When a propulsion boiler is removed from...

Question 1 / 270705eccefa0bacbc34ba4d46fd8

Question 1 of 270705eccefa0bacbc34ba4d46fd8

When a propulsion boiler is removed from service for an extended period, why should the firesides be thoroughly dried after water washing?

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Question 1 of 27070

When a propulsion boiler is removed from service for an extended period, why should the firesides be thoroughly dried after water washing?

🔍 Key Concepts

• Effects of moisture on metal surfaces over long idle periods • Difference between short-term shutdown and extended lay-up of boilers • What water washing leaves behind on the fireside surfaces

💭 Think About

• Ask yourself what happens to bare metal when it stays damp and exposed to air for weeks or months • Consider which of the choices describes a long-term effect rather than something that happens only at lighting off • Think about how moisture in soot, scale, and deposits affects the boiler internals over time

✅ Before You Answer

• Identify which option deals with long-term surface damage rather than immediate operating problems • Decide which answer is most directly linked to moisture left on the fireside after washing • Eliminate any choices that mainly relate to rapid heating or combustion at start-up, not to storage conditions

Question 1 of 27070

When a propulsion boiler is removed from service for an extended period, why should the firesides be thoroughly dried after water washing?

Prevent flarebacks on lighting off

Reduce the probability of corrosion

Prevent cracking of the brickwork

Reduce the possibility of thermal spalling