Question 141Gas Turbine - Assistant Engineer

The correct answer is A) Spray lubrication with dry sumps. The lube oil system shown in the illustration GT-0023 is designed to lubricate the main bearings using the principle of spray lubrication. In this system, the oil is pumped from a dry sump (not a submerged oil bath) and sprayed onto the main bearings, providing a continuous supply of lubrication. This method is commonly used in marine diesel engines to ensure effective lubrication while minimizing the amount of oil required. The other options are incorrect because B) a totally submerged oil bath is not the principle used in this system, C) splash lubrication relies on the motion of the crankshaft to distribute the oil, and D) a self-contained partial oil bath is a different lubrication system that is not depicted in the illustration.