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Refractory Technology — Test 4

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Question 1
Quartz is___________________?
Question 2
Water content in ground refractory material to be shaped into bricks by hand moulding is about ______________ percent?
Question 3
Maximum alumina content in high alumina refractory can be as high as _____________ percent?
Question 4
Panel test determines the _____________ of refractories?
Question 5
Chemically, mullite refractories is____________________?
Question 6
Presence of MgO in alumino-silicate refractories _______________ its refractoriness?
Question 7
Fireclay bricks are not used in the _________________?
Question 8
High porosity refractory bricks have _______________?
Question 9
Magnesite refractories are generally not used in the___________________?
Question 10
Thermal diffusivity of a refractory brick is high, when its ____________ is high?