Hot Water Systems Quiz

Which of the following is a type of instantaneous system in a localised or single point system?

• Gas fired

• Electric

• Open vented hot water heater

• Unvented hot water heater

Which component in the diagram is responsible for heating the stored water?

• The cold feed connection

• The primary flow connection

• The internal coil

• The primary return connection

What is the normal diameter of the primary feed and return pipework in an indirect hot water supply system?

• 22mm

• 28mm

• 25mm

• 30mm

What is the purpose of the pipework layout shown in the diagram?

• To show the layout of a central heating system

• To show the layout of a solar water heating system

• To show the cold main inlet via safety valves and unvented hot water outlet

• To show the layout of a water filtration system

Which component ensures that the water temperature does not exceed 100ºC in the unvented hot water system?

• Thermostat

• Mechanical safety devices

• Pressure gauge

• Water filter

Which type of centralised instantaneous hot water system operates in a similar fashion to instantaneous hot water heaters but also has a central heating capability?

• Gas-fired instantaneous

• Gas- or oil-fired combination boilers

• Gas- or oil-fired combined primary storage units

• Thermal stores

Which type of centralised instantaneous hot water system is very similar in operation to the thermal store?

• Gas-fired instantaneous

• Gas- or oil-fired combination boilers

• Gas- or oil-fired combined primary storage units

• Thermal stores

What is the purpose of the combustion air fan in a combination boiler?

• To cool the boiler

• To provide air for combustion

• To stop the boiler

• To increase water flow

What type of water does a combination boiler heat up?

• Cold mains water

• Rainwater

• River water

• Sea water

What is the importance of discussing with the client before installing a combination boiler?

• To understand their water usage needs

• To know their favorite color

• To check their electricity bill

• To measure their house size