What is the safety control on a Gravity fed system ?, F & E tank, Open vent, Room stat, Cylinder stat, What activates a TRV ?, Water temperature, Room stat, Air temperature, Boiler, Who is the end user ?, Customer, Installer, Engineer, British Gas, Which Approved Document states when the installation of a 'C' plan is required for a Domestic Property ?, A, M, H, L, What is the aim of a Central Heating System ?, Stop cold spots, Heat the hot water, Thermal comfort, Stop damp, A Central Heating Bypass is installed after the circulating pump and before any valve ?, True, False

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