API-936 Exam Dumps Free Test Engine Verified By Individual Certification Programs Certified Experts [Q29-Q45]

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API-936 Exam Dumps Free Test Engine Verified By Individual Certification Programs Certified Experts

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API-936 exam was developed by the American Petroleum Institute (API) and is recognized worldwide as the standard for refractory personnel certification. API-936 exam covers a wide range of topics, including refractory materials, design and installation, quality control, and inspection techniques. It is a rigorous exam that requires a thorough understanding of refractory materials and their application in various industries.

API-936 (Refractory Personnel) Exam is a certification exam offered by the American Petroleum Institute (API) that is designed for individuals who work in the field of refractory installation and inspection in the oil and gas industry. API-936 exam is designed to test the knowledge and skills of the candidates in various areas such as refractory materials, installation, testing, and inspection.

NEW QUESTION 29
A pigment shall be used in the curing compound in order to:

prevent ultraviolet light damage.

help the lining retain moisture.

help the lining retain heat.

indicate full coverage.

Pigment in curing compounds serves a visual function to verify that the applied coating has achieved full and even coverage across the refractory surface. This aids inspectors in confirming compliance with curing requirements.
Reference:API Std 936, Section 6.3.2 – Curing Requirements: “A pigment shall be included in the curing compound to provide visual confirmation of coverage during application.”

NEW QUESTION 30
Fiber concentrations typically range is

1 – 4 wt percent

1 – 3 wt percent

1 – 2 wt percent

Any of the above

NEW QUESTION 31
A change in the length of a specimen measured before and after heating to a specific temperature is referred to as:

Modulus of rupture.

Permanent linear change.

Modulus of elasticity.

Pyrometric cone equivalent.

Permanent linear change (PLC)measures the irreversible dimensional change of a refractory specimen after it is subjected to a high temperature for a specified duration. It is expressed as a percentage of the original length. This property helps evaluate the stability and thermal compatibility of refractory materials during service.
This is distinct from:
Modulus of rupture (A): a strength test under bending.
Modulus of elasticity (C): a measure of stiffness.
Pyrometric cone equivalent (D): a test for melting behavior.
Reference:
API Std 936 – Referencing ASTM C113 and C356 for permanent linear change testing procedures

NEW QUESTION 32
An internal component used for the separation of solids from flue or product gas in a fluid coking unit is called

A cyclone

Plenum

Riser of FCU

None of the above

NEW QUESTION 33
A refractory materials, stiffer than plastic, that cannot be extruded but has suitable properties to permit ramming into place to form a monolithic structure

Plastic refractory

Ramming mix

Monolithic refractory

None of the above

NEW QUESTION 34
Which of the following is the term for aggregate and/or cement that bounces away from a surface against which refractory is being projected by gunning?

Slurry

Trimmings

Rebound

Overspray

The term “rebound” is officially defined in API Std 936 as follows:
“Rebound: That portion of a refractory that does not adhere to the surface and falls away when a material is applied by gunning.”
– API Std 936, Section 3, Definitions
This makes “rebound” the precise and correct term describing the material that fails to adhere during gunning.
The other options, such as “slurry,” refer to different material states or applications, and “trimmings” or
“overspray” are not used with this specific meaning in the standard.

NEW QUESTION 35
What temperature is required to form a permanent bond in phosphate-bonded plastic refractory?

100°F to 300°F (38°C and 150°C)

50°F to 100°F (10°C and 38°C)

300°F to 500°F (150°C and 260°C)

500°F to 700°F (260°C and 370°C)

Phosphate-bonded plastic refractories develop their final bonding during high-temperature exposure. As described in TR 980:
“Phosphate-bonded plastics require temperatures between 500°F and 700°F (260°C and 370°C) to form a permanent ceramic bond.”
– API TR 980, Section 5.2.3

NEW QUESTION 36
Alumina – silica refractories containing 45% or more alumina, materials used in their production include diaspore, bauxite, gibbsite, kyanite, sillimanite, alusite, and fused alumina (artificial corundum) is called

fire clay refractory

insulating refractories

high alumina refractories

all of the above

NEW QUESTION 37
When drying out a unit or vessel that has multiple refractories, schedules should be based on:

the refractory with the highest density in the dryout.

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

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

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

When drying out units withmultiple types of refractories, API 936 and API Technical Report TR 980 emphasize that the most conservative dryout schedule must be followed to avoid premature failure orexplosive spalling. This meanschoosing the refractory material or lining system that requires the longest duration or slowest heating rate.
Different refractory types-gunned, cast, plastic, or fiber-have varying sensitivities to moisture and thermal gradients. Selecting the schedule with the longest duration ensures full water removal, especially from thick sections or materials with high water retention capacity.
Reference:
API TR 980,Monolithic Refractories: Installation and Dryout, Section on “Dryout Procedures for Mixed Lining Systems” states: “The overall schedule shall default to the requirements of the component with the longest duration requirement or most sensitive thermal response.”

NEW QUESTION 38
Materials that are easily reduced to a granular or powdery condition after placement are known as:

friable materials.

calcined frits.

mineral additives.

granular grog.

PerAPI Std 936, friable materials are defined as:
“Friable: A term applied to a material that is easily reduced to a powdery or granular state by crushing or rubbing.”
-API Std 936, Section 3: Definitions
This is a key property considered in refractory evaluation because friability can indicate material weakness after installation.
Therefore:
A (friable materials)is the correct and technically defined term.
The other terms refer to distinct classes of materials not defined this way.

NEW QUESTION 39
The destructive chemical reaction between refractories and external agencies at high temperatures, resulting in the formation of a liquid is called

Slagging of refractories

Slumping of refractories

Dusting of refractories

None of the above

NEW QUESTION 40
Pre-turn around planning means

At least 6 months prior to the turnaround

At least 12 months prior to the turnaround

At least 8 months prior to the turnaround

Any of the above

NEW QUESTION 41
API 936, the standard test method for abrasion resistance of refractory materials at room temperature is

C 113 – 02

C 704 – 01

C 181 – 91

None of the above

NEW QUESTION 42
When performing the ASTM C704 and ASTM C133 refractory tests, the specimen should be fired to what temperature?

815°F (435°C)

1000°F (540°C)

1500°F (815°C)

2730°F (1500°C)

As per the testing procedures outlined in API 936:
“All specimens used in ASTM C704 and ASTM C133 tests shall be dried and fired to 1500°F (815°C) prior to testing.”
– API Std 936, Section 6.3.1
Firing to 1500°F ensures proper evaluation of the refractory’s behavior under service conditions.

NEW QUESTION 43
Refractory failure mechanisms are.

Erosion and corrosion

Thermal shock and mechanical abuse

Overheating and chemical attack

All of the above

NEW QUESTION 44
Surface preparation and welding procedures are the responsibility of the:

Owner.

Contractor.

Inspector.

Manufacturer.

According to API Std 936 – Refractory Installation Quality Control, the roles and responsibilities of each party are clearly defined. Specifically, it states:
“The contractor shall be responsible for… the preparation of the surface prior to lining, and the quality of the workmanship, including the welding of anchors and any required preheat or post-weld heat treatment.”
– API Std 936, Section 5.3.1, Contractor Responsibilities
Therefore, surface preparation and welding activities, including anchor welding, fall under the Contractor’s scope of work. The inspector’s role is to verify compliance, not to execute procedures.

NEW QUESTION 45
The air pressure to blast the 1000 g of size graded silicon carbide grain for abrasion resistance test should be

448 KPa (65 PSi)

450 KPa

400 KPa

None of the above

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