Related Questions

Maximum alumina content in high alumina refractory can be as high as __________ percent.
A 30
B 50
C 70
D 90
An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture?
A Cork
B Saw dust
C Sand
D Chemically prepared foam
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.
A 55
B 70
C 80
D 90
With increasing alumina content, the fusion point of high alumina refractories
A Increases
B Decreases
C Remains constant
D May increase or decrease ; depends on its alumina content
With increase in the alumina content, the refractoriness of high alumina refractories
A Increases
B Decreases
C Remains same
D May increase or decrease
A red house is built from red bricks . A blue house is built from blue bricks. A white house is built from white bricks. Then what is a greenhouse made from ?
A green bricks
B wood
C glass
D steel
The solid brick shown is made of small square shaped bricks of side 1. when the large brick is disassembled into its component small bricks. the total surface area of all the small bricks is how much greater than the surface area of the large brick?
A 32
B 40
C 60
D 72
Which of the following is not a high alumina refractory material?
A Kyanite
B Sillimanite
C Diaspore
D Periclase
Which is not a high alumina refractory?
A Mullite
B Corrundum
C Bauxite
D Dolomite
Maximum safe working temperature for fireclay bricks is about __________ °C.
A 1150
B 1300
C 1450
D 1550

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