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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Building Construction
Gravels

Never swell when they come into contact with water
Are cohesionless aggregates
Vary in size between 2 to 20 mm
All listed here

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