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Class 4 (4th Engineer) MEKM 📅 Jan 2023

Exam Question

(a) Sketch a block diagram showing a bridge control system for propeller pitch, engine speed and load. (8)

(b) Describe the operation of the system sketched in (a). (4)

(c) What are the requirements to be fulfilled on an UMS classed vessel for operating "unmanned Engine Room watch." (4)

Exam question diagram

Reference Answer

### (a) Block Diagram of a Bridge Control System for CPP and Engine
A block diagram is required to illustrate the integrated control system for a Controllable Pitch Propeller (CPP) and the main engine, managed from the bridge. The diagram should clearly show the signal flow from the operator's command to the final actuators, including essential feedback loops and safety overrides.
**Key components to be included in the diagram:**
1. **Bridge Control Lever**: Single lever input for combined pitch and speed command.

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