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NEW QUESTION # 55
The formation of slag takes place by chemical action and fusion at furnace operating temperature in the way of
- A. In the refining of metals by substances such as lime added for the purpose of affecting or aiding the refining
- B. All of the above
- C. By chemical reaction between refractories and fluxing agents such as coal ash, or between two different types of refractories
- D. In smelting operation, through the combination of a flux, such as limestone, with the gangue or waste portion of the ore
Answer: D
NEW QUESTION # 56
Gunning test panels are constructed with removable backs as required for
- A. visual inspection of the castable
- B. None of the above
- C. physical property test
- D. laboratory test
Answer: A
NEW QUESTION # 57
As per API recommended practice 936, the standard test method for reheat change of refractory brick is
- A. C113 - 02
- B. C 133 - 97
- C. None of the above
- D. C 181 - 91
Answer: A
NEW QUESTION # 58
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. None of the above
- C. Primary function
- D. Tertiary function
Answer: A
NEW QUESTION # 59
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. Reactor of FCCU
- B. Regenerator of FCCU
- C. Cyclones of FCCU
- D. None of the above
Answer: B
NEW QUESTION # 60
Mechanical wearing away of the surfaces of refractory bodies in service by washing action of moving liquid or gases is called
- A. Erosion of refractories
- B. Crumble of refractories
- C. None of the above
- D. Spalling of refractories
Answer: A
NEW QUESTION # 61
Colour coding does not require for anchor alloy of
- A. SS304
- B. SS310
- C. None of the above
- D. Carbon steel
Answer: D
NEW QUESTION # 62
The standard test method for abrasion resistance of refractory materials at room temperature is
- A. C 704 - 01
- B. C 133 - 97
- C. None of the above
- D. C 181 - 91
Answer: A
NEW QUESTION # 63
Refractories means
- A. Hard to fuse
- B. Hart to set
- C. None of the above
- D. Hard to test
Answer: A
NEW QUESTION # 64
Fiber concentrations typically range is
- A. 1 - 3 wt percent
- B. Any of the above
- C. 1 - 4 wt percent
- D. 1 - 2 wt percent
Answer: C
NEW QUESTION # 65
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 # 66
Testing frequency for material qualification of refractory for other services requires
- A. 1 sample per pallet or less from each production run
- B. 1 sample per 3 pallets or more from each production run
- C. 1 sample per 3 pallets or less from each production run
- D. None of the above
Answer: C
NEW QUESTION # 67
Additives used to facilitate moisture removal of refractory linings during dry out are called
- A. Mineral fiber
- B. Organic fiber
- C. None of the above
- D. Metal fiber
Answer: B
NEW QUESTION # 68
API 936, the standard test method for abrasion resistance of refractory materials at room temperature is
- A. C 704 - 01
- B. None of the above
- C. C 113 - 02
- D. C 181 - 91
Answer: A
NEW QUESTION # 69
Materials having refractory properties which form a refractory body when bonded into a conglomerate mass by a matrix is called
- A. Refractory mass
- B. None of the above
- C. Cementitious concrete
- D. Refractory aggregate
Answer: D
NEW QUESTION # 70
The color of stripe for 304L alloy material of metallic anchor is
- A. 2 solid black
- B. 1 solid black
- C. None of the above
- D. 1 solid grey
Answer: A
NEW QUESTION # 71
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. Ramming mix
- B. Plastic refractory
- C. None of the above
- D. Monolithic refractory
Answer: B
NEW QUESTION # 72
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. Plastic refractory
- C. None of the above
- D. Monolithic refractory
Answer: A
NEW QUESTION # 73
Forms (types) of refractory
- A. Shaped
- B. Refractory (ceramic) fibers
- C. All above
- D. Unshaped
Answer: C
NEW QUESTION # 74
For fire clay and some high alumina materials, the most commonly used index of refractoriness is known as:
- A. Refractoriness under load
- B. Pyrometric cone equivalent
- C. None of the above
- D. Refractoriness
Answer: B
NEW QUESTION # 75
A metallic anchor made from rod or bar stock that is configured in a V-shape is called
- A. Footed anchor
- B. Stud wed
- C. V-anchor
- D. None of the above
Answer: C
NEW QUESTION # 76
For air-setting phosphate bonded, erosion-resistant refractories mixing, the mixer's paddles, and bowls shall be
- A. Steel
- B. Carbon
- C. Aluminium
- D. None of the above
Answer: A
NEW QUESTION # 77
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. Basic refractories
- B. Acid refractories
- C. None of the above
- D. Natural refecatories
Answer: B
NEW QUESTION # 78
Blanket, Module, Bulk paper, rope, and vacuum formed shaped are:
- A. All of the above
- B. Shaped refractory
- C. Unshaped refractory
- D. Refractory fibers
Answer: D
NEW QUESTION # 79
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