HomeEngineeringA safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of______________? 526. A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of______________?By Admin / September 7, 2025 A. Carbondioxide gas B. Hydrogen sulphide gas C. Methane gas D. Petrol vapours ✅ The correct answer is option C.
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