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Development of swellings on the finished plastered surface is known as __________

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Development of swellings on the finished plastered surface is known as __________

(a) Dots

(b) Blistering

(c) Dubbing

(d) Grinning

I got this question in examination.

The above asked question is from Terminology Used in Plastering Work topic in portion Pointing and Plastering of Construction & Building Materials

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Correct choice is (b) Blistering

For explanation I would say: Development of swellings on the finished plastered surface is known as blistering. This is due to the presence of residual unslaked lime nodules. It is caused by the formation of bubbles under the film of paint.

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