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 #28

Initial heating of newly installed refractory linings shall be performed with:
(This may have more than one correct answer; please select all answers that apply.)

A. open torches.

B. electrical heating elements.

C. process heating devices.

D. portable burners.

Discussion 0

Correct Answer: B,C,D Vote an answer

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Question #29

Apparent porosity values are reported as:

A. cubic inches/centimeters.

B. pounds per square inch/kilograms per square centimeter.

C. inches/centimeters.

D. percentages.

Discussion 0

Correct Answer: D Vote an answer

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Question #30

If the refractory lining is required before pressure testing, all pressure-retaining welds shall:

A. remain unlined and exposed to test medium.

B. include additional anchors.

C. be lined with coal tar epoxy.

D. be gunned with no needles.

Discussion 0

Correct Answer: A Vote an answer

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Question #31

The best definition for creep is:

A. an increase in expansion at high temperatures.

B. deformation due to continuous load over time.

C. shrinkage at high temperatures.

D. cracking caused by thermal shock.

Discussion 0

Correct Answer: B Vote an answer

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Question #32

Abrasion resistance of a material is reported as loss of:

A. density.

B. mass.

C. volume.

D. area.

Discussion 0

Correct Answer: C Vote an answer

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Question #33

Which of the following conditions must be met for test results from trial mixes of low cement castables to be accepted for qualification?

A. The water content must not vary more than ±1.0% from that recommended by the manufacturer.

B. Bulk density and CCS must exceed average values published in ASTM C401.

C. The drying process must be conducted at 220°F (104°C) for at least 48 hours before firing.

D. Specimens must be fired at 1500°F (815°C) and held for a minimum of 3 hours.

Discussion 0

Correct Answer: A Vote an answer

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Question #34

Equipment used during applicator qualification testing shall be:

A. the same as will be used for the installation.

B. ASTM certified for qualification testing.

C. provided by the refractory manufacturer.

D. less than five years old.

Discussion 0

Correct Answer: A Vote an answer

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Question #35

A layer coat of refractory lining that is applied to an existing lining in an attempt to extend the lining's life is known as:

A. paint

B. overspray

C. buttercoat

D. overlay

Discussion 0

Correct Answer: D Vote an answer

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Question #36

Plastic refractories with a workability index below the manufacturer's minimum required value shall be:

A. subject to additional production sample testing.

B. subject to requalification or discard.

C. mix with additional water or activator.

D. accepted if the material is still workable.

Discussion 0

Correct Answer: B Vote an answer

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