API-936 Exam - Topic 5 Question 19 Discussion

Actual exam question for API's API-936 exam

Question #: 19
Topic #: 5

[Curing and Dryout]

In accordance with TR 980, when curing a high-purity, low-cement castable for a high-temperature unit, which of the following sequences ensures minimum cracking risk?

ASteam curing for 48 hours followed by firing at 1500F

BAir curing for 24 hours, followed by controlled heating ramp of 50F/h up to 600F

CAccelerated drying using forced air at 400F for 12 hours

DDryout using open flame burners after form removal

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Suggested Answer: B

by Maryanne at May 11, 2026, 01:59 PM

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Micah

13 days ago

I think I remember that steam curing is often recommended for minimizing cracking, but I'm not sure if 48 hours is too long.

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