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K. induction systems

induction systems 11

QuestionAnswer
name the three components on the induction system of a reciprocating engine. the air scoop, carburetor or fuel control, and the intake manifold.
what could happen if the induction system becomes obstructed? the engine may not be able to produce its rated power or it may not run at all. this may also be an indication of a dirty air inlet filter.
how does induction icing affect engine performance? it causes a reduction in power and possible erratic operation.
how is induction icing categorized?(3) as impact ice, fuel evaporation ice, and throttle ice.
what is the common method used to prevent induction system ice in a reciprocating engine? raise the temperature of induction air with a preheater.
what causes fuel evaporation ice? fuel evaporation ice is formed because of the decrease in air temperature resulting from evaporation of the fuel after it is introduced into the air stream.
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 may be the indication of leaking intake pipes? the engine runs rough at low rpm.
what happens to engine power when the carburetor heat is applied? there is a noticeable drop in power.
what could happen if carburetor heat is applied at high engine power setting? detonation.
what are two types of supercharged induction systems? internally driven and externally driven.
how and what point does an internally driven supercharger boost air pressure? an (engine-driven) impeller compresses the fuel/air mixture after it leaves the carburetor.
what is used to power a turbocharger? engine exhaust gas directed into the turbocharger turbine.
what could result if the waste gate on a turbocharger system does not close fully? the engine may not be able to produce its rated power at certain altitudes, and the aircraft may not be capable of reaching critical altitude.
what function does a turbocharger waste gate perform? it controls the amount of exhaust gas either into or around the turbocharger , thus controlling the boot pressure of the turbocharger.
what could cause a turbocharged engine to surge?(2) there could be a waste gate or controller malfunction.
what are the most common ways to control a waste gate?(2) either mechanically with linkages to the throttle or a separate control, or by an actuator that is driven by oil pressure.
in a pressurized reciprocating aircraft, what component in the turbocharger system is used to limit the amount of turbocharger airflow used for cabin pressurization? the sonic venture.
what is the function of a divergent-shaped jet engine inlet during subsonic flight? it causes the air velocity to decrease with a subsequent increase in air pressure.
where are bellmouth inlet ducts typically found? on helicopter engine.
how do venture-type particle separators, found on many turbine powered helicopters, function? a venture is used to accelerate the flow of incoming air and debris through a curved intake. the debris gains too much inertia to allow it to follow the curved intake towards the engine, and is channeled away from the compressor.
what are the most common methods used for anti-icing of turbine engine inlet ducts?(2) engine bleed air and electric heating elements.
Created by: Justin84