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API-936 Certification Exam is conducted by the American Petroleum Institute (API), a leading trade association that represents the oil and gas industry. The API-936 certification program is based on the API Recommended Practice 936, Refractory Installation Quality Control Guidelines, which provides guidelines for the installation quality control of refractory materials. API-936 exam is designed to ensure that certified professionals have a comprehensive understanding of the guidelines and can effectively implement them in their work.

API-936 (Refractory Personnel) Exam is an internationally recognized certification program designed for professionals who work in the field of refractory installation and inspection. The API-936 Certification validates the knowledge and skillset of refractory personnel in the areas of installation, inspection, testing, and repair of refractory materials in high-temperature industrial settings. Refractory Personnel certification is issued by the American Petroleum Institute (API) and is widely accepted in the oil and gas industry.

API-936 exam covers a wide range of topics related to refractory materials, installation techniques, testing methods, and inspection procedures. API-936 exam consists of 120 multiple-choice questions, and candidates have four hours to complete it. To pass the exam, candidates must score at least 70% or higher.

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API Refractory Personnel Sample Questions (Q43-Q48):

NEW QUESTION # 43
Throughout a period of at least 24 hours, test specimens for air-setting, phosphate-bonded castable refractories are:

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

Answer: A

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 # 44
Materials that are easily reduced to a granular or powdery condition after placement are known as:

A. granular grog.
B. calcined frits.
C. mineral additives.
D. friable materials.

Answer: D

Explanation:
PerAPI Std 936, friable materials are defined as:
"Friable: A term applied to a material that is easily reduced to a powdery or granular state by crushing or rubbing."
-API Std 936, Section 3: Definitions
This is a key property considered in refractory evaluation because friability can indicate material weakness after installation.
Therefore:
A (friable materials)is the correct and technically defined term.
The other terms refer to distinct classes of materials not defined this way.

NEW QUESTION # 45
The physical attributes testing of manufactured bricks during pre-shipment testing shall require a minimum Acceptable Quality Limit (AQL) of:

A. 5%
B. 4%
C. 10%
D. 1%

Answer: A

Explanation:
API 936 mandates specific AQL values during pre-shipment testing:
"Physical property test results shall meet the specified requirements with a minimum AQL of 5.0 percent."
- API Std 936, Section 5.2.4
Hence, the correct AQL for physical property verification of pre-shipment brick testing is 5%.

NEW QUESTION # 46
The term "shelf life" refers to the maximum time:

A. material may be stored and remains in usable condition.
B. the mixed material can sit prior to use.
C. it takes for products to be manufactured and installed.
D. for material tests (expiration of test results).

Answer: A

Explanation:
Shelf life is defined as the maximum period during which a material may be stored under specified conditions and still remain in a usable condition. API 936 emphasizes that materials such as monolithic refractories, when stored properly, should be used within their specified shelf lives to ensure they retain the required properties for performance.
Reference:API Std 936, Section 5.1.3 - Material Storage and Handling: "Refractory materials shall not be used beyond their stated shelf life unless verified by the manufacturer or appropriate testing."

NEW QUESTION # 47
Equipment used during applicator qualification testing shall be:

A. less than five years old.
B. the same as will be used for the installation.
C. provided by the refractory manufacturer.
D. ASTM certified for qualification testing.

Answer: B

Explanation:
According to API 936, duringapplicator qualification testing, the equipment used must beidentical to the equipment that will be used in the actual installation. This ensures that all conditions (air pressure, nozzles, mixers, vibration tools, etc.) accurately reflect field performance and allow for a true demonstration of the applicator's ability to meet the project's quality requirements.
This rule eliminates discrepancies between mock-up performance and production work, which might otherwise compromise the quality of the installed refractory. Testing with alternative or idealized equipment does not represent real installation challenges.
Reference:
API Std 936, Clause 5.2.2:"The same equipment that will be used for the installation shall be used during the qualification testing."

NEW QUESTION # 48
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