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API-936 (Refractory Personnel) Certification Exam is a globally recognized certification program that is designed to test and certify individuals with knowledge and expertise in the field of refractory materials. The API-936 certification is a valuable credential for professionals working in the petroleum, petrochemical, and power generation industries, where refractory materials play a critical role in the design and maintenance of high-temperature equipment.
API-936 (Refractory Personnel) Exam is a certification program offered by the American Petroleum Institute (API) to personnel involved in the installation, inspection, testing, and maintenance of refractory materials used in the petroleum and petrochemical industries. API-936 Exam assesses the knowledge and skills required to ensure the proper selection, installation, and maintenance of refractory materials to reduce the risk of equipment failure and downtime in high-temperature process environments. The API-936 certification is recognized globally as a benchmark for excellence in refractory materials engineering and is highly valued in the industry.
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API-936 exam covers a wide range of topics related to refractory materials and their applications, including refractory types, properties, and selection criteria, installation techniques, curing and drying processes, and quality control measures. API-936 exam also assesses the candidates' understanding of industry codes and standards, such as API, ASTM, and ASME, as well as safety practices and procedures. Refractory Personnel certification is valid for three years and requires individuals to pass a recertification exam after that period to demonstrate their continued competency in the field. API-936 Certification is a valuable asset for refractory professionals, as it confirms their expertise and enhances their marketability and career opportunities.
API Refractory Personnel Sample Questions (Q26-Q31):
NEW QUESTION # 26
When drying out a unit or vessel that has multiple refractories, schedules should be based on:
Answer: D
Explanation:
When drying out units withmultiple types of refractories, API 936 and API Technical Report TR 980 emphasize that the most conservative dryout schedule must be followed to avoid premature failure orexplosive spalling. This meanschoosing the refractory material or lining system that requires the longest duration or slowest heating rate.
Different refractory types-gunned, cast, plastic, or fiber-have varying sensitivities to moisture and thermal gradients. Selecting the schedule with the longest duration ensures full water removal, especially from thick sections or materials with high water retention capacity.
Reference:
API TR 980,Monolithic Refractories: Installation and Dryout, Section on "Dryout Procedures for Mixed Lining Systems" states: "The overall schedule shall default to the requirements of the component with the longest duration requirement or most sensitive thermal response."
NEW QUESTION # 27
For linings that use a surface layer of refractory plastic or a ramming mix, when should trimming, jointing, and venting be done?
Answer: D
Explanation:
When using refractory plastics or ramming mixes, it is critical thattrimming, jointing, and venting be performed before stopping work for the day or shift. API 936 and TR 980 specify that proper surface preparation helps relieve vapor pressure during dryout and prevents cracking. If these steps are postponed, the surface may dry unevenly or set improperly, complicating the subsequent installation and reducing bond quality between layers.
Venting paths are particularly important in thick plastic or ramming layers where moisture may be trapped, and jointing ensures layer-to-layer continuity. Trimming also smooths out inconsistencies and aligns the lining to specifications.
Reference:
API TR 980 - Section "Refractory Plastics and Ramming Mixes: Trimming, Jointing, and Venting" requires these actions be doneprior to any interruptionof installation work.
NEW QUESTION # 28
The destructive chemical reaction between refractories and external agencies at high temperatures, resulting in the formation of a liquid is called
Answer: C
NEW QUESTION # 29
For fire clay and some high alumina materials, the most commonly used index of refractoriness is known as:
Answer: B
NEW QUESTION # 30
Section of transfer line in which flow is in an upward direction is called
Answer: A
NEW QUESTION # 31
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