Question 371General Subjects - Assistant Engineer

You are correct, the answer is A) Scoring may result. The reason is that using metallic or semi-metallic packing hooks or pullers on bronze or brass shafts, rods, plungers, or sleeves can cause scoring or galling of the softer bronze or brass surface. This is because the harder metallic tool can dig into and scratch the softer metal, damaging the surface. This scoring can lead to leaks and other operational issues. The other answer choices are incorrect because they do not directly address the reason for avoiding metallic tools on bronze or brass components. Valve seat damage, heat transfer restrictions, and bonnet corrosion are not the primary concerns in this scenario.