Question 141Gas Turbine - Assistant Engineer70% to pass
The lube oil system shown in the illustration, is designed to lubricate the main bearings by what principle? Illustration GT-0023
AI Explanation
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.
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#139 What is a compressor midspan shrould? #140 What are the two common forms of axial compressor rotor blade roots? #142 As shown in the illustration, what is the purpose of pressurizing the main bearing lube oil sumps on a typical marine gas turbine? Illustration GT-0023 #143 On the gas turbine engine lube oil system shown in the illustration, air and oil are primarily separated in the air/oil separator through the use of which of the following? Illustration GT-0024 #144 On the marine gas turbine engine shown in the illustration, the 8th stage bleed air is used for which of the following? Illustration GT-0017