Mini Multiple Choice Test: Condensing Boiler Efficiency

What is the primary mechanism by which a condensing boiler increases efficiency compared to a conventional boiler?

• It uses a larger heat exchanger.

• It burns fuel at a higher temperature.

• It recovers heat from exhaust gases through condensation.

• It uses a different type of fuel.

At what temperature does water vapor in the exhaust gases of a condensing boiler typically condense?

• Above 100°C

• Around 50-60°C

• Below 0°C

• Around 80-90°C

Which of the following factors significantly affects the efficiency of a condensing boiler?

• The outside air temperature

• The boiler's water flow rate

• The amount of sunshine

• The presence of scale or dirt inside the boiler

Operating a condensing boiler above its maximum efficient operating temperature will likely result in:

• Increased efficiency

• Reduced efficiency and potential damage

• No change in efficiency

• A higher water pressure

Regular maintenance of a condensing boiler is important for:

• Keeping the warranty valid.

• Maintaining optimal efficiency and preventing damage.

• Reducing the cost of fuel.

• All of the above

Which of the following is the MOST effective method for removing existing scale and corrosion from a central heating system?

• Leaving the existing water in the radiators

• Using a chemical cleaner specifically designed for central heating systems

• Flushing the system with clean water

• Both b and c

What is the purpose of adding a corrosion inhibitor to the central heating system water?

• To increase water pressure

• To prevent the build-up of scale

• To protect metal components from rust and corrosion

• To soften hard water

Which of the following contributes to the formation of sludge in a central heating system?

• Clean, filtered water

• Corrosion of metal components

• Regular chemical cleaning

• High water pressure

What helps a boiler maintain efficiency and last longer?

• Regular maintenance

• Increasing pressure

• Ignoring minor leaks

• Using hard water

What helps a boiler maintain efficiency and last longer?

• Clean water treated with inhibitor

• A Magnetic System Filter

• A Scale Reducer

• All of the above