What are the possible types of abnormal start?

The correct answer identifies the types of abnormal starts that can occur in an aircraft engine, specifically in the context of turbofan or turboprop engines. A hot start refers to a situation where the engine exceeds the permissible temperature limits during the starting process, which can cause damage if not addressed quickly. A hung start occurs when the engine fails to accelerate to the proper RPM (revolutions per minute) during start-up, typically indicating that it is not producing enough thrust while still showing signs of fuel combustion. Lastly, a no start situation occurs when the engine does not start at all, meaning there is no increase in RPM or indications that combustion has commenced.

Understanding these terms is critical for pilots and maintenance personnel, as each type of abnormal start requires specific corrective actions and has significant implications for safety and engine longevity. The other options include terms that either do not accurately reflect common engine start anomalies or describe operational conditions unrelated to engine starting processes. By recognizing these abnormal start types, individuals can diagnose and respond appropriately to engine performance issues.