Question 101Gas Turbine - 1st Asst/Chief
70% to passIn the marine gas turbine engine shown in the illustration, the HP turbine 1st stage nozzle vanes are cooled by which of the following? Illustration GT-0020
A8th stage compressor air.
B9th stage compressor air.
C13th stage compressor air.
D16th stage compressor air.
AI Explanation
The correct answer is D) 16th stage compressor air. In a marine gas turbine engine, the high-pressure (HP) turbine 1st stage nozzle vanes are typically cooled by the 16th stage compressor air. This air is extracted at a higher pressure and temperature, which is ideal for cooling the critical nozzle vanes that experience the highest temperatures in the turbine section. The other options, A, B, and C, would not provide sufficient cooling capacity for the HP turbine 1st stage nozzle vanes, as the compressor air from lower stages would not be at a high enough pressure and temperature to effectively cool these components.
Related Questions
Q68:A reddish-colored oxide usually forms on which of the following metals? Q70:Active corrosion on copper alloys is indicated by which of the following? Q4:In the operation of a marine propulsion gas turbine, kinetic and thermal energy ... Q54:What action should you take if full power vibration limits are exceeded on a gas... Q45:During an operation of a main propulsion gas turbine, the engine shuts down. Whi...
Ready to test your knowledge?
Take a Gas Turbine - 1st Asst/Chief Practice ExamOfficial Resources