Plumbing Quiz

What is the maximum diameter of pipework covered in the unit for hot water systems in dwellings and industrial/commercial properties?

• 20mm

• 28mm

• 35mm

• 50mm

Answer explanation

The maximum diameter of pipework covered in the unit for hot water systems in dwellings and industrial/commercial properties is 28mm, as specified.

Upon completion of the unit, learners will be able to do which of the following for hot water systems and components?

• Install only

• Service and maintain only

• Decommission only

• Install, service, maintain, and decommission

Answer explanation

Upon completion of the unit, learners will be able to install, service, maintain, and decommission hot water systems and components.

What is the size of the vent pipe shown in the diagram?

• 15mm

• 22mm

• 28mm

• 32mm

Answer explanation

The size of the vent pipe shown in the diagram is 22mm, as indicated in the correct answer choice.

Where does the vent pipe discharge into?

• Directly outside

• Into the CWSC

• Into the main water supply

• Into the heating system

Answer explanation

The vent pipe discharges into the CWSC, not directly outside, into the main water supply, or into the heating system.

What is the purpose of the top immersion heater?

• To cool down the water in the system

• To provide heating for the entire house

• For day time top up, all the water in the cylinder

• For day time top up, bottom immersion heater heats up all the water in the cylinder via a time controller for use with cheap rate overnight electricity

Answer explanation

For day time top up, bottom immersion heater heats up all the water in the cylinder via a time controller for use with cheap rate overnight electricity

What is the size of the cold feed to the secondary hot water system?

• 15mm

• 22mm

• 22mm or 28mm

• 32mm

Answer explanation

The size of the cold feed to the secondary hot water system can be either 22mm or 28mm, as both are correct options for this system.

What is the size of the draw-off to the bath before it is reduced for other appliances?

• 15mm

• 22mm

• 28mm

• 32mm

Answer explanation

The size of the draw-off to the bath before it is reduced for other appliances is 22mm, as indicated in the correct answer choice.

What is the purpose of a centralised hot water system?

• To supply hot water to a single appliance only

• To supply every hot water outlet from a central position in the property

• To supply hot water for small amounts only

• To supply hot water to outdoor areas exclusively

Answer explanation

To supply every hot water outlet from a central position in the property

Where is a localised hot water system typically situated?

• Near to where the hot water is needed

• In a central position in the property

• In outdoor areas only

• In residential buildings exclusively

Answer explanation

A localised hot water system is typically situated near to where the hot water is needed for efficient and quick access.

Which of the following is a typical use for a localised hot water system?

• Heating a swimming pool

• Supplying hot water to an entire apartment complex

• Supplying hot water to a kitchen sink in an office

• Central heating for a large building

Answer explanation

A localised hot water system is typically used to supply hot water to a kitchen sink in an office, making it the correct choice among the options provided.