Refractory Technology — Test 3

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Question 1

‘Spinel’, a refractory mineral is chemically represented as____________________?

Question 2

With increase in the density of silica refractories, its_______________?

Question 3

Mixing of ground refractory material and water is done in a ______________ mill?

Question 4

Silicon carbide refractories are used in the _____________?

Question 5

Firing temperature of magnesite bricks is about _____________ °C?

Question 6

Which of the following is not an acidic refractory?

Question 7

Grog__________________?

Question 8

Except _____________, all other refractories are bad conductors of electricity (i.e, have low electrical conductivity)?

Question 9

Refractoriness of a typical silica brick corresponds to Segar cone number, ’32’, which is equivalent to a temperature of _____________ °C?

Question 10

With increase in the alumina content in firebricks, its fusion point (refractoriness) ?