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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Installation Methods & Procedures | 20% | - Mixing, batching, and placement techniques - Casting, gunning, ramming, hand packing - Anchors and support systems |
| Topic 2: Testing & Inspection | 15% | - ASTM test methods (C113, C133, C704, etc.) - Acceptance/rejection criteria - Sample preparation and testing procedures |
| Topic 3: API STD 936 Core Requirements | 30% | - Documentation and reporting requirements - Roles and responsibilities of personnel - Quality control guidelines |
| Topic 4: Curing, Drying & Post-Installation | 10% | - Dryout and heating protocols - Curing and firing procedures - Defects, repair, and maintenance |
| Topic 5: Refractory Materials & Qualification | 25% | - Types, properties, and specifications - Applicator qualification requirements - Material qualification testing |
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NEW QUESTION # 31
When installing refractory castables in hot weather conditions, which of the following is acceptable? (This may have more than one correct answer; please select all that apply.)
Answer: B,C,D
Explanation:
API TR 980 provides guidance for hot weather installation, recommending:
"Preventive measures include shading material and equipment, cooling of mix water and forms, and in some cases, air conditioning of ambient air. Spraying water on equipment may be used to reduce radiant heat."
- API TR 980, Section 4.5.2
However, decreasing mixing time is not advised; it can result in insufficient material wet-out or inconsistent dispersion. Therefore:
A (air conditioning): Acceptable
B (decreasing mixing time): Not acceptable
C (shading): Acceptable
D (spraying water): Acceptable
NEW QUESTION # 32
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
Answer: A
NEW QUESTION # 33
For the qualification of the applicator/installer, they shall demonstrate their ability to install the refractory:
Answer: B
Explanation:
API 936 clearly states that applicators/installers must be qualified to demonstrate the ability to install refractory linings in accordance with the specified project quality standards. This includes using the correct methods, achieving proper material density, and avoiding defects like voids and laminations.
Reference:API Std 936, Section 4.2 - Installer Qualifications: "Installers shall demonstrate their ability to install the refractory system to meet the specified quality standards prior to beginning production work."
NEW QUESTION # 34
The surface of a refractory section exposed to the source of heat
Answer: B
NEW QUESTION # 35
Cold wall refractory lined components shall be dried out by heating from:
Answer: C
Explanation:
Cold wall refractory systems are typically backed by steel shells, which are poor at withstanding the thermal stresses that come from reverse heating. API 936 and API TR 980 clearly emphasize thatthe heat-up or dryout process for cold-wall linings must always begin from the hot face- that is, the process-exposed surface.
Heating from thehot faceallows for controlled migration of moisture toward the cold face and eventual venting to the atmosphere. Conversely, heating from the cold face or steel shell side traps moisture between the hot impermeable material and the outer surface, leading to:
Steam buildup
Explosive spalling
Cracks in the material or at the interface with the steel
For these reasons,only the hot facemethod is specified unless the design and dryout plan justify a different method under special engineering review.
Reference:
API Std 936, Section 6.5.2: "Dryout shall be performed from the hot face only unless otherwise specified." API TR 980, Section on "Dryout of Cold Wall Systems": Highlights the mechanisms of vapor movement and the risks of reverse heating.
ASTM C1190(Referenced Method): Supports the use of correct drying schedules and methods.
NEW QUESTION # 36
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