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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
The standard test method for abrasion resistance of refractory materials at room temperature is
- A. C 181 - 91
- B. None of the above
- C. C 704 - 01
- D. C 133 - 97
Answer: C
NEW QUESTION # 38
1 solid black is the color of the stripe for the alloy material
- A. None of the above
- B. 0
- C. 1
- D. 304L
Answer: B
NEW QUESTION # 39
The most common sizes in thickness for hex mesh are
- A. ¾ in or 1" (19mm or 25mm)
- B. (10 - 20mm)
- C. None of the above
- D. (20 - 25mm)
Answer: A
NEW QUESTION # 40
The surface of a refractory section exposed to the source of heat
- A. cold face
- B. None of the above
- C. smooth face
- D. hot face
Answer: D
NEW QUESTION # 41
The destructive chemical reaction between refractories and external agencies at high temperatures, resulting in the formation of a liquid is called
- A. None of the above
- B. Slagging of refractories
- C. Slumping of refractories
- D. Dusting of refractories
Answer: B
NEW QUESTION # 42
The term that describes the condition of pre-set refractory in which gravitational forces cause it to lose its desired shaped is called
- A. None of the above
- B. Bloating
- C. Punky
- D. Slumping
Answer: D
NEW QUESTION # 43
Hex mesh supplied in flexible rolls and ready fit to a curved surfaces is called
- A. Flexmesh
- B. Hexalt anchor
- C. Hexcel
- D. All of the above
Answer: A
NEW QUESTION # 44
Section of transfer line in which flow is in an upward direction is called
- A. Riser of FCCU
- B. None of the above
- C. Cyclone of FCCU
- D. Plenum of FCCU
Answer: A
NEW QUESTION # 45
As installed testing is the terminology for testing refractory that was sampled during installation in order to confirm that they meet specified.
- A. None of the above
- B. Physical property standards
- C. Both as above
- D. Chemical property standards
Answer: B
NEW QUESTION # 46
Refractory failure mechanisms are.
- A. Thermal shock and mechanical abuse
- B. Erosion and corrosion
- C. Overheating and chemical attack
- D. All of the above
Answer: D
NEW QUESTION # 47
Brick, tile, fired shapes and fused cast shapes are
- A. shaped refractory
- B. refractory fiber
- C. all above
- D. unshaped refractory
Answer: A
NEW QUESTION # 48
The color of stripe for 304L alloy material of metallic anchor is
- A. 1 solid grey
- B. None of the above
- C. 2 solid black
- D. 1 solid black
Answer: C
NEW QUESTION # 49
For fire clay and some high alumina materials, the most commonly used index of refractoriness is known as:
- A. None of the above
- B. Refractoriness under load
- C. Refractoriness
- D. Pyrometric cone equivalent
Answer: D
NEW QUESTION # 50
A metallic anchor, usually V-stud which has a foot-shaped configuration at the base to aid weld attachment to the shell is called.
- A. None of the above
- B. Stud weld
- C. Footed anchor
- D. V-anchor
Answer: C
NEW QUESTION # 51
A high alumina mineral usually consists of rounded concretionary grains embedded in clay-like mass and is believed to consist essentially of alumina trihydrate (Al2O3 H2O) and alumina hydrate (Al2O3 H2O) in varying proportions is called
- A. kyanite
- B. fused alumina
- C. bauxite
- D. alusite
Answer: C
NEW QUESTION # 52
Refractories whose major constituent is lime, magnesia, or both and which may react chemically with acid refractories, acid slags, or acid fluxes at a high temperature is known as
- A. None f the above
- B. Natural refractories
- C. Basic refractories
- D. Acid refractories
Answer: C
NEW QUESTION # 53
To compose a sample for the modulus of rupture test from an equivalent number of refractory shapes, the specimen should be
- A. At least three
- B. At least four
- C. At least two
- D. At least five
Answer: D
NEW QUESTION # 54
Gunning test panels are constructed with removable backs as required for
- A. physical property test
- B. None of the above
- C. laboratory test
- D. visual inspection of the castable
Answer: D
NEW QUESTION # 55
Pre-turn around planning means
- A. Any of the above
- B. At least 8 months prior to the turnaround
- C. At least 12 months prior to the turnaround
- D. At least 6 months prior to the turnaround
Answer: D
NEW QUESTION # 56
Based on screen analysis the fines (cement, fumed silica, fine alumina) in typical modern castable is
- A. 40 - 50%
- B. None of the above
- C. 30 - 40%
- D. 20 - 30%
Answer: C
NEW QUESTION # 57
Modulus of rupture test for castable refractories, the test specimen shall be
- A. None of the above
- B. 6 x 2 x 2 in
- C. 9 x 2 x 2 in (228 x 51 x 51mm)
- D. 8 x 2 x 2 in
Answer: C
NEW QUESTION # 58
Fiber concentrations typically range is
- A. Any of the above
- B. 1 - 4 wt percent
- C. 1 - 2 wt percent
- D. 1 - 3 wt percent
Answer: B
NEW QUESTION # 59
The test specimen of castable refractory for cold crushing strength shall be
- A. 2 in. (51mm) cubes
- B. Cylinders, 2 in. (51mm)in dia. by 2 in.(51 mm) height
- C. none of the above
- D. a or b
Answer: D
NEW QUESTION # 60
Based on-screen analysis, the size of Alumina - silicate aggregate in typical modern castable is
- A. 60 - 70%
- B. None of the above
- C. 70 - 8-%
- D. 50 - 60%
Answer: A
NEW QUESTION # 61
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