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API Exam API-571 Topic 1 Question 89 Discussion

Actual exam question for API's API-571 exam
Question #: 89
Topic #: 1
[All API-571 Questions]

For some materials such as titanium, carbon steel and low alloy steel, the number of cycles to fatigue fracture decreases with ________ until an endurance limit is reached. Below this endurance limit, fatigue cracking will not occur, regardless of the number of cycles.

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Suggested Answer: B

by Eve at Jun 20, 2024, 12:53 AM

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Fairy
26 days ago
The endurance limit is a critical concept, but I'm still feeling a bit fatigued from all the studying. Guess I'll have to power through this one!
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Paul
1 months ago
Hmm, this one's tricky. I'll have to think it through carefully. Maybe I'll just guess and hope for the best.
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Floyd
3 days ago
User 2: I'm not sure, but I'll go with B) Stress endurance.
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Alona
23 days ago
User 1: I think it might be A) Temperature increases.
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Nieves
1 months ago
Haha, this question is a piece of cake! Of course, it's B. Stress endurance. Who doesn't know that?
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Mary
2 months ago
I'm not sure, but I think it might be B) Stress endurance, as higher stress levels can also contribute to fatigue failure.
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Joanne
2 months ago
I'm going with D. None of the above. The question is asking about what the number of cycles decreases with, not what happens below the endurance limit.
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Pamella
1 months ago
User 2: I disagree, I'm going with B) Stress endurance.
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Georgene
1 months ago
User 1: I think it's A) Temperature increases.
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Ronnie
2 months ago
Option A seems correct to me. As temperature increases, the material's resistance to fatigue decreases, leading to a lower number of cycles to failure.
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Jamika
15 days ago
User 4: Definitely. Understanding how temperature impacts fatigue can help prevent unexpected failures.
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Yuette
16 days ago
User 3: So, it's important to consider the effect of temperature on materials when designing for fatigue resistance.
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Ailene
21 days ago
User 2: I agree. Higher temperatures can weaken the material and make it more susceptible to fatigue failure.
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Thora
1 months ago
User 1: I think option A is correct. Temperature increases can lead to a decrease in the number of cycles to fatigue fracture.
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Peggy
2 months ago
I agree with Arthur, because higher temperature can weaken the material and lead to fatigue cracking.
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Arthur
2 months ago
I think the answer is A) Temperature increases.
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