Before making up a flanged joint, you should __________.

Correct Answer: Option B — be certain that the flanges line up squarely

Ensuring flanges are square and properly aligned is critical to prevent mechanical stress on the piping and ensure uniform gasket compression. Misaligned flanges cause uneven bolt loading, which leads to gasket blowout or flange leakage, violating standard marine engineering practices for maintaining safe and reliable piping systems.