PP 13 Central Heating System Quiz

Which document must be consulted for correct commissioning procedures?

• Domestic Building Services Compliance Guide

• Water Supply (water fittings) Regulations 1999

• British Standard BS EN 14336

• Building Regulations Approved Document L1A

What is the most important document to consult when identifying faults with hot water systems?

• British Standard BS EN 12831

• Building Regulations Approved Document L1B

• Manufacturer's instructions

• Domestic Building Services Compliance Guide

What is the likely cause of a radiator being cold at the top but working once the air has been bled?

• Pump failure

• Inhibitor blockage

• Galvanic corrosion

• Hydrogen filling

What is the likely cause of lukewarm radiators and cold upstairs in a semi-gravity system?

• Hydrogen filling

• Inhibitor blockage

• Pump failure

• Galvanic corrosion

What is the likely cause of a noisy boiler when the water begins to reach temperature?

• Galvanic corrosion

• Calcium deposits

• Kettling

• Black oxide sludge

What is a routine maintenance task for central heating systems?

• Power flushing

• Checking pressure charge in expansion vessels

• Replacing radiator valves

• Boiler replacement

In which situation is draining of the system required?

• Routine maintenance

• Boiler servicing

• Power flushing

• Replacing motorised valves

What is the initial system fill conducted at?

• Variable pressure

• Normal operating pressure

• High pressure

• Low pressure

Where must the primary vent terminate due to the chemical content of primaries?

• Over the radiator

• Over the hot water storage cylinder

• Over the F&E cistern

• Over the boiler

What does the inhibitor do in a central heating system?

• Prevents scale and corrosion

• Prevents kettling

• Prevents galvanic corrosion

• Prevents hydrogen filling