The maximum ITT temperature for continuous operation is:

• A. 680 degrees C
• B. 600 degrees C
• C. 700 degrees C
• D. 720 degrees C

Answer: (A)

Understanding the limit you’re dealing with here: ITT is the turbine inlet temperature, and the engine is designed to tolerate a certain temperature continuously. That sustained limit is lower to protect turbine blades from thermal stress and to extend engine life. Higher temperatures are permitted only for short, approved bursts during operations like takeoff or rapid acceleration, not for long periods.

For this system, the sustained ITT limit is 680 degrees C. That’s the maximum you can hold during continuous operation without risk. The other temperatures listed—while they might be reached for brief periods under specific procedures—are not allowed to be maintained continuously. A temperature of 600 degrees C is below the continuous limit and would merely represent a lower operating point, not the maximum allowable for endless operation.