Correct answer
D. Phenol & formaldehyde
Explanation
The correct answer is Phenol & formaldehyde.
The operating pressure drop range in a bag filter is about ________ mm water gauge?
Poly-methyl-methacrylate (PMMA) is known as________?
________ nuclear reactor does not require a heat exchanger to supply steam to power turbine?
The vacuum maintained in vacuum distillation unit for reduced crude is about ________ mm Hg?
Molecular weight of crude petroleum may be around________?
Maintenance cost of a ________ pump for a particular duty is the least?