Question 406 Deck General

The correct answer is A) kerosene. Kerosene is classified as a Grade D product under the US Coast Guard regulations for fuel types. Grade D products are considered lower quality and have higher allowable limits for certain impurities compared to higher grade fuels like aviation gasoline or commercial gasoline. Kerosene typically has a higher sulfur content and lower energy density than these higher grade fuels, which is why it is categorized as a Grade D product. The other answer choices are incorrect because heavy fuel oil (B) and aviation gasoline (C) are higher grade products, while commercial gasoline (D) is a different fuel type that is also not considered a Grade D product by the Coast Guard standards.