Question 25Gas Turbine - Assistant Engineer
70% to passWhich of the following statements is true concerning the fuel oil ignition system of the gas turbine engine shown in the illustration? Illustration GT-0017
AThe igniters will only energize if the exhaust gas temperature falls below a preset value.
BThe igniters will de-energize when the power turbine exceeds a preset RPM.
CThe igniters will de-energize when the gas generator exceeds a preset RPM.
DThe igniters remain energized throughout the normal operation of the engine.
AI Explanation
The correct answer is C) The igniters will de-energize when the gas generator exceeds a preset RPM. This is correct because in a gas turbine engine, the igniters are used to initiate combustion during engine start-up. Once the gas generator reaches a preset RPM, the igniters are automatically de-energized as the engine is able to sustain combustion without them. The other options are incorrect because A) the igniters are not controlled by exhaust gas temperature, B) the igniters are not controlled by the power turbine RPM, and D) the igniters do not remain energized throughout normal engine operation.
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