Related Questions

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
Maximum alumina content in high alumina refractory can be as high as __________ percent.
A 30
B 50
C 70
D 90
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 increase in the alumina content, the refractoriness of high alumina refractories
A Increases
B Decreases
C Remains same
D May increase or decrease
Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is
A 5CaO . 3Al2O3
B 3CaO . Al2O3
C 3CaO . SiO2
D 2CaO . SiO2
The rocks having alumina or clay as their major constituents are known as
A Siliceous rocks
B Argillaceous rocks
C Calcareous rocks
D Sedimentary rocks
Semi-silica bricks compared to silica bricks have
A Less fusion point
B Better spalling resistance
C Both A & B
D Neither A nor B
The percentage of alumina in a good brick earth lies between
A 5 to 10%
B 20 to 30%
C 50 to 60%
D 70 to 80%
A fire broke out in a garments factory. How many minutes would it take for a fire truck to got to the fire 10 miles away if it travels at a rate of 20 mph?
A 10/20
B 20/10
C 60 * (10/20)
D 60 * (20 /10)
Percentage of silica in a good brick earth lies between
A 5 to 10%
B 20 to 30%
C 50 to 60%
D 70 to 80%

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