API 936 Refractory Personnel Exam Prep FREE Sample Exam

Why would an inspector distinguish a witness point from a hold point?

The two terms are interchangeable and either one always stops all work

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At a witness point work may proceed if the inspector is properly notified and does not attend, while at a hold point work must stop until the inspector releases it

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A witness point applies only to laboratory tests, while a hold point applies only to field work

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A witness point is set by the applicator, while a hold point is set only after work is complete

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How does the manufacturer support material qualification testing?

By waiving all testing if the product was used before

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By accepting the finished lining on behalf of the owner

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By witnessing every production hold point in place of the inspector

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By supplying material, product data, and technical information needed for qualification

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What is the correct response when a delivery’s paperwork and physical labels disagree on the product designation?

Trust the paperwork because it was prepared in an office

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Trust the labels because they are attached to the material

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Install the material under whichever designation suits the schedule

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Hold the delivery and resolve the discrepancy with the supplier; neither source may be assumed correct until they are reconciled

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A data sheet is missing for a delivered specialty castable, but the crew knows the product name. What is the quality-correct position?

Proceed on the crew's general experience with castables

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Use the data sheet of the most similar product on site

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Properties do not matter as long as the product name matches the order

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Obtain the manufacturer's data sheet for that product before relying on its properties or installation requirements

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A plastic refractory workability check is performed hours after the sample was taken, during which the sample sat exposed and stiffened. The index comes back low. What must be considered before concluding the delivered material is unworkable?

Workability never changes after sampling

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The low value proves the entire shipment should be returned

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The delay and exposure themselves reduce workability, so the test condition — not just the material — may explain the low index

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Exposed samples should be re-wetted until they feel right and then tested

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After firing, a test bar originally 240.0 mm long measures 237.6 mm. A trainee asks what the calculated change of -1.0% means for lining design. Which interpretation should the inspector give?

The material gained volume during firing and will tighten every joint

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The value is a strength loss of 1.0% and can be ignored

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The material shrank permanently on heating, so expansion allowances and joint design must account for that contraction

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The value proves the material was under-fired and must be discarded

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On a lining drawing, what can anchor symbols and notes tell an installer?

Anchor type, location or pattern, and installation details intended for each area

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Only the name of the company that drew the drawing

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The operating temperature of a different unit

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Nothing, because anchors are decided entirely in the field

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Why can a single failed anchor area lead to loss of a larger lining section than the area itself?

Lining sections are completely independent at every point

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Adjacent lining is held only by the failed patch's colour

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Lining sections depend on the support around them, so losing retention in one area can undermine adjacent material

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Damage spread is impossible in refractory linings

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How should a change to a different fiber product mid-job be treated?

As a non-event, because all fibers are interchangeable

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As an opportunity to use up old stock in any proportion

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Fiber changes never need documentation

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As a material change requiring verification that the new fiber matches the specified type and addition for the design

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When mixing a castable, what governs how much water should be added?

The manufacturer's data sheet for that specific material

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The installer's past habit with a different castable

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The amount that makes the mix easiest to place

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A single water amount used for all castables on the job

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What role does trending nonconformances play during work on an FCC unit riser?

Tracking types and frequency reveals developing systemic problems early enough to correct the process

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Trends matter only after the job ends

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Individual reports contain all needed information with no pattern view

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Trending is only a final-report statistic

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Which combination best reflects the practical inspection approach for a monolithic lining in a rotary kiln section?

Destructive removal of representative halves of the lining

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Radiography alone with no visual examination

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No inspection if the material was qualified

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Visual examination as the primary method, supplemented by sounding, thickness checks, and coring where required

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API 936 Refractory Personnel Exam Prep FREE Sample Exam — Fixed Set

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