Which outcome results when early steam engine boilers experience repeated heating-cooling cycles?

💡 Explanation

When boilers undergo repeated heating/cooling, thermal fatigue occurs because expansion and contraction create cyclic stress concentrations around rivets and joints, driving crack propagation. Therefore fatigue cracking results, rather than efficiency gains, fuel reduction, or uniform expansion which require different material properties and operating conditions.

• Which error introduced using a sextant at sea most directly affects computed vessel position?
• Which benefit resulted from the annual sediment dredging in ancient Aztec chinampa agriculture?
• Which outcome was LEAST likely to result from poorly-maintained terrace systems in pre-Columbian Andean agriculture?
• Which soil characteristic primarily allowed Aztec chinampas to sustain continuous maize cultivation?
• Which benefit did the ancient Chinampa raised-field cultivation technique provide relative to traditional floodplain farming?
• Which constraint limited consistent maize yields in pre-Columbian chinampa agriculture despite nutrient-rich conditions?