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NEW QUESTION 35
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. 18 hrs (overnight)
- C. 24 hrs (overnight)
- D. 12 hrs (overnight)
Answer: C
NEW QUESTION 36
Refractories that are resistant to chemical attack by both acid and basic slags, refractories, or fluxes at high temperature is
- A. Neutral
- B. Acid
- C. None of the above
- D. Basic
Answer: A
NEW QUESTION 37
Additives used to facilitate moisture removal of refractory linings during dry out are called
- A. Metal fiber
- B. Mineral fiber
- C. Organic fiber
- D. None of the above
Answer: C
NEW QUESTION 38
A condition describing a refractory lining that is soft and friable
- A. Plunky
- B. Bloating
- C. None of the above
- D. Slumping
Answer: A
NEW QUESTION 39
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. Cyclones of FCCU
- B. Reactor of FCCU
- C. None of the above
- D. Regenerator of FCCU
Answer: D
NEW QUESTION 40
Fused silica aggregate is used as a raw material in a castable providing
- A. Low thermal conductivity
- B. Low thermal conductivity and low thermal expansion
- C. None of the above
- D. Low thermal expansion
Answer: B
NEW QUESTION 41
Testing frequency for material qualification of refractory for other services requires
- A. 1 sample per 3 pallets or more from each production run
- B. 1 sample per 3 pallets or less from each production run
- C. None of the above
- D. 1 sample per pallet or less from each production run
Answer: B
NEW QUESTION 42
The color of stripe for Inconel 600 alloy material of metallic anchor is
- A. 1 solid black
- B. 2 solid blue
- C. None of the above
- D. 2 solid black
Answer: B
NEW QUESTION 43
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. Cementitious concrete
- D. None of the above
Answer: A
NEW QUESTION 44
Test panels for pneumatic gunning are inclined above the horizontal at an angle of
- A. None of the above
- B. 60?
- C. 30?
- D. 45?
Answer: D
NEW QUESTION 45
Fiber concentrations typically range is
- A. 1 - 4 wt percent
- B. 1 - 2 wt percent
- C. Any of the above
- D. 1 - 3 wt percent
Answer: A
NEW QUESTION 46
Compositions of ground refractory materials develop a strong bond at air ambient temperatures by virtue of chemical reactions within the binder phase that is usually activated by water additions. These refractories include cement and phosphate bonded castables is called:
- A. Air and heat setting refractory
- B. Air setting refractories
- C. None of the above
- D. Heat setting refractories
Answer: B
NEW QUESTION 47
Based on-screen analysis, the size of Alumina - silicate aggregate in typical modern castable is
- A. 50 - 60%
- B. 60 - 70%
- C. 70 - 8-%
- D. None of the above
Answer: B
NEW QUESTION 48
Metallic anchor made from rod or bar and usually used for dual layer linings that are configured in
- A. All of the above
- B. Y shape
- C. U shape
- D. V shape
Answer: B
NEW QUESTION 49
For air-setting phosphate bonded, erosion-resistant refractories mixing, the mixer's paddles, and bowls shall be
- A. Steel
- B. Aluminium
- C. None of the above
- D. Carbon
Answer: A
NEW QUESTION 50
Applicator qualification for plastic thick layer, the test panel with an applied lining thickness and anchorage shall be
- A. 500 x 500 mm
- B. 300 x 300 mm
- C. 600mm x 300 mm (24" x 12")
- D. None of the above
Answer: C
NEW QUESTION 51
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