Which of the following is a type of domestic hot water system?

• Combi boiler

• Solar panel

• Wind turbine

• Geothermal pump

A _______ is a type of domestic hot water system that combines heating and hot water in one unit.

• Combi boiler

• Solar panel

• Wind turbine

• Geothermal pump

What is required for all immersion heaters installed today?

• A) A reset button or cut-out device

• B) A thermostat

• C) A power switch

• D) A temperature gauge.

Domestic immersion heaters are rated at ___ kW.

• 1

• 2

• 3

• 4

What are the components joined together in an open vented combination unit?

• A) Cylinder and cold water storage cistern

• B) Cylinder and hot water tank

• C) Cold water storage cistern and hot water tank

• D) Mains feed and distribution pipe.

Open vented combination units are sometimes found in ______.

• Houses

• Flats

• Offices

• Schools

Which component in the DHW system is responsible for storing water?

• Open vent

• Storage cistern

• DHW cylinder

• Coil type heat exchanger

The ________ is used to transfer heat in the DHW system.

• Storage cistern

• DHW cylinder

• Coil type heat exchanger

• Primary flow

What is the purpose of the component labeled at the top of the water heater?

• Pressure relief valve

• Thermostat

• Heating element

• Insulation

The component labeled at the bottom of the water heater is used to regulate the temperature. It is called a ________.

• Pressure relief valve

• Thermostat

• Heating element

• Insulation