Class 4 (4th Engineer) MEKG 📅 Aug 2024

Exam Question

(a) With a line diagram, explain the working of the Quick Closing valve? (8)

(b) Why do you need the Quick closing valves on the fuel and lube oil lines? (3)

(c) Explain how to reset the valve after a trial. How is the periodie test carried out and what are the areas of concern that need special attention. (5)

Reference Answer

### (a) Working Principle of a Quick Closing Valve
A Quick Closing Valve (QCV) is a critical safety device mandated by SOLAS, designed for the rapid, remote shutdown of flammable liquid supply from tanks in the event of an emergency, such as a fire. It is typically a spring-loaded, fail-safe valve held open against the spring force by a tripping mechanism, which is released by pneumatic, hydraulic, or electrical means from a safe location outside the machinery space.
**1. Construction:**
* **Valve Body:** Usually of globe or angle type, providing a positive shut-off.

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