14.3 exercises

What are the two systems required for a gas-turbine engine to start satisfactorily?

• Fuel system and lubrication system

• Electrical system and hydraulic system

• Cooling system and exhaust system

• Starting system and ignition system

What is the primary function of the starting system in a gas-turbine engine?

• To rotate the compressor and turbine

• To monitor engine temperature

• To cool the engine during operation

• To ignite the fuel-air mixture

What can occur if the engine does not reach the correct speed during startup?

• A successful start

• A cold start

• A false (hung) start

What type of starters are commonly used for gas-turbine engines?

• Diesel starters and gas starters

• Manual starters and solar starters

• Air-turbine starters and electric starters

• Hydraulic starters and pneumatic starters

What is a characteristic of electric starters for smaller gas-turbine engines?

• They require no external power source

• They are coupled through a reduction gear and ratchet mechanism

• They produce low starting torque

• They operate without a cooling period

What is the purpose of the cooling period for the starter motor?

• To maintain fuel pressure

• To recharge the battery

• To prevent overheating due to large current draw

• To allow the engine to cool down

What is the role of the ignition system in the starting process?

• To monitor engine performance

• To mix fuel with air

• To ignite the fuel-air mixture in the combustion section

• To provide cooling to the engine

In the H.E.I.U, the choke prolongs

• the life of the plug.

• the unit from excessive high voltages.

• the discharge.

An advantage of a gas turbine stater is

• It provide high power for low weight.

• It provides low power for high weight.

• It uses a low volatile fuel.

If an engine fails to light-up, the starter cycle is canceled by

• a centrifugal switch

• a low pressure relay

• a time switch