Reciprocating Engine Exhaust

Question 1

The 2 types of exhaust systems used on piston engine aricraft

Answer 1

1. Short stack 2. Collector system

Question 2

The main disadvantage of a collector system-type exhaust on a piston aircraft, that turbocharging solves

Answer 2

Increased Exhaust back pressure

Question 3

What does an increase in exhaust system back pressure do to horsepower?

Answer 3

decreases it

Question 4

Exhaust collectors on piston engines are attached to each cylinder with brass____ or heat-resistant______

Answer 4

lock-nuts

Question 5

The hardware that sections of the exhaust system are typically joined together with

Answer 5

Spring-loaded ball joints

Question 6

What the spring-loaded ball joints found on the exhaust collector systems allow for

Answer 6

Thermal expansion

Question 7

The exhaust collector on a radial type piston engine is called

Answer 7

Collector ring

Question 8

The term for the piece of metal that surrounds the muffler

Answer 8

Shroud

Question 9

The metal that typical exhaust systems are made of

Answer 9

CRES

Question 10

Durring maintence and inspection of exhaust system, NEVER use these types of tools! (3)

Answer 10

1. Galvanized tools 2. Zinc tools 3. Lead pencil

Question 11

Answer 11

Bayonet

Question 12

Answer 12

Shroud

Question 13

Answer 13

Studs (knobs)

Question 14

Some exhuast systems on piston aircraft use a coat of______

Answer 14

ceramic coating

Question 15

Never use______ cleaners to clean ceramic coated exhuast

Answer 15

alkaline cleaners (ajax)

Question 16

Escaping gas through a crack on an exhasut system of a piston engine will be evindenced by

Answer 16

gray streak on the outside of a muffler

Question 17

Desribe the method of checking for leaks on an exhuast system via compressed air

Answer 17

1. Seal up all compartments and pressurive with 2psi
2. Spray soap-water solution

Question 18

The system on a piston engine that serves the purpose of cooling but also exhuast

Answer 18

Augmentor tubes

Question 19

The most likely area to find cracks on the muffler system

Answer 19

welds

Question 20

Coke/ carbon buildup in an exhuast gas system can be an indication of ____ ______ malfunction

Answer 20

waste gate

Question 21

What does the FAA say about repairing exhuast systems such as welded repairs out in the field

Answer 21

Advised to replace rather repair

Question 22

galvonizing does what to a iron or steel

Answer 22

coats it with zinc

Question 23

The type of connecting joint found on Collector ring tubes of radial engines

Answer 23

Slip joints

Question 24

What can cause the waste gate to stick open or closed and cause an over-boost condition?

Answer 24

Exhuast deposit build-up

Question 25

Identify the type of joint

Answer 25

Slip-joint