Building Construction
An arch may fail due to

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

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Building Construction
Mansard roof is a roof which slopes in

Four directions without break in the slope on each side
Two directions with break in the slope on each side
Four directions with break in the slope on each side
Two directions without break in the slope on each side

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Building Construction
Pick up the correct statements from the following:

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

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