Question 86Motor Plants - 1st Asst/Chief

A) Increased exhaust valve wear is the correct answer. Heavy fuel oils with ash content above 0.1% by weight can lead to increased exhaust valve wear. The ash content in the fuel can cause abrasive wear on the exhaust valves, leading to faster deterioration and requiring more frequent valve replacements. This is due to the ash particles acting as an abrasive on the valve surfaces during combustion. The other options are incorrect because: B) Increased MEP (mean effective pressure) is not a direct consequence of higher ash content. C) Excessive bearing wear is not a typical issue caused by increased ash in heavy fuel oils. D) Glazing of the cylinder liners is not a common problem related to elevated ash levels in the fuel.