Refractory Technology Mcqs for Chemical

Q.  Maximum safe working temperature for fireclay bricks is about __________ °C?

a. 1150
b. 1300
c. 1450
d. 1550


ANSWER: See Answer
 
No explanation is available for this question!
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MCQs:  Dilatometer is used for the determination of ______________ of refractories?
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MCQs:  Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for _____________ bricks?
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MCQs:  The maximum linear expansion of silica bricks during firing is about ______________ percent?
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MCQs:  Hot blast main (carrying air at 1000°C) in blast furnace are lined with ______________ bricks?
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MCQs:  With decrease in porosity, the ______________ of the refractories decreases?
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MCQs:  ______________ bricks should not be used in oxidising atmosphere?
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MCQs:  Magnesite bricks have poor resistance to attack by _____________ slag?
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MCQs:  Which is not a natural insulating material ?
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MCQs:  Which of the following is not a high alumina refractory material ?
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MCQs:  ___________________ is the measure of the strength of refractory under the combined effect of temperature & load ?
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MCQs:  Which one contains minimum percentage of SiO2 ?
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MCQs:  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?
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MCQs:  Mullite is chemically represented by_________________?
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MCQs:  High alumina refractory compared to fireclay bricks have____________________?
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MCQs:  Porosity of fireclay refractories is _______________ percent?
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MCQs:  Fusion temperature of pure silica (SiO2) is _______________ °C?
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MCQs:  Bottom of basic open hearth furnace are constructed of__________________?
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MCQs:  Addition of zircon to silica refractory brick improves its_____________________?
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MCQs:  Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to__________________?
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MCQs:  Refractory bricks with lower permeability is produced by using __________________?
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