Which risk increases when piston ring sticking occurs in heavy machinery?

💡 Explanation

Increased blow-by and oil consumption results because piston ring sticking prevents proper sealing, enabling combustion gases to leak past into the crankcase. The mechanism is loss of seal. Therefore, blow-by increases, rather than decreasing cylinder pressure and causing thermal inefficiencies.

• Which risk increases when thermal expansion coefficients mismatch in heat exchanger?
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