Building Construction
The function of king post in a king post roof truss is

To receive the ends of principal rafter
To support the frame work of the roof
To prevent the tie beam from sagging at its centre
To prevent the walls from spreading outward

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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
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
All listed here

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