A) A continuous spark ignition is required during run time
B) The high-energy ignition source is obtained by discharging a booster coil into the storage capacitors C) The high voltage required to fire the ignition plug is obtained by discharging the capacitors through a step-down transformer D) Ignition is required only during starts and automatically cuts out at 95% engine rpm E) When the turbine is operating it is checked automatically 52. The three centrifugal speed sequence switches in the APU are adjusted to actuate at what percentage of turbine speed? A) 30, 60, and 90 B) 35, 95, and 106 C) 35, 95, and 110 D) 50, 75, and 100 E) 40,80 and 120 53. What causes the overspeed switch to be checked? A) When the turbine is operating it is checked automatically B) When turbine speed reaches 106% it activates and cuts off fuel to the engine C) It must be checked with the turbine operating D) The lever cannot be manually actuated E) To provide interior lighting for night maintenance actions 54. Which of the following is the function of the starter clutch assembly? A) To prevent excessive torque between the starter and accessory drive gears only B) To automatically engage and disengage the starter with the gear train only C) To automatically engage the engine compressor and turbine sections only D) It must be checked with the turbine operating E) The current in the shunt winding 55. Why are naval aircraft designed to accept external power? A) To start aircraft engines so maintenance can be performed in the hangar B) To provide maintenance personnel with ground power without starting engines C) To provide interior lighting for night maintenance actions
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