Question 35 3AE01 - Third Assistant Engineer

The Correct Answer is B **Why option B ("Pressurized tank") is correct:** In an air starting system (often used for large diesel engines or turbines), the energy required to initially turn the engine is stored as highly compressed air. This compressed air is generated by a compressor and then held in a specialized, robust container designed to withstand high pressure. This container is commonly referred to as an air receiver or, more generically, a **pressurized tank** (or reservoir). The air remains stored in this tank until it is needed for engine starting. **Why the other options are incorrect:** * **A) Air compressor:** The air compressor is the device that *produces* the compressed air, but it does not *store* the working air charge. Its function is to intake atmospheric air and increase its pressure before sending it to the storage tank. * **C) Distributor assembly:** The distributor assembly (or starting air distributor) is a control component that manages the sequence and timing of when the compressed air is directed to the individual cylinders during the starting process. It controls the flow but does not store the main air charge. * **D) Cylinder check valve:** The cylinder check valve is a safety and functional component located on the cylinder head. Its purpose is to allow the high-pressure starting air into the cylinder while preventing the high-pressure combustion gases from flowing back into the starting air system (or line). It is a flow control and safety device, not a storage vessel.