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Building Materials

Building Materials
Glazing is used to make earthenware

porous
impervious
soft
hard

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Building Materials
Good quality stones must

Resist action of acids
Be durable
Be free from clay
All of these

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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

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

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Building Materials
The minimum compressive strength of 1st class bricks should be

120 kg/cm²
75 kg/cm²
100 kg/cm²
75 kg/cm²

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Building Materials
Plywood is made by bonding together thin layers of wood in such a way that the angle between grains of any layer to grains of adjacent layers is

0°
45°
30°
90°

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Building Materials
Formula for quick lime, is

None to these
CaCO₃
Ca(OH)₂
CO₃CO₂

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