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Building Materials

Building Materials
The age of a tree can be known by examining

Cambium layer
Annular rings
Medullary rays
Heart wood

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Building Materials
Linseed oil is used in paints as

Vehicle
Drier
Thinner
Base

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Building Materials
Percentage of carbon content in mild steel is

Greater than 1.5
Between 0.25 and 0.7
Between 0.7 and 1.5
Less than 0.25

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Building Materials
If the iron ore contains clay as an impurity, the flux added during calcination, is

All listed here
Lime stone
Argillaceous iron ore
Clay

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Building Materials
Which of the following timbers is suitable for making sports goods?

Mahogany
Deodar
Sal
Mulberry

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Building Materials
The cast iron when heated to red heat with powdered red haematite in an oven for increasing its toughness, is converted to

Toughed cast iron
White cast iron
Grey cast iron
Mottled cast iron

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