GMJ 6035 central heating 4

What is Delta T

• Weight of the cistern

• The pump speed

• Room temperature divided by boiler temperature

• The difference between the temperature of the radiator and the room

Why is the position of the circulator pump important to produce positive pressure? (Choose 2)

• To avoid air entering

• To prevent positive pressure

• To prevent a negative pressure

• To prevent corrosion

Which of the following can be used to activate a two-port zone valve allowing circuits on either hot water or central heating? (Choose 2)

• Expansion vessel

• Circulator pump

• Room thermostat

• Cylinder thermostat

To correctly balance the system, what should be worked out? (Choose 2)

• How long the system takes to heat up

• How many full turns it takes to heat up

• How many radiators are in the system (plus 1)

• What type of property the customer has

What kind of boiler can you see here?

• system boiler

• conventional boiler

• combination boiler

• thermal store

What component is pictured?

• pump valve

• gate valve

• service valve

• none of the above

Name the component

• expansion vessel

• pump valve

• bypass valve

• circulating pump

Which of the following is NOT a disadvantage of the one pipe gravity system?

• Non-compliant with Building regulation Part L

• Uncontrolled room temperature

• Cheap to install

• Low efficiency boilers

What type of fuel source would be stored in the image here?

• Oil

• Natural gas

• Bio fuel

• Solid fuel

Which of the following reacts to ambient air temperature?

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