Engine exhaust and reverser Systems

Question 1

What are the two types of reciprocating engine exhaust systems

Answer 1

The short stack system and collector system

Question 2

What are the possible hazards of exhaust system failure

Answer 2

Can result in carbon monoxide poisoning of the crew and passengers or partial or complete loss of engine power and aircraft fire

Question 3

What type of exhaust system is generally used on low powered non-supercharged engine’s

Answer 3

Short stack systems

Question 4

What type of exhaust system is used on turbo charged engine’s

Answer 4

Exhaust collector system

Question 5

What is the purpose of reciprocating engine exhaust system

Answer 5

Used to remove he and noxious Gases from the engine nacelle

Question 6

What happens when lead, zinc, or galvanized marks are made on an exhaust system

Answer 6

The mark is absorbed by the metal when heated and causes a change in the molecular structure that weakens the metal

Question 7

What type of visual indication can usually be seen in an area of an exhaust leak

Answer 7

Exhaust leaks usually leave flat gray or sooty black Carbon streaks on the pipes in the area of leaks

Question 8

How are ceramic coated exhaust stacks cleaned

Answer 8

By degreasing method only

Question 9

What is usual cause of muffler and heat exchanger failures

Answer 9

Usually caused by concentrated areas of thermal stress, or vibration stress

Question 10

What is the most common form of damage and exhaust systems

Answer 10

Cracks that are the result of repeated expansion and contraction

Question 11

What should be the position of the wastegate when starting an engine

Answer 11

Fully open

Question 12

Where are exhaust manifold and stack failures most likely to occur

Answer 12

Welds, flanges, or clamped points in the system

Question 13

What is a common cause of the wastegate unit malfunctioning in a turbo charger system

Answer 13

Carbon buildup, coke build up causing the Waze gate valve to stick in the closed position

Question 14

What factors are affected if the area of the exhaust nozzle of a turbine engine is changed

Answer 14

The size of the exhaust nozzle affects both the engine performance and the exhaust gas temperatures

Question 15

Why are thrust reverser’s not normally used during ground operation

Answer 15

The danger of blowing foreign objects up into the intake stream is too great

Question 16

What are the pros in a turban exhaust pipe used for

Answer 16

Measure exhaust gas temperature and pressure

Question 17

Why do you disassemble and inspect the collector type exhaust

Answer 17

Failure can result in carbon monoxide poisoning of the crew and passengers

Question 18

What is the purpose of wastegate on a turbo charged exhaust

Answer 18

The valve controls the amount of exhaust gases forced through the turbo charger turbine. When the gate is fully closed all gases must pass through the turbine