HomeEngineeringTrepanning is an operation of 12433. Trepanning is an operation ofBy Admin / September 13, 2025 making a cone-shaped enlargement of the end of a hole smoothing and squaring the surface around a hole sizing and finishing a small diameter hole producing a hole by re ✅ The correct answer is option D.
1. A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm². Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin
2. Transformer cores are normally made from Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin