What is a hot section in a gas turbine and why is its inspection critical?

• A. The hot section is the exhaust nozzle only and is not inspected for structural integrity.
• B. The hot section includes the compressor and is inspected for balancing.
• C. The hot section refers to the turbine casing only and is tested for leakage.
• D. The hot section comprises the combustor and high-temperature turbine components that operate at extreme temperatures; inspection is critical due to creep, oxidation, and risk of failure.

Answer: (D)