Final answer:
The TGT tapes measure different temperature limits for turbine engines, with the yellow maximum continuous limit line at 793°C. The other markings indicate higher temperatures for limited durations, but specific values for the yellow 30 min. limit line and the red 2.5 min. upper limit line cannot be provided without additional data.
Step-by-step explanation:
The student's question pertains to the temperature indicator markings on Turbine Gas Temperature (TGT) tapes, used in the engineering field, specifically in aerospace engineering. The TGT tapes are designed to indicate different temperature limits for a turbine engine during operation. The question seems to be missing specific temperature values for the yellow 30 min. limit line and the red 2.5 min. upper limit line.
The yellow maximum continuous limit line is marked at 793°C, which likely indicates the safe operational temperature that the turbine can sustain indefinitely without damage. The other colored lines represent progressively higher temperature limits that the turbine can endure only for shorter specified durations. The temperatures that accompany these lines should be filled in based on specific engine manuals or design specifications which will provide accurate data for those limits.
However, without the correct data provided or accessible through the question itself, we cannot accurately fill in the blanks for the yellow 30 min. limit line and the red 2.5 min. upper limit line temperatures.
The complete question is: The TGT tapes range from ____-_______ and are marked with a yellow maximum continuous limit line (793 C), a yellow 30 min. limit line (______C), a yellow 10 minute limit line (879 C), and a red 2.5 min. upper limit line at ______C. is: