Question 187General Subjects - 1st Asst/Chief

The correct answer is A) Misaligned/stressed piping connections, deteriorated foundation, 'Loose Foot'. Pump casing distortion can be caused by misalignment or stress in the piping connections, a deteriorated foundation, or a 'loose foot' where the pump is mounted. These factors can put undue strain on the pump casing, leading to cracking, leaks, and eventual mechanical problems with the pump. The other options are incorrect because excessive vibrations (B) or loose foundation bolts (C) can contribute to pump casing issues, but they are not the primary cause of the distortion that leads to cracking and leaks. Misalignment between the prime mover and pump (D) is also a potential issue, but it is not the direct cause of the casing distortion described in the question.