Exam Question
(a) Sketch and explain the operation of the Quick Closing Valve? (10)
(b) What do you understand by the Emergency Shutdown System? Explain the operation in an emergency. (10)
Class 4 (4th Engineer)
SSEP
📅 Dec 2024
Reference Answer
(a) **Quick Closing Valve (QCV)**
**1. Purpose and Function:**
A Quick Closing Valve (QCV) is a critical safety device designed to rapidly cut off the flow of flammable liquids (primarily fuel oil and lubricating oil) from storage or service tanks to machinery in the event of an emergency, such as a fire or a significant oil leak. Its primary function is to prevent the escalation of a hazardous situation by isolating the fuel source, thereby minimizing the risk of fire spread, environmental pollution, and machinery damage. The closing action must be immediate, typically within 1 to 2 seconds.
**2. Construction:**
**1. Purpose and Function:**
A Quick Closing Valve (QCV) is a critical safety device designed to rapidly cut off the flow of flammable liquids (primarily fuel oil and lubricating oil) from storage or service tanks to machinery in the event of an emergency, such as a fire or a significant oil leak. Its primary function is to prevent the escalation of a hazardous situation by isolating the fuel source, thereby minimizing the risk of fire spread, environmental pollution, and machinery damage. The closing action must be immediate, typically within 1 to 2 seconds.
**2. Construction:**
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