Question 90Motor Plants - 1st Asst/Chief

The correct answer is C) Yes, high sulfur content decreases calorific value of fuel. The sulfur content of heavy fuel oil can affect the fuel rate of a diesel engine because sulfur has a lower calorific or energy value compared to the other hydrocarbon components of the fuel. Higher sulfur content results in a lower overall energy content or calorific value of the fuel. This means more fuel needs to be burned to produce the same amount of power, increasing the fuel consumption rate of the engine. The other answer choices are incorrect because: A) While high sulfur can lead to acid corrosion, it does not directly affect the fuel rate. B) Increased wear from high sulfur is a secondary effect, the primary impact is on the calorific value. D) The sulfur content does affect the efficiency of combustion by reducing the overall energy content of the fuel.