Engine Exhaust and Reverser Systems

Question 1

What are two general types of exhaust systems in use on reciprocating aircraft engines?

Answer 1

Short stack and collector system

Question 2

What are two types of reciprocating engine exhaust systems?

Answer 2

Short stack and collector system

Question 3

What are the possible hazards of exhaust system failure?

Answer 3

Carbon monoxide poisoning or complete loss of engine power and an aircraft fire

Question 4

What type of exhaust system is generally used on low powered non supercharged engines?

Answer 4

Short stack system

Question 5

What type of exhaust system is used on turbocharged engines?

Answer 5

Collector system

Question 6

What type of exhaust system creates a high exhaust back pressure?

Answer 6

Collector system

Question 7

What is the purpose of a reciprocating engine exhaust system?

Answer 7

Remove heat and noxious gases from the engine nacelle

Question 8

What removes noxious gasses and heat?

Answer 8

A reciprocating engine exhaust system

Question 9

What are the three components of an exhaust augmenter system?

Answer 9

Bellmouth, Sleeve and Vanes

Question 10

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

Answer 10

The mark is absorbed into the metal when heated and causes a change in the molecular structure, weakening the metal

Question 11

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

Answer 11

Flat gray or sooty black carbon streaks

Question 12

How are ceramic coated exhaust stacks cleaned?

Answer 12

Degreasing method only

Question 13

What is the usual cause of muffler and heat exchanger failures?

Answer 13

Concentrated areas of thermal stress or vibration stress

Question 14

What is the most common form of damage in exhaust systems?

Answer 14

Cracks that are results of repeated expansion and contraction

Question 15

What should be the position of the waste gate when starting an engine?

Answer 15

Fully open

Question 16

Where are exhaust manifold and stack failures most likely to occur?

Answer 16

Welds, flanges, or clamped points

Question 17

What is a common cause of the waste gate unit malfunctioning in a turbocharged system?

Answer 17

Carbon buildup causing the waste gate valve to stick in the closed position

Question 18

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

Answer 18

Engine performance and exhaust gas temperature

Question 19

Why are thrust reversers not normally used during ground operations?

Answer 19

Danger of blowing foreign objects into the intake

Question 20

What are the probes in a turbine exhaust pipe used for?

Answer 20

To measure exhaust gas temperature (EGT) and pressure

Question 21

Why do you disassemble and inspect collector type exhaust?

Answer 21

Exhaust system failure can result in carbon monoxide poisoning of crew and passengers

Question 22

What is the purpose of the waste gate on a turbocharged exhaust?

Answer 22

Controls the amount of exhaust gases forced through the turbocharger turbine

Question 23

Name two types of thrust reversers.

Answer 23

Mechanical and aerodynamic blockage

Question 24

Can thrust reversers deliver 100% of engine power?

Answer 24

No

Question 25

What reference do you use when cleaning and inspecting propellers for cracks?

Answer 25

Propeller maintenance manual

Question 26

What material is used to make exhaust system muffler shrouds?

Answer 26

Stainless Steel

Question 27

What drawback in using collector type exhaust systems is more than offset when used on turbocharged engines?

Answer 27

Loss of horsepower due to exhaust system back pressure

Question 28

Why are turbocharged exhaust system leaks very damaging at high altitudes?

Answer 28

Pressure differential will cause the leak to escape with torchlike intensity

Question 29

What are the components of a typical turbine exhaust nozzle?

Answer 29

Tail cone, exhaust duct, and support struts

Question 30

What do you use to mark turbine engine blades?

Answer 30

Layout dye or chalk.

Question 31

What are two categories of thrust reversers?

Answer 31

Clam shell and cascade.