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NEW QUESTION # 60
A natural or synthetic mineral theoretically consisting solely of alumina (Al2O3), specific gravity 4.00 - 4.02, melting point 3720?F. (2050? C) Hardness 8.8 is called

• A. Corundum
• B. Mica
• C. Kaolin
• D. None of the above

Answer: A

NEW QUESTION # 61
For fire clay and some high alumina materials, the most commonly used index of refractoriness is known as:

• A. Refractoriness
• B. None of the above
• C. Refractoriness under load
• D. Pyrometric cone equivalent

Answer: D

NEW QUESTION # 62
The selected compression test section of the specimen for the CCs test shall be free from

• A. All of the above
• B. Chipped surfaces
• C. Other obvious defects
• D. cCracks

Answer: A

NEW QUESTION # 63
API 936 documentation should content

• A. Design details
• B. Execution details
• C. All above
• D. Quality standards

Answer: C

NEW QUESTION # 64
Metallic anchor made from rod or bar and usually used for dual layer linings that are configured in

• A. Y shape
• B. U shape
• C. V shape
• D. All of the above

Answer: A

NEW QUESTION # 65
The effective diameter of metal fiber is

• A. 0.2 - 0.3mm
• B. None of the above
• C. 0.3 - 0.6 mm
• D. 0.4 - 0.8mm

Answer: C

NEW QUESTION # 66
Refractories chemically and physically stable at

• A. Average temperatures
• B. None of the above
• C. High temperatures
• D. Low temperatures

Answer: C

NEW QUESTION # 67
The color of stripe for Inconel 600 alloy material of metallic anchor is

• A. None of the above
• B. 2 solid black
• C. 2 solid blue
• D. 1 solid black

Answer: C

NEW QUESTION # 68
Spalling of layers from the hot surface of a refractory lining is called

• A. Crumbling
• B. Erosion
• C. Sheeting
• D. Spalling

Answer: D

NEW QUESTION # 69
The property of matter by virtue of which heat energy is transmitted through particles in contact.

• A. Thermal conductivity
• B. Thermal expansion
• C. Thermal shock
• D. None of the above

Answer: A

NEW QUESTION # 70
An internal component used for the separation of solids from flue or product gas in a fluid coking unit is called

• A. Plenum
• B. Riser of FCU
• C. None of the above
• D. A cyclone

Answer: D

NEW QUESTION # 71
Hex mesh supplied in flexible rolls and ready fit to a curved surfaces is called

• A. Flexmesh
• B. Hexcel
• C. Hexalt anchor
• D. All of the above

Answer: A

NEW QUESTION # 72
Testing frequency for material qualification of refractory for erosion service requires

• A. 2 samples per pallet or more from each production run
• B. 1 sample per pallet or less from each production run
• C. 1 sample per pallet or more from each production run
• D. None of the above

Answer: B

NEW QUESTION # 73
Forms (types) of refractory

• A. Shaped
• B. All above
• C. Unshaped
• D. Refractory (ceramic) fibers

Answer: B

NEW QUESTION # 74
Test panels for pneumatic gunning are inclined above the horizontal at an angle of

• A. 60?
• B. 30?
• C. 45?
• D. None of the above

Answer: C

NEW QUESTION # 75
The test specimen of castable refractory for cold crushing strength shall be

• A. none of the above
• B. 2 in. (51mm) cubes
• C. Cylinders, 2 in. (51mm)in dia. by 2 in.(51 mm) height
• D. a or b

Answer: D

NEW QUESTION # 76
Refractory packing requirements, the weight in the bag, shall not deviate by more than

• A. ± 4%
• B. ±1%
• C. ± 3%
• D. ± 2%

Answer: D

NEW QUESTION # 77
Based on screen analysis the fines (cement, fumed silica, fine alumina) in typical modern castable is

• A. 20 - 30%
• B. 30 - 40%
• C. None of the above
• D. 40 - 50%

Answer: B

NEW QUESTION # 78
The exposure of a material or body to a rapid change in temperature which may have a deleterious effect

• A. Thermal expansion
• B. Thermal conductivity
• C. Thermal shock
• D. None of the above

Answer: C

NEW QUESTION # 79
The functions of refractories include resistance to other destructive influences such as abrasion, pressure, chemical attack, and or rapid changes in temperature is called.

• A. Secondary function
• B. Tertiary function
• C. None of the above
• D. Primary function

Answer: A

NEW QUESTION # 80
The standard test method for abrasion resistance of refractory materials at room temperature is

• A. C 704 - 01
• B. C 133 - 97
• C. C 181 - 91
• D. None of the above

Answer: A

NEW QUESTION # 81
Commercially on calcined basis bauxite must contain at least

• A. 60% alumina
• B. None of the above
• C. 65% fused silica
• D. 65% alumina

Answer: D

NEW QUESTION # 82
Refractory cast into a mock-up may be stripped and visually inspected after a minimum curing of

• A. 24 hrs
• B. 12 hrs
• C. 8 hrs
• D. 16 hrs

Answer: B

NEW QUESTION # 83
A combination of refractory grain and suitable bonding agent that, after the addition of a proper liquid, is generally poured into place to form a refractory shape or structure which becomes rigid because of chemical action is called

• A. ceramic modules
• B. castable
• C. all of the above
• D. mortar

Answer: B

NEW QUESTION # 84
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API-936 (Refractory Personnel) Certification Exam is an internationally recognized certification program designed for individuals who are involved in the installation, inspection, testing, and maintenance of refractory materials used in high-temperature environments. Refractory Personnel certification is offered by the American Petroleum Institute (API), which is a leading industry association that sets standards for the oil and gas industry. The API-936 certification exam tests the knowledge and skills of the individuals in the field of refractory materials and their application in various industrial processes.

 

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