Building Construction
Rotary drilling

All listed here
Hinders the ground water observations and permeability test
Is not suitable for deposits containing very coarse gravel
Is not economical for holes of less than 10 cm

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Building Construction
Two columns 50 cm × 50 cm and 60 cm × 60 cm carry 80 tonnes and 120 tonnes of loads respectively. The centre to centre distance between columns is 5.00 metres. The permissible bearing capacity of the soil is 20 t/m2. If the footing is not to project more than 25 cm beyond the outside of the smaller column, pick up the correct design parameters of the footing from the following:

The length of the foundation slab = 7.00 m
Area of footing slab = 11.00 m2
All listed here
Distance of C.G. of the loads from the smaller column = 3.00 m

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Building Construction
Which one of the following factors is considered for the orientation of buildings?

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The direction of the prevailing winds in the area
The extent up to which the sunrays penetrate with the verandah
The exposure of the walls and roof of the buildings to the rays of sun

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