Question 79Gas Turbine - 1st Asst/Chief
70% to passA fuel analysis report for a gas turbine propelled vessel indicates a calcium level in excess of 0.5 ppm. High calcium levels in distillate fuels for gas turbines can cause which of the following?
AAbrasive wear in the compressor section of the turbine.
BClogged fuel filters in the fuel service system.
CCalcium deposits which can clog cooling holes in the turbine section.
DCorrosion in the combustor section of the turbine.
AI Explanation
The correct answer is C) Calcium deposits which can clog cooling holes in the turbine section. High calcium levels in distillate fuels for gas turbines can lead to the formation of calcium deposits that can clog the critical cooling holes in the turbine section of the engine. This can disrupt the cooling of the turbine blades, leading to potential damage or failure of the turbine. The other options are incorrect because abrasive wear in the compressor (A) is not a typical issue with high calcium levels, clogged fuel filters (B) are more associated with particulate matter, and corrosion in the combustor (D) is not the primary concern with elevated calcium content in the fuel.
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