Subject Q - Engine Exhaust and Reverser Systems Flashcards
what are two types of reciprocating engine exhaust systems?
The short stack system and collector system.
What are the possible hazards of exhaust system failure?
it can cause carbon monoxide poisoning of the crew and passengers, or partial or complete loss of engine power and aircraft fire.
What type of exhaust system is generally used on low powered non-supercharged engines?
The short stack system
What type of exhaust system is used on turbo charged engines?
The exhaust collector system.
What type of exhaust system creates a higher exhaust back pressure?
the collector system.
What is the purpose of a reciprocating engine exhaust system?
It is used to remove heat and noxious gases from the engine nacelle.
What happens when lead zinc or galvanized marks are made on an exhaust system?
The mark is absorbed by the metal when heated and can cause a change in the molecular structure that weakens the metal.
What Type of visual indication can usually be seen in the area of an exhaust leak?
Exhaust leaks usually leave flat grey or sooty black carbon streaks on the pipes in the area of the leak.
How are ceramic coated exhaust stacks cleaned?
by the degreasing method only.
What Is the usual cause of muffler and heat exchanger failures?
They are usually caused by concentrated areas of thermal stress, or vibration stress
What is the common form of damage in exhaust systems?
Cracks that are the result of repeated expansion and contraction
What should be the position of the Waste gate when starting an engine?
Fully open
Where are exhaust manifold and stack failures most likely to occur?
They usually occur at welds, flanges, or clamped points in the system.
What is a common cause of the wastegate unit malfunctioning in a turbocharger system?
The most common cause of the wastegate unit malfunctioning is carbon buildup, “coke buildup” causing the waste gate valve to stick in the closed position
What factors are affected if the area of the exhaust nozzle of a turbine engine is changed?
The size of the exhaust nozzle affects both the engine performance and the exhaust gas temperature.
