GMJ 9189 Phase 2 Central Heating MCQ

Installing an air separator allows which one of the following to take place?

• Close coupling of the cold feed and vent connections

• Close coupling of the flow and return connections

• Close coupling of the pump and the vent connections

• Close coupling of the motorised valve connections

Which one of the following Building Regulations discusses the control of heating systems within new-build dwellings?

• Part L1a

• Part L1b

• Part L2a

• Part L2b

Condensing boilers are specifically designed to…

• Provide stored hot water

• Extract less heat from the flue gases

• Extract more heat from the flue gases

• Provide hot water at low temperatures

A district heating system is feeding a number of high-rise flats. Hydraulic separation is required - how is this achieved within each flat?

• Heat recovery unit

• Ground source heat pump

• Heat interface unit

• Air source heat pump

A thermostatic radiator valve opens and closes as a result of the temperature of the…

• Primary circuit

• Boiler

• Space it's installed in

• Return pipework

By which one of the following processes do radiators give out 70% of their heat?

• Conduction

• Convection

• Radiation

• Emission

Which one of the following describes the purpose of background heating?

• Heat the property quicker than full central heating

• Heat only certain rooms in the property, as required

• Heat the property to a lower temperature than full central heating

• Heat the property to a higher temperature than full central heating

Which one of the following is the best installation position for a cylinder thermostat?

• ¼ down from the top of the cylinder

• ⅓ down from the top of the cylinder

• ¼ up from the bottom of the cylinder

• ⅓ up from the bottom of the cylinder

Which port is the central heating flow connected to on a mid-position valve?

• A

• B

• AB

• BA

Identify the type of heating system shown in the image below.

• Open vented S-plan system

• Sealed S-plan system

• Open vented Y-plan system

• Sealed Y-plan system