Question 2

The Correct Answer is B **Why Option B ("Pressurized tank") is correct:** In an air starting system (often used for large engines like diesels or gas turbines), the energy required to initially turn the engine over comes from highly compressed air. This compressed air is generated by a compressor and then held in a **pressurized storage tank** (often called a receiver or air reservoir). The tank's primary function is to store a sufficient volume of air at the required pressure until the starting sequence is initiated. **Why the other options are incorrect:** * **A) Air compressor:** The air compressor's function is to *generate* and increase the pressure of the air, not to store the main working charge for starting the engine. While it handles the air, it is not the storage vessel itself. * **C) Distributor assembly:** The distributor assembly's function is to route the high-pressure air sequentially to the correct engine cylinders at the right time during the starting process (timing), not to store the bulk air charge. * **D) Cylinder check valve:** The cylinder check valve is a safety and directional component that ensures air flows *into* the engine cylinder during starting, and prevents hot combustion gases from flowing back *into* the starting system manifold. It is a control valve, not a storage location.