Exam Question

### (a) Main Engine Ancillary Equipment for Automatic Fuel Viscosity Control
The system for automatic monitoring and regulation of fuel viscosity, commonly known as a Viscotherm or Viscosity Control Unit, is an essential part of the main engine fuel oil supply system. It ensures that heavy fuel oil (HFO) is delivered to the fuel injectors at the optimum viscosity for efficient atomization and combustion.
**Main Components:**
1. **Fuel Oil Supply Pump (Booster Pump):** Draws fuel from the mixing column/service tank and pressurizes it for delivery to the engine's fuel pumps.