Building Construction
The disease of dry rot in timber is caused by

Alternate wet and dry conditions
Lack of ventilation
None of these
Complete submergence in water

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Building Construction
Pick up the correct statement about silt soil from the following:

The least plastic type normally consists of more or less equidimensional grains of quartz
The silt soil has particle size from 0.02 mm to 0.06 mm
All listed here
In organic fine grained silt soil possesses no plasticity

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