Building Construction
Rotary drilling

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

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Building Construction
Which one of the following activities is not correct as applicable to brick corbels

Stretcher bond is generally used for the construction of brick corbel
The maximum projection of the corbel should not be more than the thickness of the wall
The discontinuous corbels are used to carry heavy concentrated loads
The maximum projection of each corbel course should be limited to a quarter brick at a time

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