9189PH2CHPPT7

What is a two-port motorised valve commonly known as?

• Zone valve

• Pressure valve

• Flow valve

• Check valve

A two-port motorised valve allows hot water and the heating circuits to be controlled ______.

• together

• separately

• manually

• automatically

What are the available connection sizes for a two-port motorised valve?

• 15mm and 22mm

• 22mm and 28mm

• 28mm and 35mm

• 35mm and 42mm

The two-port motorised valve is commonly used in ___ systems.

• A) X and Y

• B) S and C

• C) A and B

• D) M and N

What is the function of a three-port mid-position valve?

• Controls the flow of water to heating circuits only

• Controls the flow of water to hot water circuits only

• Controls the flow of water to both heating and hot water circuits

• Controls the flow of water to the boiler only.

Fill in the blank: In a three-port mid-position valve, the port labeled 'A' is for ______.

• flow for the boiler

• central heating

• hot water

What happens in the mid-position of a three-port mid-position valve?

• Water circulates around both heating A and hot water B circuits

• Water circulates only around heating A circuit

• Water circulates only around hot water B circuit

• Water does not circulate at all.

In the 'Heating Only' position of a three-port mid-position valve, the ball shuts off port ____.

• A) A

• B) B

• C) AB

• D) None

What is the primary function of an expansion vessel in a sealed system?

• To heat water

• To replace the F&E cistern and allow safe expansion of water

• To cool water

• To filter water

An expansion vessel is normally installed on the return because the return is around ___ cooler than the flow.

• 10°C

• 15°C

• 20°C

• 25°C