What is the purpose of the spring in a lip-type oil seal?

Correct Answer: Option B — To keep the neoprene snugly fit around the shaft

Lip-type seals utilize a garter spring to provide constant radial pressure, ensuring the flexible neoprene lip maintains a tight, leak-proof contact against the rotating shaft. This mechanical tension is vital for preventing lubricant leakage from sumps and gearboxes, maintaining the integrity of the engine's lubrication system.