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NEW QUESTION 10
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 11
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. Acid refractories
- B. Natural refecatories
- C. Basic refractories
- D. None of the above
Answer: A
NEW QUESTION 12
Section of transfer line in which flow is in a downward direction is called
- A. Transfer line of FCCU
- B. Riser of FCCU
- C. None of the above
- D. Standpipe of FCCU
Answer: D
NEW QUESTION 13
Refractories means
- A. Hard to fuse
- B. Hard to test
- C. None of the above
- D. Hart to set
Answer: A
NEW QUESTION 14
Section of transfer line in which flow is in an upward direction is called
- A. Riser of FCCU
- B. Plenum of FCCU
- C. Cyclone of FCCU
- D. None of the above
Answer: A
NEW QUESTION 15
The loss of fragmented refractories from the face of the refractory structure, through cracking and rupturing which results in the exposure of the original inner portion of the refractory lining is called
- A. Erosion
- B. Sheeting
- C. Bypassing
- D. Spalling
Answer: D
NEW QUESTION 16
API 936, the standard test method for abrasion resistance of refractory materials at room temperature is
- A. C 113 - 02
- B. None of the above
- C. C 181 - 91
- D. C 704 - 01
Answer: D
NEW QUESTION 17
The formation of slag takes place by chemical action and fusion at furnace operating temperature in the way of
- A. All of the above
- B. By chemical reaction between refractories and fluxing agents such as coal ash, or between two different types of refractories
- C. In smelting operation, through the combination of a flux, such as limestone, with the gangue or waste portion of the ore
- D. In the refining of metals by substances such as lime added for the purpose of affecting or aiding the refining
Answer: C
NEW QUESTION 18
Castable, gunning mixes, ramming mixes, plastics, and mortars are
- A. Shaped refractory
- B. Refractory fiber
- C. All of the above
- D. Unshaped refractory
Answer: D
NEW QUESTION 19
The effective diameter of metal fiber is
- A. 0.4 - 0.8mm
- B. 0.2 - 0.3mm
- C. 0.3 - 0.6 mm
- D. None of the above
Answer: C
NEW QUESTION 20
As installed testing is the terminology for testing refractory that was sampled during installation in order to confirm that they meet specified.
- A. Physical property standards
- B. Chemical property standards
- C. Both as above
- D. None of the above
Answer: A
NEW QUESTION 21
Colour coding does not require for anchor alloy of
- A. Carbon steel
- B. SS304
- C. SS310
- D. None of the above
Answer: A
NEW QUESTION 22
Materials having refractory properties which form a refractory body when bonded into a conglomerate mass by a matrix is called
- A. Refractory aggregate
- B. Refractory mass
- C. None of the above
- D. Cementitious concrete
Answer: A
NEW QUESTION 23
The destructive chemical reaction between refractories and external agencies at high temperatures, resulting in the formation of a liquid is called
- A. Slagging of refractories
- B. Slumping of refractories
- C. None of the above
- D. Dusting of refractories
Answer: A
NEW QUESTION 24
1 solid black is the color of the stripe for the alloy material
- A. 304L
- B. 0
- C. 1
- D. None of the above
Answer: C
NEW QUESTION 25
A condition describing a refractory lining that is soft and friable
- A. Bloating
- B. Slumping
- C. None of the above
- D. Plunky
Answer: D
NEW QUESTION 26
The selected compression test section of the specimen for the CCs test shall be free from
- A. All of the above
- B. Chipped surfaces
- C. cCracks
- D. Other obvious defects
Answer: A
NEW QUESTION 27
A separation between adjoining parts of a refractory lining that allows small expansive movements, such as those caused by thermal change is known as
- A. Expansion joint
- B. Thermal conductivity
- C. Thermal expansion
- D. None of the above
Answer: A
NEW QUESTION 28
For air-setting phosphate bonded, erosion-resistant refractories mixing, the mixer's paddles, and bowls shall be
- A. Carbon
- B. Aluminium
- C. Steel
- D. None of the above
Answer: C
NEW QUESTION 29
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