Subject O - Induction and Engine Airflow Systems Flashcards
What are the three major parts of a reciprocating engine induction system?
The air scoop, fuel delivery system, and intake manifold.
What effect does induction system icing have on engine performance?
It can cause an engine to act erratically and lose power, may possibly quit.
What method is used to prevent or remove induction system ice in a reciprocating engine?
The most common way to prevent or remove induction system ice is by the use of heated air.
How is ice cleared in some aircraft induction systems if the carburetor heat is too low to clear the ice?
A fluid such as alcohol, anilol, or mersol is sprayed in the induction system ahead of the carburetor. The fluid will dislodge the ice which is ingested by the engine.
What engine indication can be the result of a dirty air filer?
Low power
What is the danger of using carburetor heat when operating at high power settings?
The higher air temperatures could cause detonation and possible engine failure.
Carburetor throttle ice is most likely to form when the throttle is in which position?
When the throttle butterfly is in the partially closed position.
What are two general classifications of superchargers used in reciprocating engine induction systems?
They are classified as either internally driven or externally driven supercharger systems.
What is the purpose of a distribution impeller in a radial engine?
It is designed to break up the fuel globules into finer particles for better distribution to the cylinders.
How does an internally driven supercharger get its power?
Internally driven superchargers are mechanically engine driven. A high speed impeller is driven through a gear train from the crankshaft. The use of gear ratios can be single stage or two speed.
Where does an externally driven supercharger get its power?
By the exhaust gases that are directed against a turbine.
What unit regulates the amount of exhaust gases to the the turbine of a turbocharger?
the 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 the waste gate to stick?
A buildup of carbon can cause the waste gate to stick.
