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Q: Which type of material is mainly used in making insulating tubes, switch blocks and lamps sockets?
  • A. Earthenware
  • B. Terracotta
  • C. Porcelain
  • D. Polished terra cotta
Correct Answer: Option C - Porcelain– A high grade ceramic were having white colour zero water absorption and glazed surface which can be safe or hard consists of finely dispersed clay, kaolin, quartz and felspar, backed at high temperature and covered with coloured or transparent glass.
C. Porcelain– A high grade ceramic were having white colour zero water absorption and glazed surface which can be safe or hard consists of finely dispersed clay, kaolin, quartz and felspar, backed at high temperature and covered with coloured or transparent glass.

Explanations:

Porcelain– A high grade ceramic were having white colour zero water absorption and glazed surface which can be safe or hard consists of finely dispersed clay, kaolin, quartz and felspar, backed at high temperature and covered with coloured or transparent glass.