A safety valve on an auxiliary boiler...

Question 1 of 270705eccefa0bacbc34ba4d46d6d

A safety valve on an auxiliary boiler simmers constantly and cannot be stopped by several quick blow-offs using the hand-relieving gear. The problem may be __________.

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Question 1 of 27070

A safety valve on an auxiliary boiler simmers constantly and cannot be stopped by several quick blow-offs using the hand-relieving gear. The problem may be __________.

🔍 Key Concepts

• Operation and purpose of a safety valve on an auxiliary boiler • What "simmering" indicates about the tightness of a valve seat • Function of the hand-relieving gear (manual lifting) in clearing minor valve problems

💭 Think About

• Think about which problems can usually be cleared by lifting and snapping the valve open a few times, and which problems would not be fixed by that action. • Ask yourself: if the valve keeps leaking (simmering) even after several deliberate blow-offs, what does that suggest about the physical condition of the seating surfaces? • Consider which choices would cause a temporary leak versus a persistent leak that cannot be cleared.

✅ Before You Answer

• Verify which fault would normally be removed by using the hand-relieving gear (e.g., loose dirt vs. physical damage). • Check which options would most directly prevent the valve disc from making a tight, uniform contact with the seat. • Eliminate any options that would more likely affect other parts of the system (like drainage or spring protection) rather than the actual sealing between disc and seat.