cold water 2 revision

1.    Both hard and soft water in the UK can lead to problems. List some of the problems that hard water can have on a plumbing system:

• Increased water pressure
• Unsightly limescale build up, Blockages, Inefficiency in systems, Flow rates.
• Rust build up
• Corrosion of pipes

1.    List two of the problems that soft water can have on a plumbing system:

• Rust and sediment buildup
• Increased water pressure
• Leakage and pipe bursting
• Electrolytic corrosion and pitting

1.    What mineral in temporary hard water creates limescale?

• Calcium carbonate
• Magnesium oxide
• Potassium sulfate
• Sodium chloride

1.    From the local main, a ferrule is attached. What are the purposes of a ferrule?

• None of the above
• Only tapping into the main
• Only point of isolation
• All of the above

1.    After the water undertakers isolator and water meter, the service pipe continues to the property. Between what depth is this laid and why?

• Laid above ground level - to make it easily accessible
• 1,500-2,000mm deep - mainly to protect from rain
• 750–1,350mm deep – mainly to protect from frost.
• 500-700mm deep - mainly to protect from sunlight

1.    After the water undertakers isolator and water meter, the service pipe continues to the property. Between what depth is this laid and why?

• Laid above ground level - to make it easier to access
• 750–1,350mm deep – mainly to protect from frost.
• 500-700mm deep - mainly to protect from sunlight
• 1,500-2,000mm deep - mainly to protect from rain

1.    When the service pipe enters the property through the duct, if it is within 750mm of the outside wall, it must also be:

• Exposed to sunlight
• Painted
• Insulated
• Buried

1.    The blue MDPE pipe changes into a 15mm rising main pipe, commonly made of copper. What items should be installed as soon as reasonably possible on entry to the property?

• Install a sprinkler system
• Install a water softener
• Install a solar panel
• Stop valve and – immediately above it – a drain off valve

1.    Where does the Water Regulations require a drain off valve to be installed?

 

• Immediately above the main stop valve and at any low points in the system.
• At the highest point in the system
• Only at the main stop valve
• At the kitchen sink

1.    The two key tests for a cold water system are:

• Volume and weight
• Temperature and color
• Pressure and flow rate
• Speed and distance