Final answer:
APR Power usually stands for Automatic Performance Reserve and refers to the extra power an engine can generate, often in jet engines during critical situations. The limits of APR Power are determined by safety margins and engine design capabilities to prevent damage due to excessive wear and heat.
Step-by-step explanation:
The question 'write answer in 500 words APR power 1 eng is limited to ________?' seems to refer to the term 'APR Power', which usually stands for Automatic Performance Reserve or Available Power Ratio in the context of engineering, specifically in aerospace or mechanical engineering. However, without additional context, it's difficult to provide a specific limit as it could refer to different engineering constraints or specifications. The term APR in engineering could relate to the extra power that an engine can generate under specific conditions, such as during an emergency or surge demand. The limit of this reserve power is typically pre-determined based on the design and performance capabilities of the engine.
For example, in the case of jet engines, the APR might be the additional thrust that can be temporarily provided by the engines during critical flight situations like takeoff or in the event of an engine failure. This reserve power is intentionally limited to prevent damage to the engine due to excessive wear or heat. Manufacturers set this limit based on stringent testing and safety margins.
It is important for students in engineering disciplines to understand how performance limits like APR are calculated and the factors that influence these limits. Usually, these would include maximum safe operating temperatures, structural integrity limits, and other related performance parameters.