Exam Question

### (a) Purpose of a Fuel Pump on a Low-Speed, Two-Stroke Engine (6 Marks)
The primary purpose of a fuel pump in a marine low-speed, two-stroke diesel engine is to deliver a precisely metered quantity of fuel at the correct time and at a sufficiently high pressure to the fuel injector. This ensures efficient combustion and optimal engine performance. The key functions are:
1. **Metering (Quantity Control):** The fuel pump accurately measures and delivers the precise amount of fuel required for each combustion cycle, corresponding to the engine's load and speed demands. The quantity is controlled by the engine governor via the fuel rack mechanism.
2. **Timing (Injection Control):** The pump controls the exact moment of injection commencement and termination relative to the crank angle. This is critical for engine performance.