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Flashcards in Induction Systems Deck (28):

How does induction icing affect engine performance

Reduced power and possible erratic operation


How is induction icing categorized

Impact, fuel evaporation , and throttle ice


What causes fuel evaporation ice

A decrease in air temperature


What is the common method used to prevent induction system ice in reciprocating engine

Raise the temperature of induction air


What may be the indication of leaking intake pipes

Engine runs rough at low r.p.m


What happens if carburetor heat is applied at high engine power settings



Is carburetor throttle ice more likely to occur at a higher or lower power setting? Why?

At a lower power setting because the throttle is partly closed, offering a larger surface area for ice accumulation


What could happen if the induction system becomes obstructed

Engine may not produce it's rated power or it may not run at all. This may also mean that there is a dirty air inlet filter


What are two types of supercharged induction systems

Internally driven and externally driven


What is used to power a turbocharger

Engine exhaust gas directed onto the turbocharger turbine


What function does a turbocharger wast gate perform

Controls the amount of exhaust gas into or around the turbocharger


What could cause a turbocharged engine to surge

Wast gate or controller malfunction


Where are bellmouth inlet ducts typically found

On helicopter engines


What are the most common methods used for anti icing of turbine engine inlet ducts

Engine bleed air and electric heated elements


In a pressurized reciprocating aircraft what component in the turbocharger system is used to limit the amount of turbocharger airflow used for cabin pressurization

Sonic Venturi


What are the most common ways to control a waste gate

Mechanically with linkages to the throttle or a separate control, or by a actuator that is driven by oil pressure


What method is used to remove or prevent induction ice in a reciprocating engine

Heated air


How is some ice removed from aircraft induction systems if the carburetor heat is too low to clear the ice

Alcohol or Mersol, is sprayed into the induction system ahead of the carburetor.


What engine indication can be the result of a dirty air filter

Low power


What are two general classifications of superchargers used in reciprocating engine induction systems

internally driven or externally driven


What unit regulates the amount of exhaust gases to the turbine of a turbocharger

Waste gate


What type of power is used to control the position of the turbocharger waste gate on some engines

Oil pressure to an actuating piston


What can cause a waste gate to stick

carbon build up


What happens to the engine RPM when carburetor heat is applied

RPM drops


Why should the use of carburetor heat be limited when operating an engine with the aircraft on the ground

Air that flows into engine is not filtered air


What would be the effect on engine operation of an air leak in the intake pipe for one cylinder

Cylinder would run lean and detonation could occur


Why is it very important that the induction air filter be kept clean and replaced as often as manufacturer recommends

Clogged air filters can restrict the air entering the engine


Name three components on the induction system of a reciprocating engine

Air scoop, fuel delivery system and intake manifold