TOT stands for which engine parameter?

• A. Turbine Outlet Temperature
• B. Total Operating Time
• C. Turbine Operating Time
• D. Thermal Output Temperature

Answer: (A)

TOT refers to the temperature of the gas as it leaves the turbine. This Turbine Outlet Temperature is a key measurement in engine operation because it shows how hot the gas is after expanding through the turbine, which affects turbine blade cooling needs, efficiency, and safety limits. The acronym TOT is specifically used to denote this turbine outlet temperature, making it the correct interpretation.

The other options describe time-related concepts or a nonstandard term, which aren’t used as a temperature parameter in engines. Total Operating Time and Turbine Operating Time are about durations, not temperatures, while Thermal Output Temperature isn’t a standard engine metric.