HomeEngineeringTLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm. 5871. TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.By Admin / September 7, 2025 5 100 1000 2000 ✅ The correct answer is option A.
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