The most commonly used binder for refractory concrete is
A . calcium aluminate cement
B. cements
C. silicates
D. all of the above
Answer: A
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:
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 setting refractories
B. Heat setting refractories
C. Air and heat setting refractory
D. None of the above
Answer: A
In ceramics, the property of resistance to melting, softening, or deformation at high temperature is called.
In ceramics, the property of resistance to melting, softening, or deformation at high temperature is called.
A . Refractoriness
B. Pyrometric cone equivalent
C. Cold crushing strength
D. None of the above
Answer: A
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 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 . Corundum
B. Kaolin
C. Mica
D. None of the above
Answer: C
Refractories chemically and physically stable at
Refractories chemically and physically stable at
A . Low temperatures
B. Average temperatures
C. High temperatures
D. None of the above
Answer: C
The selected compression test section of the specimen for the CCs test shall be free from
The selected compression test section of the specimen for the CCs test shall be free from
A . cCracks
B. Chipped surfaces
C. Other obvious defects
D. All of the above
Answer: D
F. (2050?
A natural or synthetic mineral theoretically consisting solely of alumina (Al2O3), specific gravity 4.00 C 4.02, melting point 3720?
F. (2050? C) Hardness 8.8 is called
A . Corundum
B. Kaolin
C. Mica
D. None of the above
Answer: A
Based on screen analysis the fines (cement, fumed silica, fine alumina) in typical modern castable is
Based on screen analysis the fines (cement, fumed silica, fine alumina) in typical modern castable is
A . 40 C 50%
B. 30 C 40%
C. 20 C 30%
D. None of the above
Answer: B
Alumina C silica refractories containing 45% or more alumina, materials used in their production include diaspore, bauxite, gibbsite, kyanite, sillimanite, alusite, and fused alumina (artificial corundum) is called
Alumina C silica refractories containing 45% or more alumina, materials used in their production include diaspore, bauxite, gibbsite, kyanite, sillimanite, alusite, and fused alumina (artificial corundum) is called
A . fire clay refractory
B. insulating refractories
C. high alumina refractories
D. all of the above
Answer: C
Which function of refractories is to resist temperature?
Which function of refractories is to resist temperature?
A . Primary function
B. Secondary function
C. Tertiary function
D. None of the above
Answer: A