API 936 – Refractory Personnel Certification Practice Exam

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• What is the optimum amount of mixing for gunning?
• What size test panel is required for thin layer erosion resistance refractories?
• What is the initial heating rate for oven firing refractories?
• What should suggested color coding for metallic anchors be referenced from?
• During the curing of chemically bonded refractories, what is a specific requirement?
• What is the definition of an Independent Laboratory in the context of refractory testing?
• What is one responsibility of the inspector regarding the hammer test for installed lining?
• Who is responsible for measuring the workability index on plastic refractories?
• Who is responsible for preparing a detailed specification and execution plan?
• Who is responsible for mixing and forming test sample refractories?
• How should dryout heating of cold wall refractory be conducted?
• What is included in the contractor's responsibilities for installation quality control?
• If the density of an "As installed material" is reported at +6 lb/ft³, is this acceptable?
• What is the minimum cure time before cutting larger dimensions to the required size?
• What is the recommended testing frequency for erosion service?
• Which of the following is NOT an example of a Hexalt type anchor?
• When is the workability index for plastic refractories to be measured?
• For dryout heating control, what should be monitored throughout the newly lined areas?
• How should Thick Layer, Plastic Installations be executed?
• What is the recommended approach to minimize rebound during gunning?
• Which two actions are mandatory when using API 936?
• What is the maximum allowable cool down rate included in the dryout plan?
• What is required for the applied refractory lining in thick layer, plastic installations?
• What is the purpose of Material Qualification Testing?
• What is a required characteristic of the test panel for pneumatic gunning?
• What is a Test Specimen?
• What is the typical weight percentage range for metal fiber concentrations used in refractories?
• What should the backing plate used for thick layer, plastic installations be coated with?
• When gunning stoppages exceed 30 minutes, what thickness lining should be retained?
• What is the correct procedure for measuring specimen dimensions according to API 936?
• What action should an inspector take when encountering documented nonconformance?
• How should air-setting phosphate bonded refractories be mixed?
• What should the inspector do if a conflict arises between specified standards and installed refractory quality?
• What type of property is Compressive Strength categorized as?
• Which of the following is a physical property requirement for Material Qualification Testing?
• What is the recommended cooling rate after reaching the final oven firing temperature?
• Which method can be applied in the testing of castings as per installation work?
• What should be done with rebound material during gunning operations?
• What is the role of a heating contractor in refractory work?
• What is the required angle for the test panel to demonstrate the abilities of the nozzle/gun operator?
• What additional requirement must be fulfilled by the inspector regarding contractor records?
• What must be included in the mock-up for vibration cast installation?
• What should the inspector ensure regarding material and applicator qualification test results?
• What type of tests shall be conducted on test specimens for thin layer erosion resistance refractories?
• What are the panel dimensions required for thick layer, plastic installations?
• How should the initial gunning operations be conducted?
• What is an important feature of a mixer for pump casting?
• What is the minimum curing time for hydraulic bonded castable refractories?
• What type of documentation is necessary for contractor responsibilities?
• What is a requirement for the acceptance of lining thickness tolerances?
• What storage condition is required for determining the shelf life of refractory materials?
• Which of the following qualifications is required for inspection personnel?
• What are two primary duties of a refractory inspector?
• Which of the following is NOT a physical property standard that the test specimen shall be tested for?
• What is the size of the required specimens for cold crushing strength tests?
• What is the first step in the procedure for adding metal fibers during lining installation?
• What should be used for gunning installations?
• When is "flashing" not permitted on a project?
• What size specimens should be used for testing according to ASTM C113?
• Which of the following is not a characteristic of "flashing"?
• What does the mock-up for vibration cast installation demonstrate?
• What must be ensured when installing heat-setting plastic refractories?
• During placement testing for thin layers, who is responsible for packing the sample?
• What is the minimum curing time for newly applied refractory lining before moving or stripping forms?
• In cases involving repair and maintenance, what can the owner request from the inspector?
• How should the dryout heating process be controlled?
• Is water slicking of the finished lining surface permitted?
• Which ASTM standard is required for abrasion resistance type refractory testing?
• Which two types of anchoring systems may be used in thin layer erosion resistance refractories?
• What is the required cure time for newly installed linings?
• When may the inspector's participation be waived or reduced?
• What is the drying method for hot wall refractory line components?
• What is a requirement for handling and delivery in vibration cast installation?
• What is an essential requirement for the mixing equipment used for air-setting phosphate bonded refractories?
• What two items are used to terminate work areas in gunning operations?
• Which of the following is a method of forming test specimens?
• Why are aluminum paddles and bowls not permitted for mixing refractories?
• What is the maximum weight variance allowed for refractory in the bag?
• What is the primary focus of refractory testing?
• What initial steps must a contractor take for applicator qualification testing?
• What is the required temperature range for installation of refractory?
• What task should a contractor schedule to qualify all equipment for installation work?
• What types of tests are required for the casting installation?
• Can cutback material be reused in installations?
• What can happen if the initial qualification period is exceeded?
• What is the maximum allowed shelf life after a re-qualification test?
• For "As installed material," what minimum cold crushing strength percentage is required?
• What does the drying method for cold wall refractories prohibit?
• What is NOT a requirement for wetting during the curing process?
• After how many hours can mock-up panels be stripped for visual inspection?
• What is the primary consideration during gunning to achieve full thickness?
• Which of the following is a key to accountability for contractors in refractory installations?
• When should metal fiber reinforcement be utilized in refractory installations?
• How is density measured in the context of casting installation?
• What is required for dryout heating of complex vessels?
• Acceptance criteria for which type of test is described in the Quality Standards?
• What does a Production Run refer to in refractory manufacturing?
• What is a permissible angle for down hand gunning without special agreement?
• How should Permanent Linear Change test specimens be measured?
• What down hand gunning limit is prohibited during operations?
• If a sample fails to meet specifications, what is the retesting procedure?
• What aspect of the dryout plan should be reviewed by the contractor?
• What is the mixer capacity requirement for pump casting?
• Why are organic fibers sometimes used in refractory installations?
• What is recommended regarding the installation of organic fibers in refractories?
• What should be used to mark refractory specimens after curing?
• What is Density a measure of in the context of refractory materials?
• Which device is necessary for ensuring a waterproof casting operation?
• Which of the following is a reference recommended within API 936?
• Which two items are essential for thickness measurement during gunning operations?
• What is the purpose of consolidating each clump of refractory material during installation?
• What does Erosion Resistance refer to in refractory testing?
• What are the acceptance/rejection criteria for as-installed testing?
• What must happen if there is a disagreement over the quality of installed refractory?
• Is field water addition or reconditioning allowed for heat-setting refractories?
• What is the role of the contractor regarding material qualifications testing?
• Which factor influences the qualification test for refractory shelf life?
• How are densities determined according to API 936?
• Which materials are permitted for forming test specimens?
• What characteristic defines heat setting refractories during the curing process?
• What is the recommended method for initial dryout heating of newly installed refractory linings?
• What is one of the inspector's duties when engaged as a witness during testing?
• What is one of the contractor responsibilities in Applicator Qualification Testing?
• What is required for the visual inspection of the test panel?
• Which method is NOT used to provide excess moisture during the curing stage?
• What must be included in the Execution Details?
• For Permanent Linear Change Test specimens, how should length change be calculated?
• What is the purpose of using a backing plate during refractory installation?
• What type of refractory allows for sealing and excess moisture during the curing stage?
• What is the minimum sample requirement for placing thin layer, erosion-resistant linings and plastics?
• What is the required curing condition for heat-setting plastic refractories?
• Which of the following is NOT a responsibility of the operative testing party?
• What type of paddle is discouraged from use due to reactivity concerns?
• What constitutes the acceptance/rejection criteria for qualifications testing according to API 936?
• How many months after a succeeding qualification test can the respective batch be re-qualified?
• What is a mandatory item required for casting applicator qualification testing?
• What is the minimum cure time required for freshly placed air-setting and cement-bonded refractories?
• When should the backing plate be removed for thick layer, plastic installations?
• What is the minimum sensitivity and maximum loading rate for castable type refractory rated over 100 lb/ft³?
• How many specimens are required for the "For Erosion Service" type test of abrasion resistance?
• When is the removal of the back panel permitted after the completion of the panel?
• Who is responsible for informing the owner of testing arrangements and timing?
• Which of the following is NOT a result taken from a test sample?
• What is the minimum curing time for refractory cast in mock-up panels?
• For casting testing, what is the minimum sample requirement per mixing crew?
• What ASTM standard is specified for Cold Crushing Strength Testing?
• What does the scope of API 936 provide?
• What are Monolithic Refractories?
• What are the temperature limits for mixing refractory and water?
• What is the minimum oven drying time required for heat-setting plastics?
• What is a primary responsibility of the inspector during the installation process?
• How should hydraulic bonded castable refractories be packaged?
• What is the mixer capacity requirement for vibration casting in pipe sections?
• How shall Thin Layer, Erosion Resistant refractory linings be applied?
• How shall chemical setting refractories be packaged?
• What is the primary focus when mixing refractory materials?
• Which of the following is a contractor responsibility during refractory installation?
• What condition must be fulfilled before larger dimensions can be cut from refractories?
• To achieve a good compaction of Thick Layer, Plastic Installations, each clump should be?
• Which is an essential tool for monitoring during the dryout process?
• What does satisfactory examination and test results for pump and cast installation qualify?
• What are two mandatory requirements for casting operation forms?
• Before the dryout procedure is submitted for approval, what must be finalized?
• At what temperature should refractories be held for 5 hours during oven firing?
• In casting installation, vibration is only allowed for which types of casting?
• What is mentioned regarding the responsibilities of the inspector in API 936?
• What is one of the five requirements in Quality Standards?
• What is meant by Linear Change in refractory testing?
• What is the minimum sample requirement for gunning as-installed testing?
• How many test specimens are normally taken for testing?
• What defines Erosion Services according to the text?
• Which of the following items is NOT typically included in design details?
• Which code is cited in the recommended practice of API 936?
• What should be included in the labeling of hydraulic bonded castable refractories?
• How soon must refractory materials be applied after initial qualification?
• Which three release agents are typically used in casting forms?
• Which three methods can be used to aid refractory flow?
• What temperature range must be maintained during the curing period of refractories?
• What category of items should be used as a guide for thickness measurement in gunning?
• What must be done to ensure that panels used for testing are effective?
• After curing, what should be done with the refractory specimens?
• What type of water is recommended for mixing with refractories?
• How long must air-setting phosphate bonded castable refractories be air cured?
• What is the required size for a test panel in pneumatic gunning?
• What alternative can be used instead of a wire mesh basket for testing?
• What are metal fiber lengths typically used in refractories?
• What is a mixer capacity requirement for vibration casting?
• What is the term “flashing” in gunning operations?