Question 206Motor Plants - Assistant Engineer

The correct answer is C) bypass the filter should it become clogged. A spring-loaded relief valve on a lube oil filter in a full flow system is designed to bypass the filter if it becomes excessively clogged. This prevents a sudden increase in pressure that could damage the filter casing or other components. The relief valve allows the oil to bypass the filter and continue flowing through the system, maintaining lubrication even if the filter is obstructed. The other options are incorrect because: A) the relief valve does not prevent overpressurization of the filter cartridge itself, but rather the overall system; B) the relief valve is not intended to prevent overpressurization of the filter casing, but rather to bypass a clogged filter; and D) the relief valve does not limit the lube oil outlet pressure, but rather prevents excessive pressure buildup due to a clogged filter.