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← ScienceWhich outcome results when a Stirling engine operates with an inadequate cooling water flow rate?
A)Reduced power output and efficiency✓
B)Increased engine vibration and noise
C)Premature wear of the crankshaft bearings
D)Over-pressurization within the expansion space
💡 Explanation
When cooling water flow is inadequate, ineffective heat rejection occurs because heat cannot be transferred, leading to a lower temperature differential between the hot and cold reservoirs, thereby reducing efficiency and power output. Therefore, lower power and efficiency result, rather than vibration, bearing wear, or over-pressurization which depend on mechanical failures or excessive heat input.
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