1) In the H.E.I.U. the discharge resistors Report

allows the capacitors to discharge when the unit is switched off

allows sufficient voltage to be stored to provide relight facilities up to 55,000 ft

protects the unit from excessive voltages

2) In the H.E.I.U. the choke Report

prolongs the life of the plug

protects the unit from excessive high voltages.

prolongs the discharge

3) In an electrical starting system, the slow start resistor is short circuited by the Report

time switch

centrifugal Switch

overspeed switch

4) The advantage of an air starter system is Report

it provides a more rapid start

it is light, simple and economical

there is no risk of engine fire during starting

5) An advantage of a gas turbine starter is Report

it provide high power for low weight

it uses a low volatile fuel

it does not require external connections

6) If the engine fails to light-up, the starter cycle is canceled by Report

a centrifugal switch

a low pressure relay

a time switch

7) For starting the engine, the H.P cock should be initially Report

open

closed

in a position which depends on the fuel system.

8) On light up, the gas temperature will Report

rise slowly

rise rapidly, then fall as RPM increases to idle

rise rapidly

9) Self sustaining RPM means that Report

The engine can accelerate to full power in under 5 seconds

There is sufficient power for ground maneuvering

The engine will run independently of external help

10) A 'hot start' with excessive temperatures may be caused by Report

wrong grade of fuel

throttle partly open

high electrical power supply

11) A dry motoring cycle would be required to Report

check engine run down time

check the operation of the igniters

clear the engine after a wet start

12) What type of turbine blade is most commonly used in air starter motors? Report

Impulse

Reaction

Impulse-reaction

13) Ignitor plugs are cleaned by Report

compressed air and brushing lightly with soft brush

light sand blasting

steel wool

14) An H.E.I.U works by Report

ac busbar

a contact breaker

a discharging capacitor

15) When is ignition used? Report

For relight and start up

For continuous relight

At high altitudes

16) An ignitor plug for a large gas turbine takes the form of a Report

'glow' plug

sparking plug

surface discharge plug

17) The spark in the High Energy igniter is supplied by Report

a capacitor

the AC busbar

a contact circuit breaker

18) Self sustaining speed is Report

V1 speed

the RPM at which the engine continues without external assistance

take off velocity

19) During normal running conditions Report

combustion is intermittently supported by ignition

combustion is self supporting

combustion is continuously supported by ignition

20) High energy ignition is required because of the Report

high flash point of the fuel

absorbed moisture content

low flash point of the fuel

EASA Questions Mod 15: Gas Turbine Engine Set 13: Ignition Systems

Set 1: Fundamentals

Set 2: Engine Performance

Set 3: Engine Inlet

Set 4: Eng. compressors

Set 5: Combustion Section

Set 6: Turbine Section

Set 7: Engine Exhaust

Set 8: Bearing and Seals

Set 9: Lubricants and Fuel

Set 10: Lubrication system

Set 11: Fuel Systems

Set 12: Air Systems

Set 13: Ignition Systems

Set 14: Engine Indication

Set 15: Power Augmentation

Set 16:Turboprop engines

Set 17: Turboshaft

Set 18: APU

Set 19:Powerplant Installation

Set 20: Fire Protection

Set 21:Engine Monitoring

Set 22: Engine Storage