[2025年最新] 最高のAPI-936試験問題集を使って- 実際の試験問題と解答を解こう
テストエンジンを練習してAPI-936テスト問題
質問 # 23
Refractory cast into a mock-up may be stripped and visually inspected after a minimum curing of
- A. 8 hrs
- B. 12 hrs
- C. 16 hrs
- D. 24 hrs
正解：B
質問 # 24
Selection, installation, inspection, and testing of anchors shall be in accordance with:
- A. contractor's QA/QC department
- B. drawing and specifications
- C. API RP 577
- D. welding code
正解：B
解説：
API 936 clearly stipulates that the selection, installation, inspection, and testing of anchors must comply with theproject's drawings and specifications. These documents define anchor spacing, type, material, orientation, and welding requirements, which must be followed during construction and QA processes.
API 936 does not defer this responsibility to external documents like API RP 577 or welding codes unless explicitly referenced in the project specifications. QA/QC departments may oversee adherence, but do not define the criteria themselves.
Reference:API Std 936, Section 5.3 - Anchor System Requirements: "Anchor installation shall be in accordance with the project drawings and specifications."
質問 # 25
A group of impure magnesium silicate minerals that occur in a fiberous form is known as
- A. Fused silica
- B. None of the above
- C. Mineral fibre
- D. Asbestos
正解：D
質問 # 26
In accordance with TR 980, when curing a high-purity, low-cement castable for a high-temperature unit, which of the following sequences ensures minimum cracking risk?
- A. Accelerated drying using forced air at 400°F for 12 hours
- B. Dryout using open flame burners after form removal
- C. Steam curing for 48 hours followed by firing at 1500°F
- D. Air curing for 24 hours, followed by controlled heating ramp of 50°F/h up to 600°F
正解：D
解説：
TR 980 outlines curing and dryout best practices for monolithic refractories. For high-purity low-cement castables, gradual heat-up is necessary to avoid thermal shock and cracking:
"A minimum 24-hour air cure at ambient temperature should be followed by a controlled dryout ramp not exceeding 50°F (28°C) per hour up to 600°F (316°C)."
- TR 980, Section 6.4.2
質問 # 27
The formation of slag takes place by chemical action and fusion at furnace operating temperature in the way of
- A. In smelting operation, through the combination of a flux, such as limestone, with the gangue or waste portion of the ore
- B. By chemical reaction between refractories and fluxing agents such as coal ash, or between two different types of refractories
- C. All of the above
- D. In the refining of metals by substances such as lime added for the purpose of affecting or aiding the refining
正解：A
質問 # 28
API 936 documentation should content
- A. Design details
- B. Quality standards
- C. All above
- D. Execution details
正解：C
質問 # 29
Based on screen analysis the fines (cement, fumed silica, fine alumina) in typical modern castable is
- A. 40 - 50%
- B. 20 - 30%
- C. 30 - 40%
- D. None of the above
正解：C
質問 # 30
When is metal fiber reinforcement used in castable refractory?
- A. For all monolithic hot face castable refractory materials
- B. Only when specified by the owner
- C. Only when added in the field
- D. Only when extra strength is required
正解：B
解説：
Metal fiber reinforcement isnot a universal requirementfor all castables; it isused only when explicitly specifiedby theowneror design engineer based on the thermal and mechanical service conditions. Fibers are typically added to enhance resistance to thermal shock, spalling, or dynamic loads, particularly in cyclic or erosive environments like FCCU risers.
API 936 requires adherence to project specifications, and unless the use of fiber reinforcement isclearly indicated in the job specifications, it is not assumed or automatically added.
Reference:
API Std 936, Clause on Material Design and Job Specifications: "Metal fiber reinforced castables shall be used only where required by the job specifications." API TR 980, "Use of Fiber-Reinforced Castables," states: "Fiber reinforcement is not intrinsic to all castables and shall be used only when required by design."
質問 # 31
Which of the following does not apply to cold crushing strength (CCS)?
- A. CCS shall be determined on samples that have been fired to 1500°F (815°C)
- B. Testing shall be in accordance with ASTM C1113
- C. The loading head of the testing machine shall have a spherical bearing block
- D. Density of sample affects testing loading rate
正解：B
解説：
Cold crushing strength testing must conform to ASTM C133, not C1113. ASTM C1113 applies to thermal conductivity measurements using hot-wire techniques, not compressive strength.
"CCS shall be determined in accordance with ASTM C133. The loading surface of the test machine shall be a steel bearing block with a spherical bearing surface."
- API Std 936, Section 6.4.2
Thus:
A is correct (density can affect rate of loading).
B is incorrect, making it the correct answer.
C and D are correct per standard testing procedures.
質問 # 32
Which of the following statements regarding curing of hydraulic bonded castables is true?
- A. The membrane curing compound shall burn off at a temperature not less than 500°F (260°C)
- B. Apply a manufacturer approved membrane-type curing compound before the surface is dry to the touch
- C. After remaining in place for 24 hours, forms shall be removed and a curing compound applied within 1 hour of form removal
- D. No part of the lining shall be allowed to air dry more than 3 hours before application of a curing compound
正解：D
解説：
Hydraulic bonded castables, such as those using calcium aluminate cement, cure through ahydration reactionthat requires the presence of water. Premature drying due to wind, sun, or heat can halt the hydration process, weaken the structure, and cause surface cracking. API 936 mandates thatno part of the exposed surface of the castable shall be allowed to dry more than 3 hoursbefore a membrane curing compound is applied.
This statement ensures:
Retention of sufficient surface moisture for ongoing hydration.
Prevention of microcracking, which can later act as stress risers during service.
Uniform strength development across the lining.
The curing compound forms a film that limits evaporation, allowing for continued hydration over the next 24-
48 hours.
Reference:
API Std 936, Section 6.3.2: "No portion of the exposed surface shall be allowed to dry more than 3 h prior to the application of the curing compound." ASTM C309(Referenced Standard): Specifies the performance requirements for curing compounds used in cement-based materials.
質問 # 33
Who is responsible for the accuracy of installation records?
- A. contractor
- B. inspector
- C. refractory manufacturer
- D. owner
正解：A
解説：
API 936 clearly designates responsibility for records:
"The contractor shall maintain records to document installation parameters and results. These records shall be complete, legible, and available for review."
- API Std 936, Section 9.3
The inspector may verify the accuracy but is not accountable for creating or maintaining them. Thus, Option C is correct.
質問 # 34
What abrading media is required in the ASTM C-704 abrasion-resistant test?
- A. Silicon carbide
- B. Alumina grit
- C. FCCU catalyst
- D. Silicon nitride
正解：A
解説：
ASTM C704 specifiessilicon carbideas the standard abrasive media used in the abrasion resistance test for refractories. This test simulates service wear caused by mechanical erosion (e.g., in FCC units). Silicon carbide is used because of its consistent hardness, angularity, and wear characteristics that represent severe operational conditions.
Reference:
API Std 936 references ASTM C704 for erosion-resistant testing and confirms silicon carbide as the specified media.
API TR 977 also documents improvements to test reproducibility with silicon carbide use
質問 # 35
Heating the new refractory too rapidly will cause
- A. Explosive spalling
- B. Structural deterioration
- C. Chemical attack
- D. None of the above
正解：A
質問 # 36
Commercially on calcined basis bauxite must contain at least
- A. 65% alumina
- B. 60% alumina
- C. 65% fused silica
- D. None of the above
正解：A
質問 # 37
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. dimensions are greater than 18 in. (450 mm) * 18 in. (450 mm) * 4 in. (100 mm)
- C. samples are cut with an abrasive medium
- D. samples are cut from the edge of the panels
正解：B
解説：
API 936 allows for the use oftest panels with enclosed sidesinstead of mesh basketswhen the dimensions exceed 18 in. x 18 in. x 4 in.This substitution provides adequate confinement and stability for larger samples during casting and curing, helping maintain uniformity and representative test integrity.
Wire mesh baskets are typically preferred for smaller, lighter samples, but for larger mock-ups or when vibration is involved, fully enclosed forms prevent edge erosion and deformation during casting and handling.
Reference:
API Std 936, Section 7.3.1.1 - "For samples greater than 18 in. × 18 in. × 4 in. (450 mm × 450 mm × 100 mm), solid-sided molds may be used instead of wire mesh baskets."
質問 # 38
Applicator qualification for plastic thick layer, the test panel with an applied lining thickness and anchorage shall be
- A. 600mm x 300 mm (24" x 12")
- B. 500 x 500 mm
- C. None of the above
- D. 300 x 300 mm
正解：A
質問 # 39
The vessel in which cracking reaction occurs or is completed and product gases are separated from coke and/or catalyst particulate is called
- A. Reactor of FCCU
- B. Regenerator of FCCU
- C. None of the above
- D. Cyclones of FCCU
正解：A
質問 # 40
The increase in linear dimensions and volume which occurs when materials are heated and which is counterbalanced by contraction of equal amounts when the materials are cooled.
- A. Thermal shock
- B. Thermal conductivity
- C. Thermal expansion
- D. None of the above
正解：B
質問 # 41
The color of stripe for 304L alloy material of metallic anchor is
- A. 1 solid black
- B. 2 solid black
- C. 1 solid grey
- D. None of the above
正解：B
質問 # 42
Who is responsible to provide details of metal fiber reinforcement including dimensions, concentration, type and metallurgy?
- A. Inspector
- B. Manufacturer
- C. Contractor
- D. Owner
正解：B
解説：
The manufactureris responsible for specifying the exactdimensions, type, concentration, and metallurgical propertiesof metal fiber reinforcement in castable refractories. These fibers are often integral to the formulation and performance of the material and are introduced during manufacturing (not field mixing), with characteristics tailored to improve thermal shock resistance and crack propagation control.
API 936 defers to the manufacturer's technical data for the design and quality control of any material component, including reinforcement. The contractor is responsible for verifying that materials match the manufacturer's documented specification.
Reference:
API Std 936, Section on "Material Submittals" and "Manufacturer's Technical Datasheets" API TR 978, Section on "Metallic Reinforcement in Monolithics" indicates that fiber specs are a manufacturer responsibility
質問 # 43
As-installed gunned test specimens are prepared by cutting specimens with a:
- A. portable rescue saw
- B. trowel
- C. band saw
- D. diamond saw
正解：D
解説：
In API 936, it is specified that as-installed specimens of gunned refractory linings are to be cut from the installation using adiamond saw. This ensures precision and avoids thermal or mechanical damage to the specimen, which could otherwise alter the properties being tested such as density or strength.
This practice is consistent with ASTM standards (e.g., ASTM C133, ASTM C704) referenced in API 936 for the preparation of physical specimens.
Reference:API Std 936, Section 6.4.4 - "Cutting of test specimens shall be performed using a water-cooled diamond saw to avoid thermal damage."
質問 # 44
Brick, tile, fired shapes and fused cast shapes are
- A. shaped refractory
- B. unshaped refractory
- C. all above
- D. refractory fiber
正解：A
質問 # 45
The best definition for creep is:
- A. cracking caused by thermal shock.
- B. deformation due to continuous load over time.
- C. shrinkage at high temperatures.
- D. an increase in expansion at high temperatures.
正解：B
解説：
Creepin refractories is the slow, time-dependentdeformation of a material under constant stressand high temperature. It is critical in applications like reformers and furnaces where the refractory is under load for extended periods. The amount of deformation is typically measured over 50-100 hours in standardized tests such as ASTM C832.
Creep is not the same as thermal expansion (which is reversible), or cracking (a sudden failure).
Reference:
API TR 981 -Thermal Expansion Under Load and Creep of Refractories, defines creep as deformation due to a sustained load over time under high temperatures
質問 # 46
Compositions of ground refractory materials develop a strong bond at air ambient temperatures by virtue of chemical reactions within the binder phase that is usually activated by water additions. These refractories include cement and phosphate bonded castables is called:
- A. Air and heat setting refractory
- B. Heat setting refractories
- C. Air setting refractories
- D. None of the above
正解：C
質問 # 47
Colour coding does not require for anchor alloy of
- A. SS310
- B. Carbon steel
- C. None of the above
- D. SS304
正解：B
質問 # 48
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