API-936認定の有効な試験問題集解答学習ガイド！（最新の87問題)
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API 936試験では、耐火性材料とその用途に関連する幅広いトピックをカバーしています。この試験には、難治性の特性と行動、設置技術、検査とテストの方法、修理および保守手順などのトピックに関する質問が含まれています。この試験では、個人用保護具の使用や耐火物の安全な取り扱いと廃棄など、安全性の考慮事項もカバーしています。
API-936認証試験は、設置、検査、テスト、修理、メンテナンスなど、耐火物に関連する幅広いトピックをカバーしています。この試験では、耐火物の選択、設計、およびアプリケーションに関連するトピックもカバーしています。 API-936認定試験の正常な完了は、個人が耐火産業で効果的に働くために必要な知識とスキルを持っていることを示しています。この認定は、世界中の業界の専門家や雇用主によって、この分野の卓越性の印として認識されています。
質問 # 52
The vessel in which coke and residual hydrocarbons are burned off the catalyst and the flue gas is then separated from the catalyst is called
- A. None of the above
- B. Regenerator of FCCU
- C. Reactor of FCCU
- D. Cyclones of FCCU
正解：B
質問 # 53
Which factors must be the same when retesting a sample that fails to meet specification?
正解：
解説：
Explanation:
Pallet
Batch
Testing Procedure
Sample
When a sample fails to meet the required specifications in accordance with API Std 936, any retesting must maintain strict consistency with the original conditions to ensure validity and comparability of results.
API 936 states:
"If a sample fails to meet any requirement, resampling shall be permitted. However, retesting shall be performed using specimens from the same batch, pallet, and sample as the original test. The same testing procedure must be used."
- API Std 936, Section 6.2.3
Explanation of Matching Terms:
Pallet: To ensure material consistency.
Batch: Revalidates results without introducing variability from a new production lot.
Testing Procedure: Methodology must not change to avoid skewed comparison.
Sample: Must be the original sample to confirm initial findings.
Therefore, all of these factors must remain the same. The only item in your provided list that is not required to match is "Inspection methods" - it is not part of the retesting condition clause.
質問 # 54
Which of the following is the appropriate term for testing refractory that was sampled during project site installation in order to confirm that it meets specified physical property standards?
- A. Visual testing
- B. Pre-qualification testing
- C. Hammer testing
- D. As-installed testing
正解：D
解説：
API 936 defines different testing phases for monolithic refractories. As-installed testing refers specifically to the testing of materials that have been installed and cured on site:
"As-installed testing is performed on specimens sampled from the job site and subjected to prescribed laboratory testing to confirm compliance with physical property specifications."
- API Std 936, Section 6.4.7
This is distinct from:
Pre-qualification testing (done before installation),
Hammer testing (a nondestructive field check), and
Visual testing (a general inspection technique).
Thus, the correct term is Option C - As-installed testing.
質問 # 55
When water is used for refractory installed on a carbon steel surface with a stainless steel anchorage, the chloride content of the potable water shall not exceed:
- A. 250 ppm
- B. 200 ppm
- C. 50 ppm
- D. 100 ppm
正解：C
解説：
According to API Standard 936, water used in the preparation of refractory mixes is subject to quality limitations, especially when stainless steel anchors are embedded in or come into contact with the refractory that is installed on a carbon steel surface. High chloride concentrations in the mixing water may promote corrosion in stainless steel anchoring systems.
API 936 explicitly states:
"When water is used for refractory installed on a carbon steel surface with a stainless steel anchorage, the chloride content of the potable water shall not exceed 50 ppm."
- API Std 936, Section 5.1.2
This clause is intended to protect the integrity of stainless steel anchors from chloride-induced stress corrosion cracking or pitting, which can compromise the mechanical support of the refractory lining.
Therefore, Option A (50 ppm) is the only correct and code-compliant answer.
質問 # 56
The test specimen of castable refractory for cold crushing strength shall be
- A. Cylinders, 2 in. (51mm)in dia. by 2 in.(51 mm) height
- B. 2 in. (51mm) cubes
- C. none of the above
- D. a or b
正解：D
質問 # 57
Refractories containing a substantial amount of silica which is reactive with basic refractories, basic slags, or basic fluxes at high temperatures are known as
- A. None of the above
- B. Basic refractories
- C. Natural refecatories
- D. Acid refractories
正解：D
質問 # 58
Heating the new refractory too rapidly will cause
- A. None of the above
- B. Chemical attack
- C. Structural deterioration
- D. Explosive spalling
正解：D
質問 # 59
A group of impure magnesium silicate minerals that occur in a fiberous form is known as
- A. None of the above
- B. Asbestos
- C. Fused silica
- D. Mineral fibre
正解：B
質問 # 60
As per ASTM C- 704, for the erosion tests, silicon carbide grit is to be used by
- A. None of the above
- B. Three-time
- C. Two time
- D. One time
正解：D
質問 # 61
Ceramic fiber batten strips shall be:
- A. the same grade as hot face material.
- B. anchored with staples.
- C. a maximum length 3 ft (0.9 m).
- D. anchored with Lock Studs.
正解：C
解説：
According to API 936, ceramic fiber batten strips are used in fiber lining applications to secure joints or protect against gas penetration. The specification sets a strict requirement on their length:
"Ceramic fiber batten strips shall be a maximum length of 3 ft (0.9 m)."
- API Std 936, Section 5.3.2.3
Other anchoring methods such as lock studs or staples may apply in different contexts or materials, but they are not prescribed for ceramic fiber batten strips per this specific requirement.
質問 # 62
Refractories chemically and physically stable at
- A. Low temperatures
- B. None of the above
- C. High temperatures
- D. Average temperatures
正解：C
質問 # 63
Fiber concentrations typically range is
- A. 1 - 3 wt percent
- B. 1 - 2 wt percent
- C. Any of the above
- D. 1 - 4 wt percent
正解：D
質問 # 64
Colour coding does not require for anchor alloy of
- A. None of the above
- B. SS310
- C. SS304
- D. Carbon steel
正解：D
質問 # 65
The most common sizes in thickness for hex mesh are
- A. None of the above
- B. (10 - 20mm)
- C. ¾ in or 1" (19mm or 25mm)
- D. (20 - 25mm)
正解：C
質問 # 66
A refractory materials, stiffer than plastic, that cannot be extruded but has suitable properties to permit ramming into place to form a monolithic structure
- A. Ramming mix
- B. None of the above
- C. Plastic refractory
- D. Monolithic refractory
正解：A
質問 # 67
Which of the following is false per the requirements of API Standard 936?
- A. Cold crush strength is determined using two 4-1/2 in. (144 mm) × 4-1/2 in. (114 mm) × 4-1/2 in. (114 mm) cubes.
- B. Permanent linear change is determined with one 2 in. (50 mm) × 2 in. (50 mm) × 9 in. (230 mm) specimen.
- C. Abrasion resistance is determined using two 4-1/2 in. (114 mm) × 4-1/2 in. (144 mm) × 1 in. (25 mm) specimens.
- D. Density shall be determined using cubes or erosion plates and linear change bars.
正解：A
解説：
According to API Standard 936, the correct specimen dimensions for cold crush strength testing are:
"Test specimens for cold crushing strength shall be2 in. (50 mm) cubesamples prepared in accordance with ASTM C133."
-API Std 936, Section 6.4.2
This directly invalidates option A, which incorrectly states the specimen size as 4-1/2 inches.
For the other options:
Option B - Density determination:
API 936 states that density shall be measured using the same specimens used for linear change and abrasion resistance:
"Bulk density shall be determined using the same specimens prepared for the linear change and abrasion resistance tests."
-API Std 936, Section 6.4.3
"These specimens include cubes, linear change bars, and erosion plates."
-Appendix A, API Std 936
Option C - Abrasion resistance specimen size:
"Two 4-1/2 in. × 4-1/2 in. × 1 in. (114 mm × 114 mm × 25 mm) specimens shall be prepared for abrasion resistance testing."
-API Std 936, Section 6.4.4
Option D - Permanent linear change specimen size:
"Permanent linear change (PLC) is determined with a bar 2 in. × 2 in. × 9 in. (50 mm × 50 mm × 230 mm) cast in steel molds."
-API Std 936, Section 6.4.1
Therefore, Option A is the only false statement.
質問 # 68
The vessel in which the cracking reaction occurs or is completed, and in which the product gases are separated from coke and/or catalyst particulate, is the:
- A. regenerator.
- B. stripper.
- C. stand pipe.
- D. reactor.
正解：D
解説：
This definition is rooted in petroleum refining terminology used in the context of fluid catalytic cracking (FCC) units:
"Reactor: The vessel in which the cracking reaction occurs or is completed and in which the product gases are separated from coke and/or catalyst particulate."
- API Std 936, Definitions, Section 3
Option B is the correct term describing this component. A stripper removes volatiles, a regenerator burns off coke from spent catalyst, and a standpipe is used for catalyst transport-not for the cracking reaction itself.
質問 # 69
What is the ASTM test designation for cold crush strength?
- A. C-704
- B. C-133
- C. C-417
- D. C-113
正解：B
解説：
The correct ASTM designation for testingcold crushing strength (CCS)of refractory materials isASTM C133.
This test determines the load at which a sample fails under compressive stress and is essential for assessing the structural integrity of castable and formed refractories.
ASTM C113 relates to permanent linear change.
ASTM C704 is for abrasion resistance.
ASTM C417 is not related to CCS in this context.
Reference:
API Std 936 references ASTM C133 as the governing method for determining cold crushing strength of refractory samples.
Also validated in API TR 978 -Monolithic Refractories: Properties and Selection
質問 # 70
The contractor on a field vibration casting job is preparing for a continuous pour that will last for three 12- hour shifts. The weather report predicts a nighttime low temperature of 35°F (2°C). How should the contractor be prepared?
- A. Have the castable dry mix heated to >50°F (10°C)
- B. Be ready to stop pouring if the temperature drops below 35°F (2°C)
- C. Make no special preparations
- D. Keep the install material and shell >50°F (10°C)
正解：D
解説：
API TR 980 explicitly defines the minimum temperature requirements for castable installation:
"Installation should not proceed if the ambient temperature, substrate temperature, or material temperature is below 50°F (10°C). The material and substrate must be maintained at or above this temperature throughout the placement and curing process."
- TR 980, Section 4.5.1 Cold Weather Installation
Therefore:
Option D is correct as it meets the standard.
Option A is partially correct but does not include the shell or ambient temperature.
Option B is incorrect-work should not start if temperature cannot be maintained.
Option C is incorrect and contradicts API guidance.
質問 # 71
A high alumina mineral usually consists of rounded concretionary grains embedded in clay-like mass and is believed to consist essentially of alumina trihydrate (Al2O3 H2O) and alumina hydrate (Al2O3 H2O) in varying proportions is called
- A. bauxite
- B. fused alumina
- C. kyanite
- D. alusite
正解：A
質問 # 72
A typical example of hexalt anchor is
- A. Hexcel
- B. S-bar
- C. All of the above
- D. Curl and Tacko anchors
正解：C
質問 # 73
Refractory lined pipe used for the transport of hot particulate medium and gases between process vessels is called
- A. Transfer line of FCCU
- B. None of the above
- C. Fractionator of FCCU
- D. Standpipe of FCCU
正解：A
質問 # 74
API 936 documentation should content
- A. Execution details
- B. Quality standards
- C. Design details
- D. All above
正解：D
質問 # 75
Gunning test panels are constructed with removable back panels:
- A. because removal back panels make the reclaiming of anchors easier.
- B. to facilitate the determination of the green-to-fired weight of the castable required for compliance.
- C. because a mechanical inspection by hammer test is required.
- D. to allow inspection for voids and lamination in the castable.
正解：D
解説：
Removable back panels in gunning test panels are requiredto allow inspection for internal defects, particularlyvoids, laminations, and rebound pocketsthat are not visible from the surface. These panels are taken off after gunning so that the interface between layers or the entire cross-section can be visually examined.
This approach ensures that the test section is representative of actual field performance and that the gunning technique (angle, nozzle distance, rebound control) is achieving full compaction without defects.
Reference:
API Std 936, Section 5.2.4 - "Test panels shall include removable back panels to permit inspection of the hot face for voids, laminations, and other defects."
質問 # 76
Test panels for pneumatic gunning are inclined above the horizontal at an angle of
- A. None of the above
- B. 45?
- C. 30?
- D. 60?
正解：B
質問 # 77
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API-936（耐火物担当者）認定試験は、耐火物、設置、検査、修理技術の包括的な理解を提供するグローバルに認められた認定プログラムです。この認定は、石油化学、化学、および精製産業で働く耐火担当者の知識とスキルを評価するように設計されています。この試験では、耐火物、設置、検査、テスト、修理方法など、さまざまなトピックをカバーしています。
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