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K. induction systems
induction systems 11
| Question | Answer |
|---|---|
| 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
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