Question 441Motor Plants - Assistant Engineer

The correct answer is B) Increased exhaust valve wear. The reasoning behind this is that heavy fuel oils with ash content exceeding 0.1% by weight can lead to increased exhaust valve wear. This is because the higher ash content can lead to abrasive wear on the exhaust valves, causing them to wear out more quickly. The increased ash content can also contribute to the formation of deposits on the valves, further accelerating their wear. The other options are incorrect because: A) Glazing of the cylinder liners is not directly related to increased ash content in the fuel. C) Excessive bearing wear is more commonly associated with factors like poor lubrication or improper engine operation. D) Increased MEP (Mean Effective Pressure) is not a direct consequence of higher ash content in the fuel.