GTS Mod 6 Difficult

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What is the purpose of the High Energy Ignition Unit (HEIU) in a gas turbine engine system?

To regulate power from the battery bus

To dissipate energy as high-voltage, high-amperage discharge across the igniter plug (correct)

To control the voltage supply from the engine starting system

To store electrical energy until a predetermined value is reached

Which type of ignition system receives power from the aircraft AC bus?

High tension current system (correct)

Intermittent duty cycle system

Continuous duty cycle system

Low tension current system

What does the term 'duty cycle' refer to in the context of ignition systems?

The type of voltage supply controlled by the engine starting system

The time limit placed on the operation of the ignition system (correct)

The dissipation of electrical energy in the HEIU

The position of igniter plugs within a combustion chamber

Where does a low tension current system receive its power from in a gas turbine engine?

Battery bus Signup and view all the answers

What are the two common types of gas turbine ignition systems mentioned in the text?

Low tension (DC voltage) and high tension (AC voltage) Signup and view all the answers

How do igniter plug types vary between engine designs?

Based on their position within a combustion chamber Signup and view all the answers

What is the purpose of a continuous duty cycle ignition system in an aircraft?

To provide continuous engine relight capability during critical flight manoeuvres Signup and view all the answers

In what situations would aircrew typically select just one igniter plug?

During cruise flight when delayed engine relight is not critical Signup and view all the answers

What is a common feature of both AC and DC igniter systems?

They contain similar components Signup and view all the answers

Why are gas turbine engines typically equipped with a dual high energy ignition system?

To provide redundancy in case one system fails Signup and view all the answers

Which component of an ignition system is responsible for controlling the flow of high energy current to the igniter plugs?

Ignition relay Signup and view all the answers

What is the main difference between a DC bus and an AC bus ignition circuit breaker?

Operating voltage Signup and view all the answers

What is the duty cycle of the ignition system based on the information provided?

2 minutes on, 3 minutes off Signup and view all the answers

At what RPM range does the ignition system operate continuously according to the text?

16% to 65% Signup and view all the answers

What happens when the engine speed goes above 65% based on the information provided?

The ignition system is de-energized Signup and view all the answers

What component connects the HEIUs to the igniter plugs according to the passage?

High tension ignition leads Signup and view all the answers

Which type of current is used to supply ignition voltage through the high tension ignition harness?

High tension current Signup and view all the answers

What does the diode in this figure represent in the context of the ignition system operation above 65% RPM?

One-way valve Signup and view all the answers

GTS Mod 6 Difficult

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