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NEW QUESTION # 25
The application of monolithic refractories by means of air placement guns is
- A. Pouring
- B. Casting
- C. Gunning
- D. Placing
Answer: C
NEW QUESTION # 26
Modulus of rupture test for castable refractories, the test specimen shall be
- A. None of the above
- B. 9 x 2 x 2 in (228 x 51 x 51mm)
- C. 6 x 2 x 2 in
- D. 8 x 2 x 2 in
Answer: B
NEW QUESTION # 27
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. Acid refractories
- C. Natural refecatories
- D. Basic refractories
Answer: B
NEW QUESTION # 28
Castable, gunning mixes, ramming mixes, plastics, and mortars are
- A. Unshaped refractory
- B. All of the above
- C. Refractory fiber
- D. Shaped refractory
Answer: A
NEW QUESTION # 29
The length of metal fiber is
- A. 10 or 15mm
- B. None of the above
- C. 30 or 40mm
- D. 19mm or 25mm
Answer: D
NEW QUESTION # 30
For fire clay and some high alumina materials, the most commonly used index of refractoriness is known as:
- A. Pyrometric cone equivalent
- B. None of the above
- C. Refractoriness under load
- D. Refractoriness
Answer: A
NEW QUESTION # 31
The term that describes the condition of pre-set refractory in which gravitational forces cause it to lose its desired shaped is called
- A. Bloating
- B. None of the above
- C. Punky
- D. Slumping
Answer: D
NEW QUESTION # 32
Fused silica aggregate is used as a raw material in a castable providing
- A. Low thermal conductivity
- B. None of the above
- C. Low thermal conductivity and low thermal expansion
- D. Low thermal expansion
Answer: C
NEW QUESTION # 33
Testing frequency for material qualification of refractory for erosion service requires
- A. 1 sample per pallet or more from each production run
- B. None of the above
- C. 2 samples per pallet or more from each production run
- D. 1 sample per pallet or less from each production run
Answer: D
NEW QUESTION # 34
To compose a sample for the CCS test from an equivalent number of refractory shapes the specimen should be
- A. At least five
- B. None of the above
- C. At least four
- D. At least three
Answer: A
NEW QUESTION # 35
A moldable refractory material that can be extruded and has a level of workability that permits it to be pounded into place to form a monolithic structure
- A. Plastic refractory
- B. Monolithic refractory
- C. None of the above
- D. Ramming mix
Answer: A
NEW QUESTION # 36
Compositions of ground refractory materials which require relatively high temperatures for the development of an adequate bond (commonly called the ceramic bond) is called
- A. none of the above
- B. air and heat setting refractories
- C. air setting refractories
- D. heat setting refractories
Answer: D
NEW QUESTION # 37
As per ASTM C- 704, for the erosion tests, silicon carbide grit is to be used by
- A. None of the above
- B. One time
- C. Three-time
- D. Two time
Answer: B
NEW QUESTION # 38
API 936 documentation should content
- A. All above
- B. Design details
- C. Quality standards
- D. Execution details
Answer: A
NEW QUESTION # 39
The air pressure to blast the 1000 g of size graded silicon carbide grain for abrasion resistance test should be
- A. None of the above
- B. 450 KPa
- C. 448 KPa (65 PSi)
- D. 400 KPa
Answer: C
NEW QUESTION # 40
Section of transfer line in which flow is in a downward direction is called
- A. Standpipe of FCCU
- B. Riser of FCCU
- C. None of the above
- D. Transfer line of FCCU
Answer: A
NEW QUESTION # 41
All the samples for the CCs test must be dried at 220 to 230?C (105 to 110?C) for
- A. 20 hrs (overnight)
- B. 12 hrs (overnight)
- C. 18 hrs (overnight)
- D. 24 hrs (overnight)
Answer: D
NEW QUESTION # 42
The standard size of a fabricated test panel for pneumatic gunning qualification is
- A. (600 mm x 600 mm) 24 " x 24"
- B. None of the above
- C. (700 mm x 700 mm)
- D. (500 mm x 500 mm)
Answer: A
NEW QUESTION # 43
Metallic anchor made from rod or bar and usually used for dual layer linings that are configured in
- A. Y shape
- B. All of the above
- C. V shape
- D. U shape
Answer: A
NEW QUESTION # 44
Based on-screen analysis, the size of Alumina - silicate aggregate in typical modern castable is
- A. 50 - 60%
- B. None of the above
- C. 70 - 8-%
- D. 60 - 70%
Answer: D
NEW QUESTION # 45
Refractories means
- A. Hard to fuse
- B. None of the above
- C. Hart to set
- D. Hard to test
Answer: A
NEW QUESTION # 46
Brick, tile, fired shapes and fused cast shapes are
- A. refractory fiber
- B. shaped refractory
- C. all above
- D. unshaped refractory
Answer: B
NEW QUESTION # 47
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