Building Construction
The type of pointing in which upper side of mortar joints is kept about 12 mm inside the face of the masonry and bottom is kept flushed with face of wall, is

Grooved pointing
Struck pointing
Recessed pointing
Truck pointing

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Building Construction
Pick up the correct statements from the following:

Cracks appear on the plastered surface in the form of hair cracks
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
All listed here

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