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Questions and Answers
What is precision characterized in terms of?
What is precision characterized in terms of?
- Mean
- Standard deviation (correct)
- Mode
- Range
A result is considered valid if it is:
A result is considered valid if it is:
- Accurate only
- Precise only
- Both accurate and precise (correct)
- Neither accurate nor precise
Which classes of well cements are covered in the document?
Which classes of well cements are covered in the document?
- Classes M and N
- Classes G and H
- Classes A, B, C, and D (correct)
- Classes X and Y
What does the document specify for well cement classes G and H?
What does the document specify for well cement classes G and H?
Which referenced document is indispensable for the application of this document?
Which referenced document is indispensable for the application of this document?
What does the specification allow for in terms of equipment and engineering solutions?
What does the specification allow for in terms of equipment and engineering solutions?
When is it the responsibility of the vendor to identify variations from the specification?
When is it the responsibility of the vendor to identify variations from the specification?
What does 'calibrating an instrument' refer to in the specification?
What does 'calibrating an instrument' refer to in the specification?
What do the US Customary (USC) units provided in brackets represent?
What do the US Customary (USC) units provided in brackets represent?
What is accuracy related to in the context of a measurement?
What is accuracy related to in the context of a measurement?
Why are temperature values rounded to the nearest degree in the specification?
Why are temperature values rounded to the nearest degree in the specification?
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Study Notes
- This specification outlines requirements and recommendations for six classes of well cements and two classes of composite well cements.
- Well cement classes A, B, C, and D are obtained by grinding Portland cement clinker with interground or blended calcium sulfate (CaSO4) as an additive. Processing additives and set-modifying agents can be used.
- Composite well cement classes K and L are obtained by intergrinding Portland cement clinker with composite constituents or by blending separately produced Portland cement with separately processed composite constituents.
- Metric SI and US customary units are used in this document, with conversions rounded for ease of use.
- API Specification 13A and ASTM C109/C109M, as well as other referenced documents, are indispensable for the application of this specification. They provide standards for testing compressive strength of hydraulic cement mortars and chemical analysis of hydraulic cement.
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