Free API API-936 Practice Test & Real Exam Questions

Exam Code/Number: API-936
Exam Name/Title: Refractory Personnel
Certification Provider: API
Corresponding Certification: Individual Certification Programs

Exam Questions: 87
Updated On: Jun 29, 2026

Question #19

Cold wall refractory lined components shall be dried out by heating from:

A. the cold face only.

B. the outside the steel shell.

C. inside an oven.

D. the hot face only.

Discussion 0

Correct Answer: D Vote an answer

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Question #20

An alternative to wire mesh baskets is a panel with enclosed sides when the:

A. dimensions are less than 18 in. (450 mm) * 18 in. (450 mm) * 4 in. (100 mm)

B. samples are cut with an abrasive medium

C. dimensions are greater than 18 in. (450 mm) * 18 in. (450 mm) * 4 in. (100 mm)

D. samples are cut from the edge of the panels

Discussion 0

Correct Answer: C Vote an answer

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Question #21

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

A. 10%

B. 4%

C. 1%

D. 5%

Discussion 0

Correct Answer: D Vote an answer

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Question #22

For linings that use a surface layer of refractory plastic or a ramming mix, when should trimming, jointing, and venting be done?

A. After the entire installation is complete

B. After water curing for 24 hours

C. Before stopping work for the day or shift

D. Never; these steps are not required when refractory plastics or ramming mixes are used

Discussion 0

Correct Answer: C Vote an answer

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Question #23

When drying out a unit or vessel that has multiple refractories, schedules should be based on:

A. the refractory with the highest density in the dryout.

B. an average of heating rates and holding times for the refractories and thicknesses being dried out.

C. extending the hold times by one hour per additional refractory layer.

D. the refractory or lining system that has the longest duration requirement.

Discussion 0

Correct Answer: D Vote an answer

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Question #24

What characteristic shall be required for form selection?

A. Self-supporting

B. Resist chemical attack

C. Transparent

D. Resist mechanical loads

Discussion 0

Correct Answer: A Vote an answer

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Question #25

When installing refractory castables in hot weather conditions, which of the following is acceptable? (This may have more than one correct answer; please select all that apply.)

A. Shading of equipment and mix area

B. Air conditioning of ambient air

C. Decreasing mixing time

D. Spraying water on equipment

Discussion 0

Correct Answer: A,B,D Vote an answer

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Question #26

Which party or individual is responsible for submitting a dryout procedure for a new lining?

A. Dry-out company

B. Inspection company

C. Contractor

D. Refractory manufacturer

Discussion 0

Correct Answer: C Vote an answer

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Question #27

Which of the following statements regarding curing of hydraulic bonded castables is true?

A. No part of the lining shall be allowed to air dry more than 3 hours before application of a curing compound

B. The membrane curing compound shall burn off at a temperature not less than 500°F (260°C)

C. After remaining in place for 24 hours, forms shall be removed and a curing compound applied within 1 hour of form removal

D. Apply a manufacturer approved membrane-type curing compound before the surface is dry to the touch

Discussion 0

Correct Answer: A Vote an answer

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