Which type of fuel can boilers use?

Boilers are designed to operate using a variety of fuel types, and option B accurately reflects this diversity. This includes gas, oil, coal, electricity, and biomass, which are all recognized as viable fuels for boiler systems.

Gas boilers are popular due to their efficiency and ease of use, while oil boilers are commonly found in areas where natural gas is not available. Coal boilers may be used in industrial applications where a cost-effective and abundant fuel is needed. Electric boilers offer the advantage of not emitting pollutants, making them suitable for environments where air quality is a concern. Biomass, which includes organic materials like wood pellets or agricultural residues, represents a renewable energy source that can be utilized in modern boiler systems.

This flexibility in fuel options allows for the use of different energy sources depending on availability, cost, environmental impact, and specific heating requirements, making this response comprehensive and relevant to multiple applications in the field of boiler operation. Other options mentioned, such as wood only or solar energy, do not encompass the broader range of fuels that modern boilers are capable of using, thereby limiting their applicability in various operational contexts.