Class 4 (4th Engineer) MEKG 📅 Dec 2023

Exam Question

(a) What are the Safety Devices fitted to an Air Compressor? (4)

(b) What is the Purpose of the Scum Valve on a Boiler? (4)

(d) Regarding the Emergency Bilge Injection Valve, what is its relevant size compared to the Main Sea Water Injection Valve? (4)

Reference Answer

### (a) Safety Devices fitted to an Air Compressor (4 Marks)
Air compressors are equipped with a range of safety devices to ensure safe operation, prevent damage to machinery, and protect personnel. These devices are critical for mitigating risks associated with high pressures, temperatures, and moving parts.
* **Pressure Relief Valves (Safety Valves)**:
* **Purpose**: These spring-loaded valves are designed to automatically open and relieve excess pressure within the compressor stages, intercoolers, aftercoolers, and the air receiver if the system pressure exceeds a predetermined safe operating limit.

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