ENGINE EXHAUST SYSTEMS Flashcards
What are two types of reciprocating engine exhaust systems?
The short stack system and the collector system
What are the possible hazards of exhaust system failure?
Depending on the location and type of exhaust system failure, it can result in carbon monoxide
poisoning of the crew and passengers, partial or complete loss of engine power, and an aircraft
fire.
What type exhaust system is generally used on low powered non-supercharged engines?
The short (open) stack system.
What type of exhaust system is used on turbocharged 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?
To dispose of high temperature, noxious gases that are discharged by the engine
What happens when lead, zinc, or galvanized marks are made on an exhaust system?
The mark is absorbed by the metal when it is heated and causes a change in the molecular
structure of the metal.
What type of visual indication can usually be seen in the area of an exhaust leak?
Exhaust leaks usually leave flat gray or sooty black streaks on the pipes in the area of the leak
How are ceramic-coated exhaust stacks cleaned?
By degreasing only
What is the usual cause of muffler and heat exchanger failures?
They are usually caused by thermal and vibration cracking or ruptures in areas of stress
concentration
Where are exhaust manifold and stack failures most likely to occur?
These failures usually occur at welded or clamped points in the system.
What is a common cause of the waste gate unit malfunctioning in a turbocharger system?
The most common cause of waste gate malfunctioning is carbon 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.
What are the probes in a turbine exhaust tailpipe used for?
They are used to measure exhaust gas temperature (EGT).
Why do you disassemble and inspect the collector type?
Exhaust system failure can result in carbon monoxide poisoning of crew and passengers
