Question 329Steam Plants - Assistant Engineer

The correct answer is A) mixing chamber. In a steam assist atomizer, the fuel oil and steam mix entirely within the mixing chamber. The mixing chamber is designed to allow the fuel oil and steam to thoroughly combine before being expelled from the atomizer. This ensures proper atomization of the fuel, which is crucial for efficient combustion. The other answer choices are incorrect because they do not represent the location where the fuel oil and steam mix. The fuel oil swirlers, tangential slots, and whirling chamber are other components of the atomizer, but they do not facilitate the complete mixing of the fuel oil and steam.