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NEW QUESTION 22
The surface of a refractory section not exposed to the source of heat
- A. None of the above
- B. Cold face
- C. Hot face
- D. Smooth face
Answer: B
NEW QUESTION 23
The effective diameter of metal fiber is
- A. None of the above
- B. 0.2 - 0.3mm
- C. 0.3 - 0.6 mm
- D. 0.4 - 0.8mm
Answer: C
NEW QUESTION 24
1 solid black is the color of the stripe for the alloy material
- A. None of the above
- B. 304L
- C. 0
- D. 1
Answer: D
NEW QUESTION 25
The terminology for testing refractory that was sampled during installation in order to confirm that they meet specified physical property standards is called
- A. None of the above
- B. Physical property test
- C. Both of the above
- D. As - installed testing
Answer: D
NEW QUESTION 26
The increase in linear dimensions and volume which occurs when materials are heated and which is counterbalanced by contraction of equal amounts when the materials are cooled.
- A. Thermal conductivity
- B. None of the above
- C. Thermal expansion
- D. Thermal shock
Answer: A
NEW QUESTION 27
Mechanical wearing away of the surfaces of refractory bodies in service by washing action of moving liquid or gases is called
- A. None of the above
- B. Spalling of refractories
- C. Erosion of refractories
- D. Crumble of refractories
Answer: C
NEW QUESTION 28
Enclosure inside the top head of a reactor or regenerator vessel which supports the cyclones and in which gases exiting the cyclone outlets are collected is called
- A. None of the above
- B. Riser of FCCU
- C. Plenum of FCCU
- D. Cyclone of FCCU
Answer: C
NEW QUESTION 29
Colour coding does not require for anchor alloy of
- A. None of the above
- B. Carbon steel
- C. SS310
- D. SS304
Answer: B
NEW QUESTION 30
A combination of refractory grain and suitable bonding agent that, after the addition of a proper liquid, is generally poured into place to form a refractory shape or structure which becomes rigid because of chemical action is called
- A. all of the above
- B. mortar
- C. ceramic modules
- D. castable
Answer: D
NEW QUESTION 31
The test specimen of castable refractory for cold crushing strength shall be
- A. a or b
- B. none of the above
- C. 2 in. (51mm) cubes
- D. Cylinders, 2 in. (51mm)in dia. by 2 in.(51 mm) height
Answer: A
NEW QUESTION 32
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. Natural refractories
- B. Acid refractories
- C. Basic refractories
- D. None f the above
Answer: C
NEW QUESTION 33
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. 8 x 2 x 2 in
- D. 9 x 2 x 2 in (228 x 51 x 51mm)
Answer: D
NEW QUESTION 34
A group of rock minerals having nearly perfect cleavage in one direction and consisting of thin elastic plates and the most common varieties are muscovite and biotite is called
- A. None of the above
- B. Mica
- C. Corundum
- D. Kaolin
Answer: B
NEW QUESTION 35
Packing of chemical setting refractories should have mechanical protection by
- A. Any of the above.
- B. Cardboard
- C. Rigid plastic
- D. Metal outside
Answer: A
NEW QUESTION 36
Arrange for testing at either an independent laboratory or the manufacturer's plant is
- A. Owner responsibility
- B. Inspector responsibility
- C. Manufacturer responsibility
- D. Contractor responsibility
Answer: D
NEW QUESTION 37
Metallic anchor made from rod or bar and usually used for dual layer linings that are configured in
- A. V shape
- B. Y shape
- C. U shape
- D. All of the above
Answer: B
NEW QUESTION 38
Fiber concentrations typically range is
- A. 1 - 4 wt percent
- B. 1 - 3 wt percent
- C. Any of the above
- D. 1 - 2 wt percent
Answer: A
NEW QUESTION 39
Additives used to facilitate moisture removal of refractory linings during dry out are called
- A. None of the above
- B. Organic fiber
- C. Mineral fiber
- D. Metal fiber
Answer: B
NEW QUESTION 40
To compose a sample for the CCS test from an equivalent number of refractory shapes the specimen should be
- A. None of the above
- B. At least three
- C. At least five
- D. At least four
Answer: C
NEW QUESTION 41
Heating the new refractory too rapidly will cause
- A. Explosive spalling
- B. None of the above
- C. Chemical attack
- D. Structural deterioration
Answer: A
NEW QUESTION 42
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 43
In ceramics, the property of resistance to melting, softening, or deformation at high temperature is called.
- A. None of the above
- B. Refractoriness
- C. Cold crushing strength
- D. Pyrometric cone equivalent
Answer: B
NEW QUESTION 44
Refractory failure mechanisms are.
- A. Erosion and corrosion
- B. Thermal shock and mechanical abuse
- C. All of the above
- D. Overheating and chemical attack
Answer: C
NEW QUESTION 45
API 936 documentation should content
- A. Quality standards
- B. All above
- C. Execution details
- D. Design details
Answer: B
NEW QUESTION 46
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 47
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