Building Construction
An arch may fail due to

Crushing of the material
All listed here
Sliding of voussoirs
Uneven settlement of abutments

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Building Construction
Pick up the correct statements from the following:

Excessive thermal variations in the backing or plaster causes the plaster to fall
All listed here
Cracks appear on the plastered surface in the form of hair cracks
In brick work, the efflorescence is removed by applying a solution of zinc sulphate and water

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