API-936 Exam - Topic 2 Question 16 Discussion

Actual exam question for API's API-936 exam

Question #: 16
Topic #: 2

[All API-936 Questions]

[Acceptance Criteria]

Maximum allowable crack length, visible on the surface of a dense firebrick, is:

A1/4 in. (6 mm)

B3/8 in. (10 mm)

C1/2 in.(12 mm)

D3/4 in. (19 mm)

Show Suggested Answer

Suggested Answer: C

by Rosina at Apr 03, 2026, 04:28 PM

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14 days ago

Totally agree, that’s the standard.

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19 days ago

It's 1/4 in. (6 mm) max!

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1 month ago

I remember the instructor mentioning that anything over 1/4 in. is usually a concern, so I’m leaning towards that option.

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2 months ago

I’m a bit confused; I thought it might be 3/8 in. based on what we discussed in class, but I can't recall clearly.

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2 months ago

I practiced a similar question, and I feel like the maximum allowable crack length was around 1/2 in.

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2 months ago

I think I remember something about crack lengths in firebricks, but I'm not entirely sure if it's 1/4 in. or 3/8 in.

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