Exhaust And Reverser Systems

Question 1

Types of exhaust stacks:

Answer 1

1) Short stack

2) Bayonet stack

Question 2

T/F

Mechanics are not allowed to weld exhaust stacks.

Answer 2

True

Question 3

Hardware springs are used for what purpose?

Answer 3

1) Absorb expansion

2) Compensate for misalignment.

Question 4

Signs of exhaust leaks:

Answer 4

1) Soot
2) Corrosion
3) Cracking

Question 5

What must be done to check exhaust for cracks?

Answer 5

Remove the shroud

Question 6

The _______ increases the cooling airflow through the engine and decreases exhaust back pressure.

Answer 6

Augmentor tube

Question 7

The augmentor tube does what?

Answer 7

Draws cooling air into the cowling and through the cylinder fins and decreases exhaust pipe pressure.

Question 8

Used to reduce exhaust noise levels on a recip engine:

Answer 8

Muffler

Question 9

The pressure in the exhaust system that opposes the flow of exhaust gases being forced out of the cylinders:

Answer 9

Exhaust back pressure

Question 10

A component that encircles a radial engine and collects exhaust gases from each cylinder:

Answer 10

Collector ring

Question 11

Flexible ducting that connects the carburetor heat muff to different components:

Answer 11

SCAT ducting

Question 12

_____% of heat energy is useful work and _____% is lost out of the exhaust.

Answer 12

31%

51%

Question 13

Systems designed to recover energy lost to the exhaust:

Answer 13

1) Power recovery turbine

2) Turbocharger

Question 14

Types of joints that allow turbocharger components to move but don’t allow leakage.

Answer 14

1) Ball joints
2) Slip joints
3) Metal bellows

Question 15

Joints mounted with spring hardware should be assembled in what orientation?

Answer 15

Spring between the nut and the joint flange.

Question 16

One type of Power Recovery Turbine:

Answer 16

Turbo-compound engine

Question 17

Two uses for heat taken from the exhaust gases:

Answer 17

1) Carb heat

2) Cabin heat

Question 18

The exhaust cone is considered a/an _______ component.

Answer 18

Engine

Question 19

Three major components of a turbine exhaust system:

Answer 19

1) Exhaust cone
2) Duct/pipe
3) Nozzle

Question 20

The purpose of the turbine exhaust system is to ________ the stream of gases.

Answer 20

Straighten and accelerate

Question 21

Types of thrust reversers:

Answer 21

1) Clamshell

2) Cascade vanes

Question 22

Airframe component that replaces the turbine engine tailpipe to reduce exhaust noise level:

Answer 22

Sound suppressor

Question 23

Sound suppressors work by _______.

Answer 23

Breaking the normal exhaust stream into a number of smaller streams.

Question 24

A cascade thrust reverser is often called a _________.

Answer 24

Aerodynamic blockage reverser.

Question 25

A clamshell reverser is often called a:

Answer 25

Mechanical blockage reverser

Question 26

The most common type of exhaust duct on a small turbojet and turbofan engine is ______

Answer 26

Convergent

Question 27

The exhaust cone does what?

Answer 27

Collects and straightens exhaust gases

Question 28

A convergent exhaust duct is considered to be ________.

Answer 28

Choked

Question 29

Uses for thrust reversers:

Answer 29

1) Reverse
2) Steep descent
3) Slow down
4) Taxiing

Question 30

Types of augmented exhaust:

Answer 30

1) Afterburner

2) Vectored exhaust