Question 88Gas Turbine - 1st Asst/Chief
70% to passThe secondary passages on the gas turbine engine fuel nozzles shown in the illustration are designed to open at approximately what pressure? Illustration GT-0005
A30 PSIG
B130 PSIG
C230 PSIG
D330 PSIG
AI Explanation
The correct answer is D) 330 PSIG. The secondary passages on the gas turbine engine fuel nozzles shown in illustration GT-0005 are designed to open at approximately 330 PSIG. This is the typical opening pressure for the secondary fuel passages, which serve as a backup fuel delivery system in case the primary passages become blocked or obstructed. The other answer choices are incorrect because 30 PSIG is too low, 130 PSIG is too low, and 230 PSIG is also too low for the secondary fuel passage opening pressure of a gas turbine engine fuel nozzle system.
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