Plumbing level 2 - PP 3.2 - Central Heating

What is the purpose of the plastic inserts in radiator brackets?

• To stop metal rubbing against metal

• To increase the weight

• To enhance the appearance

• To make installation easier

What tool is recommended for measuring the distance from the bottom of the bracket to the bottom of the radiator?

• Measuring tape

• Protractor

• Set square

• Ruler

How far up from the finished floor height should you measure to mark a small horizontal line?

• 150mm

• 200mm

• 100mm

• 250mm

What size masonry drill bit is commonly used for hanging a radiator?

• 5mm

• 8mm

• 7mm

• 6mm

What should be used to tighten the valve stems in place?

• Screwdriver

• Pliers

• Valve key

• Wrench

What is the purpose of bleeding a radiator?

• To reduce noise

• To increase water flow

• To clean the radiator

• To release trapped air or hydrogen

What should be done before locating the bleed valve on the radiator?

• Remove the radiator

• Increase the water pressure

• Turn off the central heating system

• Turn on the central heating system

What should be used to protect the area when bleeding a radiator?

• Plastic sheet

• Dust sheet or absorbent cloth

• Newspaper

• Cardboard

What should be done if the radiator is attached to a sealed system and water is released?

• Increase the system pressure

• Replace the radiator

• Re-pressurise the boiler

• Turn off the water supply

What is the purpose of cold flushing a system?

• To clean the radiator

• To reduce water pressure

• To increase water temperature

• To remove excess flux, wire wool, or loose solder