Hollow refractory bricks are made by___________________?
A. Slip casting
B. Hand moulding
C. pressing/machine moulding
D. Extrusion
Refractory Technology
A steel member used in the furnace construction to take the thrust of the brickwork is called___________________?
A steel member used in the furnace construction to take the thrust of the brickwork is called___________________?
A. Buckstay
B. Breast wall
C. Armouring
D. Baffle
Basic bricks are not made of ___________________?
Basic bricks are not made of ___________________?
A. Fireclay
B. Magnesite
C. Forsterite
D. Chromite
Pyrometric cone equivalent (PCE) value (Segar cone) of ‘Superduty refractories’ is more than 33 which corresponds to a temperature of _____________ °C?
Pyrometric cone equivalent (PCE) value (Segar cone) of ‘Superduty refractories’ is more than 33 which corresponds to a temperature of _____________ °C?
A. 1520
B. 1630
C. 1670
D. 1730
High thermal conductivity of a refractory material is not important, when it is to be used in the______________________?
High thermal conductivity of a refractory material is not important, when it is to be used in the______________________?
A. Coke oven regenerators
B. Muffle furnace
C. Blast furnace
D. Recuperators
Magnesite bricks are used in those parts of furnaces, which are __________________?
Magnesite bricks are used in those parts of furnaces, which are __________________?
A. Subjected to temperature fluctuation
B. Required to resist corrosive basic slag
C. Subjected to high load
D. None of these
Fireclay bricks are never used in the______________?
Fireclay bricks are never used in the______________?
A. Beehive oven
B. Coke oven walls
C. Zinc roaster
D. Lead blast furnace
Resistance to slag attack of a refractory _____________________?
Resistance to slag attack of a refractory _____________________?
A. Depends on the nature of slag & refractory
B. Decreases at higher temperature
C. Decreases, if defective joints & cracks exist in the refractory
D. All A., B. and C.
Which is not an alumino-silicate refractory ?
Which is not an alumino-silicate refractory ?
A. Fireclay bricks
B. Mullite bricks
C. Tar dolomite bricks
D. High alumina bricks
An indication of degree of firing in silica brick is its____________________?
An indication of degree of firing in silica brick is its____________________?
A. Specific gravity
B. Fusion point
C. RUL
D. None of these