Question 91Motor Plants - Assistant Engineer

The correct answer is B) improved atomization. Maintaining the proper fuel oil temperature is crucial for ensuring efficient combustion in a diesel engine. Proper fuel atomization is essential for complete and efficient burning of the fuel. Increasing the fuel temperature improves the fuel's atomization, resulting in a better air-fuel mixture and more complete combustion. This leads to improved engine performance and efficiency. The other answer choices are incorrect because they do not directly relate to the effects of maintaining proper fuel oil temperature. Valve wear, cylinder blow-by, and cylinder mean effective pressure are not directly impacted by fuel oil temperature in the same way as fuel atomization.