Question 95Gas Turbine - 1st Asst/Chief70% to pass
Which of the following is the most probable cause if, while underway, the main propulsion gas turbine air intake blow-in doors open?
AI Explanation
The correct answer is D) Ice has formed on the air intakes.
The blow-in doors on the main propulsion gas turbine air intake are designed to open if ice forms on the air intakes. This prevents the ice buildup from restricting airflow and causing damage to the engine. Options A, B, and C are incorrect because they do not directly cause the blow-in doors to open - high exhaust pressures, high air inlet pressures, or high air inlet temperatures would not necessarily trigger the blow-in door mechanism. Ice formation on the air intakes is the most probable cause for the blow-in doors to open while the vessel is underway.
Related Questions
#93 The six borescope ports located in the compressor rear frame casing of the marine propulsion gas turbine shown, can be used to inspect all EXCEPT which of the following components? Illustration GT-0006 #94 While underway on a ship with gas turbine engines, the most likely indication of an engine stall is which of the following? #96 In which of the following ways can compressor surge cause excessive temperatures in the turbine section? #97 To prevent overheating of the illustrated turbine blade, which of the following fluids is circulated through it via the shaped internal passages? Illustration GT-0029 #98 As shown in the illustration, the HP turbine 2nd stage blades are cooled by convection, with the cooling air being discharged at which of the following? Illustration GT-0011