Powerplant sajo

The purpose of venturi in a carburettor is to?

• to ensure complete atomization of fuel before enter injection system

• to prevent mixture be more rich from high air velocity

• create a rise in pressure before mixture enters the induction system

• create necessary suction of fuel to flow through the main jets

Central point where fuel is distributed (injection system)?

• Manifold valve

• Fuel pump selector valve

• Discharge nozzle

• Injection valve

What is swept volume?

• Volume displaced by piston during single stroke

• Volume above the piston when at TDC

• Volume above piston when at BDC

• Volume displaced by piston during a full cycle

What's built into the exhaust system of turbofan engine to reduce velocity of exhaust gasses?

• An exhaust cone

• A divergent section

• Fins at turbines

• A convergent section

In turbine engine, the self-sustaining speed relates to minimum RPM which the engine

• will enable the generators to supply bus-bar voltage

• will continue to operate without any starter motor assistance

• operates most efficiently in cruise

• designed to idle after starting

What is FADEC?

• Full Authority Digital Engine System

• Full Digital Authority Engine Control

• Full Authority Digital Engine Control

• Full Automatic Digital Engine System

Turbofan engine with inlet air mass flow of 400 kg/s and a bypass mass flow of 320 kg/s has a bypass ratio of?

• 3

• 4

• 6

• 7