central heating #001

The grade of copper used in microbore central heating systems is:

• R250

• R290

• R220

• R230

A half hard straight length of copper is:

• R290

• R250

• R220

• R200

The diameters of small bore pipework are:

• 8 and 10mm

• 15 and 22mm

• 28 and 35mm

• below 42mm

What type of valve can you see here?

• 2 port zone valve

• mid position valve

• by pass valve

• pump

Which valve can you see here?

• mid position

• by pass

• wiring centre

• 2 port zone valve

What does this component do?

• controls the hot water temperature

• controls the room temperature

• controls the boiler

• none of the above

What type of system is this?

• C plan

• Y plan

• S plan plus

• S plan

What does this component do?

• Joins all the CH components together

• Stores the mcb's

• Connects the boiler to the timeclock

• None of the above

Name the component

• pump valve

• bypass valve

• automatic air vent

• expansion vessel

Name the component

• expansion vessel

• pump valve

• bypass valve

• circulating pump