A. Silica bricks
B. Fireclay bricks
C. Both A. & B.
D. Neither A. nor B.
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Related Mcqs:
- Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to__________________?
A. Thermal spalling
B. Slag attack
C. Fusion under load
D. CO attack - ______________ bricks are used in the burning zone of a cement rotary kiln ?
A. High alumina
B. Fireclay
C. Thoria
D. Silicon carbide - Machine moulding of dry mixture of refractories requires a pressure of the order of _____________ kg/cm2?
A. 10
B. 100
C. 500
D. 1000 - Ferromagnetic ceramic material is not used in the__________________?
A. Thermal insulation
B. Transformers
C. Magnetic switches
D. Television sets - Mixing of ground refractory material and water is done in a ______________ mill?
A. Pug
B. Ball
C. Tube
D. Rod - Refractories are dried in the _______________?
A. Rotary kilns
B. Tunnel kilns
C. Sun
D. None of these - Chemically, mullite refractories is____________________?
A. 3Al2O3.2SiO2
B. Al2O3
C. ZrSO4
D. ThO2 - Periclase refractory contains mainly________________?
A. CaO
B. MgO
C. Al2O3
D. SiO2 - Maximum safe working temperature for fireclay bricks is about __________ °C?
A. 1150
B. 1300
C. 1450
D. 1550 - Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as _____________ percent?
A. 55
B. 70
C. 80
D. 90
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