During start, at what EGT value should the start be aborted?

During start, at what EGT value should the start be aborted?

• A. 845 C
• B. 825 C
• C. 865 C
• D. 855 C

Answer: (A)

During a turbine start, Exhaust Gas Temperature is watched to判断 whether light‑off is successful and the engine is starting safely. There is an abort limit set for EGT: if the temperature climbs to that value and continues rising or fails to stabilize as the engine attempts to light off, you must stop the start. This limit is chosen to allow normal, short transient spikes that happen as ignition begins, but it’s low enough to prevent damage if the combustor doesn’t light or if abnormal combustion occurs. The correct value is the one that best balances letting a normal light‑off occur with protecting the engine from overheating. The other options would cause either unnecessary interruptions or insufficient protection against a dangerous start condition.

During a turbine start, Exhaust Gas Temperature is watched to判断 whether light‑off is successful and the engine is starting safely. There is an abort limit set for EGT: if the temperature climbs to that value and continues rising or fails to stabilize as the engine attempts to light off, you must stop the start. This limit is chosen to allow normal, short transient spikes that happen as ignition begins, but it’s low enough to prevent damage if the combustor doesn’t light or if abnormal combustion occurs. The correct value is the one that best balances letting a normal light‑off occur with protecting the engine from overheating. The other options would cause either unnecessary interruptions or insufficient protection against a dangerous start condition.