Which statement is a valid interpretation of the listed limits?

• A. ITT ground start limit is 815
• B. APR power limit is 5 minutes
• C. Normal two-engine limit is 10 minutes
• D. Cold soaked is -25c for 8 hours

Answer: (A)

Limits on equipment or procedures are usually given as a maximum value for a specific parameter with its units. The statement that the ITT ground start limit is 815 is the best interpretation because ITT (Interstage Turbine Temperature) is a temperature measurement, and a maximum limit is commonly written as a numeric value with degrees (C). So 815 means 815 degrees Celsius for the ITT during a ground start, which is a straightforward, unambiguous limit.

The other options mix time durations with different concepts or describe environmental conditions in ways that aren’t standard single limits. For example, a power limit described in minutes doesn’t pin down a specific parameter, a two-engine limit given as minutes lacks a defined measurement, and a cold soak condition stated as a temperature for a duration describes an environmental test condition rather than a direct operational limit for a start or power setting.