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API-936 Exam Questions
Exam Name: Refractory Personnel
Exam Code:
API-936
Related Certification(s): API Certifications
Certification Provider: API
Actual Exam Duration: 195 Minutes
Number of API-936 practice questions in our database:
85 (updated: Jun. 19, 2025)
Expected API-936 Exam Topics, as suggested by API :
- Topic 1: Laboratory Testing Procedures: This section of the exam measures the skills of Quality Control Technicians and covers the understanding and execution of various laboratory testing methods used in refractory materials. Candidates should be familiar with industry terms and definitions, common test procedures like C704, CCS, PLC, and density, and be able to perform related calculations. The section also assesses knowledge of how to qualify materials, operate testing equipment, prepare samples correctly, and understand dimensional standards. In addition, it includes awareness of materials used, such as ceramic fibers or corrosion coatings, along with curing and firing methods, acceptance and rejection criteria, and proper documentation responsibilities.
- Topic 2: Applicator and Material Qualification: This section of the exam is designed for Refractory Applicators and focuses on installation practices and material handling skills needed to ensure quality application of refractory systems. It covers key methods such as gunning, casting, ramming, and hand packing, as well as how to prepare samples and determine the right amount of water for mixing. Candidates must understand formulation basics, equipment use, mock-up and test panel requirements, and how to maintain environmental controls. This domain also emphasizes surface preparation, proper procedures for material qualification, and the documentation expected from applicators during qualification.
- Topic 3: Installation: This section of the exam measures skills of Field Supervisors and includes knowledge needed to oversee and execute refractory installation activities according to quality standards. It involves understanding installation terms, documentation responsibilities, execution planning, and design requirements. Other topics include packaging and storage, surface cleanliness, anchor installation details, and how to properly conduct sampling during production. Candidates must also be familiar with water and fiber mixing processes, environmental temperature controls, and key procedures and equipment for gunite, casting, ramming, and hand packing methods.
- Topic 4: Inspection: This section evaluates the knowledge of Refractory Inspectors and focuses on inspection standards, procedures, and techniques used to verify proper refractory installation. It includes key terminology, job specifications, lining design knowledge, and both visual and non-destructive testing methods such as radiography or core sampling. Candidates must also understand the limits of inspection techniques, the importance of material traceability, criteria for acceptance or rejection, repair procedures, and documentation duties. This domain also assesses understanding of curing, dry-out procedures, and proper record-keeping systems.
- Topic 5: Post-Installation: This section of the exam measures skills of Commissioning Technicians and focuses on the processes that occur after refractory installation is complete. Topics include post-installation terminology, personnel roles, and documentation requirements. Candidates must understand dry-out and sealing methods such as water misting or membrane curing, along with environmental requirements for proper curing. The section also includes the use of heating equipment, placement of temperature sensors, adherence to manufacturer-recommended heat-up and cooldown schedules, and knowledge of proper heating rates for various refractory types. Lastly, it covers techniques for verifying the integrity of the final lining.
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Free API API-936 Exam Actual Questions
Note: Premium Questions for API-936 were last updated On Jun. 19, 2025 (see below)
Question #1
[Installation Procedures]
All newly installed air-setting, hydraulic, and chemically bonded linings should be allowed to cure at the proper temperature before initial heating for a minimum of:
Correct Answer:
C
Question #2
[Material Requirements]
Hydration is the process that causes refractory concrete to:
Correct Answer:
D
Question #3
[Inspection and Testing Requirements]
From each production run, the testing frequency for erosion service refractory is one sample per:
Correct Answer:
B
Question #4
[Acceptance Criteria]
Maximum allowable crack length, visible on the surface of a dense firebrick, is:
Correct Answer:
C
Question #5
[Material Requirements]
Which of the following conditions must be met for test results from trial mixes of low cement castables to be accepted for qualification?
Correct Answer:
A
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