density
specific heat
thermal conductivity
none of these
✅ The correct answer is option C.
Refractory Technology MCQs
High alumina refractory compared to fireclay bricks have
less load bearing capacity.
less resistance to slag attack.
low refractoriness.
high resistance to thermal shock and creep.
✅ The correct answer is option D.
Cold crushing strength of a refractory does not depend upon its
shape
composition
firing temperature
texture
✅ The correct answer is option A.
Crushing strength of a refractory
increases with rise in service temperature.
decreases with rise in service temperature.
is unaffected with change in service temperature.
decreases with increase in porosity.
✅ The correct answer is option B.
Which is a basic refractory ?
Fireclay
Silica
Chrome magnesite
None of these
✅ The correct answer is option C.
Fireclay bricks is not used for lining the
cupola.
gas producer.
bottom of hot metal mixer.
roof of open hearth furnace.
✅ The correct answer is option C.
With increase in the alumina content, the refractoriness of high alumina refractories
increases
decreases
remains same
may increase or decrease
✅ The correct answer is option A.
Which of the following is not a neutral refractory ?
Silicon carbide
Magnesite
Chromite
Graphite
✅ The correct answer is option B.
Refractories used in/for __________ should have low thermal conductivity.
coke ovens
insulation
regenerators
muffle furnaces
✅ The correct answer is option B.
Which of the following is not a high alumina refractory material ?
Kyanite
Sillimanite
Diaspore
Periclase
✅ The correct answer is option D.