Final answer:
When installing a gasket, hand-tightening all fasteners before using a wrench is important to ensure proper alignment and compression.
Step-by-step explanation:
When installing a gasket, it is important to hand-tighten all fasteners before applying a wrench. This is because hand-tightening helps ensure that the gasket is properly aligned and evenly compressed, reducing the risk of leaks or damage. Using a wrench immediately without hand-tightening may result in an uneven distribution of pressure and potentially lead to improper sealing or damage to the gasket.