1520-1630
1630-1670
> 1730
> 2000
✅ The correct answer is option C.
Refractory Technology MCQs
A steel member used in the furnace construction to take the thrust of the brickwork is called
buckstay
breast wall
armouring
baffle
✅ The correct answer is option A.
Firing temperature is minimum (1250-1400 °C) for __________ bricks.
fireclay
direct bonded basic
silica
magnesite
✅ The correct answer is option A.
‘Super refractories’ are made from pure
carbides
oxides
borides
nitrides
✅ The correct answer is option B.
Semi-silica bricks compared to silica bricks have
less fusion point.
better spalling resistance.
both (a) and (b).
neither (a) not (b).
✅ The correct answer is option C.
Silica bricks are never used for lining the
beehive coke ovens.
by-product coke ovens.
dome of blast furnace stoves.
roof of open hearth furnace.
✅ The correct answer is option A.
Lower part of hot metal mixer are lined with __________ bricks.
superduty fireclay
high alumina
silica
carborundum
✅ The correct answer is option D.
Which is the stable form of silica below 870°C ?
Tridymite
Cristobalite
Quartz
None of these
✅ The correct answer is option C.
__________ bricks are used in the burning zone of a cement rotary kiln.
High alumina
Fireclay
Thoria
Silicon carbide
✅ The correct answer is option A.
Carbon refractories have very high
wetting characteristics
refractoriness
thermal conductivity
both (b) and (c)
✅ The correct answer is option D.