3 way valve

Selective space heating in a dwelling can be described as the heating of

• all rooms to a comfortable design temperature

• all rooms to a low background temperature

• one room to a comfortable design temperature

• some rooms in a dwelling as needed by the occupier

What type of heating system is shown in the following diagram?

• Gravity heating with mid-position valve

• Pumped heating with 2x two-port valves

• Pumped heating only

• Gravity heating only

What type of heating system is shown in the following diagram?

• Open-vented heating-only system

• Sealed heating-only system

• Open-vented fully pumped system

• Sealed semi-gravity system.

Which one of the following will be included in an open-vented heating system?

• Pressure-reducing valve

• Expansion vessel

• Filling loop

• Feed and expansion cistern.

Which one of the following components can be used in a mini-bore heating system to distribute circulated water through the main primary flow and return pipework from a central point to individual radiators?

• Hopper head

• Distributor head

• Manifold

• Injector tee.

A solid-fuel heating appliance in which combustion takes place in an enclosed glass-fronted chamber is called .??...... note this version is from the 1970s and also has a back boiler to provide domestic hot water and heating..extremely efficient but expensive to run unless you had free coal

• an open fire

• a room heater

• an independent boiler

• a cooker.

The oil in a pressure-jet burner is forced through which one of the following components during the combustion process?

• A nozzle

• A venturi

• An injector tee

• A jet stream

Which one of the following describes a type of gas-fired boiler that takes its air for combustion direct from the outside air?

• Open-flued

• Room-sealed

• Conventional flued

• Back boiler

What type of heat emitter is shown in the following photograph?

• Panel radiator

• Column radiator

• Kick-space radiator

• Low surface temperature radiator

Unwanted (reverse) circulation in central heating pipework can be controlled by installing which one of the following?

• A non-return valve

• A room thermostat

• An injector tee

• A pressure-relief valve