Valid API-936 Study Notes - API-936 High Quality

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API-936 certification program is primarily intended for refractory engineers, inspectors, and other professionals working in the refractory industry. Refractory Personnel certification program provides an opportunity for individuals to demonstrate their technical knowledge and expertise in the field of refractory materials. Refractory Personnel certification is highly valued by employers in the refractory industry and is often a requirement for certain job positions.

To be eligible for the API-936 Certification Exam, individuals must have a minimum of two years of experience working with refractory materials. They must also have a high school diploma or equivalent and be able to demonstrate their knowledge of refractory materials through a combination of training and experience.

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API Refractory Personnel Sample Questions (Q29-Q34):

NEW QUESTION # 29
The increase in linear dimensions and volume which occurs when materials are heated and which is counterbalanced by contraction of equal amounts when the materials are cooled.

A. Thermal conductivity
B. None of the above
C. Thermal expansion
D. Thermal shock

Answer: A

NEW QUESTION # 30
Spalling of layers from the hot surface of a refractory lining is called

A. Spalling
B. Crumbling
C. Sheeting
D. Erosion

Answer: A

NEW QUESTION # 31
When installing refractory castables in hot weather conditions, which of the following is acceptable? (This may have more than one correct answer; please select all that apply.)

A. Air conditioning of ambient air
B. Decreasing mixing time
C. Spraying water on equipment
D. Shading of equipment and mix area

Answer: A,C,D

Explanation:
API TR 980 provides guidance for hot weather installation, recommending:
"Preventive measures include shading material and equipment, cooling of mix water and forms, and in some cases, air conditioning of ambient air. Spraying water on equipment may be used to reduce radiant heat."
- API TR 980, Section 4.5.2
However, decreasing mixing time is not advised; it can result in insufficient material wet-out or inconsistent dispersion. Therefore:
A (air conditioning): Acceptable
B (decreasing mixing time): Not acceptable
C (shading): Acceptable
D (spraying water): Acceptable

NEW QUESTION # 32
Arrange for testing at either an independent laboratory or the manufacturer's plant is

A. Owner responsibility
B. Manufacturer responsibility
C. Contractor responsibility
D. Inspector responsibility

Answer: C

NEW QUESTION # 33
Throughout a period of at least 24 hours, test specimens for air-setting, phosphate-bonded castable refractories are:

A. heat cured, covered.
B. heat cured, uncovered.
C. air cured, covered.
D. air cured, uncovered.

Answer: D

Explanation:
Air-setting, phosphate-bonded castables rely on a chemical bonding mechanism that activates when exposed to ambient moisture and carbon dioxide. API 936 outlines that these materials should becured in ambient air without being covered, as covering can trap moisture and inhibit the proper development of the chemical bond. Covering or artificially heating during this early curing stage may lead to defects such as cracking or uneven setting.
Theminimum 24-hour air curingperiod ensures sufficient evaporation of excess water and the development of mechanical integrity before any handling, heat exposure, or further processing. Covering these castables may interfere with the air-bonding mechanism and is not recommended.
Reference:
API Std 936, Section 6.3.1: "Air-setting phosphate-bonded refractories shall be air cured, uncovered for at least 24 h." API TR 980, Section on Air-Setting Castables: Emphasizes the importance of allowing unrestricted air exposure during initial set.

NEW QUESTION # 34
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