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Popping is the formation of a _________ hole in the plastered surface.

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Popping is the formation of a _________ hole in the plastered surface.

(a) Circular

(b) Conical

(c) Cylindrical

(d) Rectangular

I had been asked this question in an interview for internship.

I'd like to ask this question from Terminology Used in Plastering Work in portion Pointing and Plastering of Construction & Building Materials

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Correct option is (b) Conical

The best I can explain: Popping is the formation of a conical hole in the plastered surface. It is due to the presence of some particles which on setting result in expansion.

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