Plumbing level 2 - PP3- Common processes

What type of solder must be used on hot and cold water systems?

• Lead solder

• Paraffin-based solder

• Lead-free solder

• Acid-based solder

What is the composition of lead-free solder?

• 70% lead + 30% tin

• 99% tin + 1% copper

• 50% lead + 50% tin

• 90% tin + 10% copper

What type of flux does not require cleaning of pipes before soldering?

• Lead-free flux

• Active flux

• Non-active flux

• Paraffin-based flux

What creates the watertight seal in push fit fittings?

• Olive

• Compression ring

• O ring

• Solder

What is a characteristic of Type B compression fittings?

• Suitable for half hard copper and plastic pressure pipe

• Require the end of the pipe to be manipulated using a swaging tool

• Use an olive and are tightened using an adjustable spanner

• Require nothing more than the piece of pipe to be cut square

What does dezincification in brass fittings result in?

• Rust

• A black tarnish

• A white powder coating

• A green patina

What is used to create a watertight seal in LCS threaded fittings?

• Olive

• Compression ring

• PTFE or hemp and paste

• O ring

What type of fittings are used on ABS and uPVC waste or soil pipes?

• Compression fittings

• Push fit fittings

• Fusion weld fittings

• Solvent weld fittings

What is a hazard associated with soldering?

• Burns to person

• Dezincification

• Pipe bursting

• Water contamination

What should be used to ensure all metallic pipes are earthed?

• Silicon gel

• Compression fittings

• Equipotential bonding

• PTFE tape