What is one of the major disadvantages of a gas turbine?

The high cost of manufacturing a gas turbine is indeed one of its significant disadvantages. The components of a gas turbine, such as the turbine blades and combustor, are often made from specialized materials that can withstand extreme temperatures and pressures. This requires advanced engineering, precision manufacturing techniques, and high-quality materials, resulting in a high initial investment. Additionally, the complexity of gas turbine systems can lead to increased costs for maintenance and operational support.

While other options, like low noise pollution and high thermal efficiency, do not highlight disadvantages, the statement that gas turbines can operate without auxiliaries suggests a potential benefit rather than a disadvantage. In practice, while gas turbines can function with minimal support, they still typically require auxiliary systems for optimal performance, safety, and maintenance, such as cooling and lubrication systems.