What are localized systems in the context of instantaneous hot water systems?

• Systems that are designed to serve multiple outlets at various positions

• Systems that are usually installed close to the centralized hot water supply

• Systems that are designed to serve one outlet at the position where it is needed

• Systems that require manual operation for each use

Where are localised instantaneous water heaters usually sited?

• Below the sink

• Above the sink but under the sink types

• On the floor next to the sink

• Outside the bathroom

Localised instantaneous water heaters are generally used to supply small quantities of hot water to which of the following?

• Kitchen sinks and washing machines

• Hand-wash basins and showers

• Central heating systems

• Outdoor pools

What principle does the multi-point instantaneous water heater work on to create a pressure differential across the gas valve?

• Pascal's principle

• Archimedes' principle

• Bernoulli's principle

• Newton's third law

What is the function of the venturi tube in the multi-point instantaneous water heater?

• To heat the water

• To create a pressure differential

• To store hot water

• To extinguish the pilot flame

Is there a limit to the amount of hot water that can be delivered by the multi-point instantaneous water heater?

• Yes, there is a specific storage capacity

• No, as long as the tap is running, hot water will be delivered

• Yes, it is limited by the size of the heat exchanger

• No, but it is limited by the gas supply

What is the function of the component labeled "Expansion chamber" in the thermal store system?

• To mix hot and cold water

• To store extra water heated by the boiler

• To allow for the expansion of water when it heats up

• To pump water through the system

What is the purpose of the "Adjustable thermostatic mixing valve" in the gas- or oil-fired combined primary storage unit?

• To control the flow of gas to the burner.

• To regulate the temperature of the hot water outlet.

• To circulate the central heating flow and return.

• To ignite the gas burner.

What characterizes a localised hot water system?

• It involves heating water at a central point and distributing it throughout the dwelling.

• It is a system where hot water is delivered by a small water heater at multiple points where it is needed.

• It is a system where hot water is delivered by a small water heater at the point where it is needed.

• It is a system that heats water on a schedule, regardless of demand.

An electric shower is a form of?

• Direct single point hot water

• Indirect single point hot water

• Indirect multi point hot water

• Direct multi point hot water