Building Construction
For providing a raft foundation, the following activities are involved1.Ramming the foundation bed2.Excavation of the soil upto required depth3.Laying the reinforcement over the foundation bed4.Curing the cement concrete placed over reinforcement5.Pouring the cement concrete over the reinforcementThe correct sequence is

2, 1, 3, 5, 4
1, 2, 3, 4, 5
5, 4, 3, 2, 1
3, 2, 5, 1, 4

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Building Construction
Rotary drilling

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

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