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Building Materials

Building Materials
The proportions of lime and sand in the mortar normally used in brick construction are

1 : 4
1 : 2
1 : 6
1 : 8

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Building Materials
Which of the following has more fire resisting characteristics?

Marble
Lime stone
Compact sand stone
Granite

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Building Materials
Sandstone is a
(i) Sedimentary rock
(ii) Aqueous rock
(iii) Siliceous rock

Only (i)
All (i), (ii) and (iii)
Both (i) and (ii)
Both (i) and (iii)

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Building Materials
A good brick earth should contain:

About 20% to 30% of alumina
About 50% to 60% of silica
Not more than 5% of lime
All listed here

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Building Materials
Which of the following gradients exerts maximum influence on properties of steel?

iron
manganese
carbon
sulphur

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Building Materials
Compared to mild steel, cast iron has
(i) High compressive strength
(ii) High tensile strength
(iii) Low compressive strength
(iv) Low tensile strength

(i) and (iv)
(i) and (ii)
(iii) and (iv)
(ii) and (iii)

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