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Building Materials

Building Materials
Pug mill is used for

Drying of bricks
Preparation of clay
Burning of bricks
Moulding of clay

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Building Materials
The standard size of masonry bricks, is

20 cm x 10 cm x 10 cm
21 cm x 11 cm x 11 cm
18 cm x 8 cm x 8 cm
19 cm x 9 cm x 9 cm

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Building Materials
Blister steel

All listed here
Is full of fissures and cavities
Is obtained by cementation process
Can be easily welded

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Building Materials
Which one of the following is an air binding material?

Quick lime
All of these
Gypsum
Acid-resistant cement

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Building Materials
For the manufacture of Portland cement, the proportions of raw materials used, are

Lime 63% ; silica 22% ; other ingredients 15%
Silica 40% ; lime 40% ; other ingredients 20%
Lime 22% ; silica 63% ; other ingredients 15%
Silica 70% ; lime 20% ; other ingredients 10%

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Building Materials
The rocks which are formed due to pouring of magma at the earth's surface are called

Volcanic rocks
Hypabyssal rocks
Plutonic rocks
Igneous rocks

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