Hot water Power point 3 2025

Which type of cylinder is not vented?

• Unvented

• Vented

• Direct

• Indirect

What is the main component that supplies the cylinder in an indirect system?

• The heating element

• The larger CWSC

• The smaller cistern

• The gas line

What type of connection is used for the hot water draw-off?

• 2" male thread

• 1" male thread

• 3" male thread

• 4" male thread

What type of connection is used for the primary return?

• 1" male thread

• 2" male thread

• 3" male thread

• 4" male thread

What is the standard configuration for indirect cylinders in a hot water system?

• Fitted with one coil heated by the boiler

• Fitted with two coils heated by the boiler

• Fitted with one coil heated by solar panels

• Fitted with no coils

What is the thickness of insulation for modern hot water cylinders?

• 25mm

• 50mm

• 75mm

• 100mm

What might older cylinders need for additional insulation?

• A thermal blanket

• A cylinder jacket

• A foam cover

• A plastic wrap

What is the purpose of high heat recovery cylinders?

• To increase the water temperature

• To reduce heat loss

• To bring recovery time down from 25 minutes to 10 minutes

• To decrease water pressure

What is the original recovery time before using high heat recovery cylinders?

• 15 minutes

• 20 minutes

• 25 minutes

• 30 minutes

What type of corrosion can hot water cylinders suffer from when two or more dissimilar metals are joined together?

• Oxidative corrosion

• Galvanic corrosion

• Thermal corrosion

• Biological corrosion