 100L

• 150L

• 200L

• 250L

A CWSC on an indirect cold water system supplying outlets and the hot water cylinder needs to be what size?

• 150L

• 200L

• 230L

• 190L

What system is this?

• Direct

• Indirect

• Direct boosted

• Indirect boosted

On an indirect cold-water system, the distribution pipe to the outlets should be what size?

• 15mm

• 22mm

• 25mm

• 28mm

What is not needed on a direct system if the hot water is via a combi boiler?

• Filter

• Pressure relief

• CWSC

• Meter