III.H.K9 Flashcards
- The capacitor type ignition system is used almost universally on turbine engines primarily because of its high voltage and?
High heat intensity.
- How does the ignition system of a gas turbine engine differ from that of a reciprocating engine?
A high energy spark is required for ignition.
- In a turbine engine DC capacitor discharge ignition system, where are the high voltage pulses formed?
At the triggering transformer.
- Why are turbine engine igniters less susceptible to fouling than reciprocating engine spark plugs?
The high intensity spark cleans the igniter.
- The constrained gap igniter plug used in some gas turbine engines operates at a cooler temp because?
The construction is such that the spark occurs beyond the face of the combustion chamber liner.
- Generally, when removing a turbine engine igniter plug, in order to eliminate the possibility of the technician receiving a lethal shock, the ignition switch is turned off and?
The igniter lead is disconnected from the plug and the center electrode grounded to the engine after disconnecting the transformer exciter input lead and waiting the prescribed time.
- Great caution should be exercised in handling damaged hermetically sealed turbine engine igniter transformer units because?
Some contain radioactive material.
- Igniter plugs used in turbine engines have a long service life because they?
Do not require continuous operation.
- Which statement is correct regarding the ignition system of a turbine engine?
The system is normally de-energized as soon as the engine starts.
- The type of ignition system used on most turbine aircraft engines is?
Capacitor discharge.
- Why do turbine engine ignition systems require high energy?
To ignite the fuel under conditions of high altitude and low temps.
- Which of the following are included in a typical turbine engine ignition system?
2 igniter plugs, 1 exciter unit, and 2 high tension igniter leads.
- The primary advantage of pneumatic starters over comparable electric starters for turbine engines is?
Its high power to weight ratio.
- Air turbine starters are generally designed so that reduction gear distress or damage may be detected by?
Inspection of a magnetic chip detector.
