When starting a turbine engine, a hot start is indicated by

When starting a turbine engine, a hot start is indicated by

• A. The engine reaching idle RPM
• B. The exhaust gas temperature being well below limit
• C. The engine surging at start
• D. The exhaust gas temperature exceeds specified limit

Answer: (D)

A hot start means the engine’s combustor is overheated during startup, shown by the exhaust gas temperature rising above the specified limit. This excessive EGT signals that conditions inside the combustor are too hot, often due to excessive fuel or timing issues, and poses a risk of damage, so the start is aborted or fuel is cut off to prevent overheating. The other indicators aren’t signs of a hot start: reaching idle RPM is just a normal milestone of a successful start, an exhaust temperature well below the limit indicates the opposite, and surging points to compressor instability rather than a overheating condition.

A hot start means the engine’s combustor is overheated during startup, shown by the exhaust gas temperature rising above the specified limit. This excessive EGT signals that conditions inside the combustor are too hot, often due to excessive fuel or timing issues, and poses a risk of damage, so the start is aborted or fuel is cut off to prevent overheating. The other indicators aren’t signs of a hot start: reaching idle RPM is just a normal milestone of a successful start, an exhaust temperature well below the limit indicates the opposite, and surging points to compressor instability rather than a overheating condition.