Which outcome occurs when piston rings experience blow-by?

💡 Explanation

Increased blow-by allows combustion gases to leak past the piston rings, impacting the cylinder pressure via gas leakage because sealing is compromised; therefore, compression decreases rather than improves, and emissions rise because unburnt fuel escapes.

• Which risk increases during high-speed internal diameter (ID) grinding of hardened steel bearing races?
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• Which risk increases when a cold engine is rapidly accelerated before oil reaches optimal operating viscosity?
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