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Building Materials

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

Medullary rays
Cambium layer
Heart wood
Annular rings

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Building Materials
If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called

Grey or foundry pig
Bessemer pig
White or forge pig
Mottled pig

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Building Materials
Wrought iron contains carbon upto

1.0 %
1.5 %
2.0 %
0.25 %

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Building Materials
For construction of structures under water, the type of lime used, is

Pure lime
Hydraulic lime
Fat lime
Quick lime

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Building Materials
The main constituent of cement which is responsible for initial setting of cement is

dicalcium silicate
tricalcium aluminate
All of these
tricalcium silicate

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Building Materials
The constituent of cement which is responsible for all the undesirable properties of cement is

Di-calcium silicate
Tri-calcium aluminate
Tri-calcium silicate
Tetra calcium alumino ferrite

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