Heating presentation 2

Multiple Choice

Which of the following statements best describes a pumped central heating system?

• It relies solely on gravity for heat circulation.

• It uses a circulator or pump for forced circulation.

• It is no longer installed in modern properties.

• It only heats water, not air.

Open Ended

Why is understanding the principles of central heating systems important for plumbing professionals?

Multiple Choice

What is one main disadvantage of the one-pipe semi-gravity system in plumbing?

• Each radiator is progressively cooler than the previous

• It is expensive to install

• It requires multiple ring pipes

• It allows for controlled room temperature

Open Ended

Explain how the flow of water in a one-pipe semi-gravity system affects the temperature of each radiator in the circuit.

Multiple Select

Which of the following are advantages and disadvantages of the one-pipe semi-gravity system?

• Cheap to install

• Each radiator is progressively cooler than the previous

• Uncontrolled room temperature

• Compliant with Building Regulations part L

Fill in the Blanks

The primary function of the open vent pipe is to provide a safety

should the system overheat.

Multiple Choice

Why should the open (ended) vent pipe rise to a minimum of 450mm above the water level of the feed & expansion cistern?

• To prevent pumping over

• To increase system pressure

• To reduce installation cost

• To improve water flow speed

Multiple Choice

What is the maximum recommended distance between the open vent and the cold feed on the flow from the boiler in a one-pipe semi-gravity system?

• 150mm

• 450mm

• 22mm

• 28mm

Multiple Choice

Which pipe in a one-pipe semi-gravity system allows expansion in the system water to reach the F&E cistern?

• 15mm cold feed pipe

• 22mm vent pipe

• 28mm primary flow

• 28mm primary return

Multiple Select

Which of the following are functions of the F&E cistern in a one-pipe semi-gravity system?

• Provide static head for the heating system

• Allow expansion in the system water

• Keep the system topped up after slight water loss

• Control the temperature of the boiler

Fill in the Blanks

The F&E cistern is installed to provide static head for the heating system, keep the system topped up after slight water loss, and

.

Open Ended

Describe the difference between gravity circulation and pumped circulation in a two-pipe semi-gravity system.

Multiple Choice

Which of the following is an advantage of the two-pipe semi-gravity system?

• All heat emitters reach the same temperature

• Uncontrolled heat

• Boiler cycling

• Low efficiency

Open Ended

Reflecting on today's lesson about central heating system principles, what questions do you still have or what would you like to know more about regarding gravity and pumped systems?

Multiple Choice

What is the main difference between gravity circulation and pumped systems in central heating?

• Gravity circulation uses convection, while pumped systems use a circulator or pump.

• Gravity circulation is faster than pumped systems.

• Pumped systems do not use any form of circulation.

• Gravity circulation is used in all modern systems.

Open Ended

Any questions?