If a water-tube boiler tube has sagged and...

If a water-tube boiler tube has sagged and...

Question 1 of 270705eccefa0bacbc34ba4d46ca8

If a water-tube boiler tube has sagged and must be plugged, a hole must be made in the tube wall to prevent __________.

Question 1 of 27070

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Q

If a water-tube boiler tube has sagged and must be plugged, a hole must be made in the tube wall to prevent __________.

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🔍 Key Concepts

• Water-tube boiler construction and what happens when a tube sags • What occurs to water or steam trapped in a closed tube when the boiler is fired • Why engineers sometimes drill or puncture a damaged tube before plugging it

💭 Think About

• Imagine the sagged tube is plugged at both ends and still has some water inside. What happens to that water as temperature rises? • Which of the choices describes a problem caused by trapped fluid in a closed space, rather than just metal overheating? • Ask yourself: is the primary danger mechanical (force/pressure) or purely thermal (overheating, cracking, burnout)?

✅ Before You Answer

• Identify which option clearly involves trapped pressure or expansion in a closed space • Confirm which choices relate more to overheating of metal rather than internal fluid expansion • Before choosing, picture the tube as a sealed container being heated and decide what the main safety concern would be.