Engine exhaust systems: Recip. and Turbine

Question 1

Approximately __________ percent of the heat energy in fuel burned is lost out the exhaust system.

Answer 1

50

Question 2

Two problems caused be short exhaust stacks are
__________
__________

Answer 2

Excessive nose

Exhaust valve warpage

Question 3

The large pipe into which all exhaust gases from a radial engine flow is called a/an __________.

Answer 3

Collector ring

Question 4

The name of the exhaust system component through which exhaust gases leave the aircraft is the __________.

Answer 4

Tail pipe

Question 5

Two uses for some of the heat taken from exhaust gasses are:

Answer 5

cabin heat

carburetor heat

Question 6

Flexible ducting used for carrying the heated air from the shroud around the muffler to the carburetor heat box is __________ (red/black)

Answer 6

Red

Question 7

The stainless-steel tube through which some of the exhaust gases pass after leaving the tail pipe is called a/an __________ tube,

Answer 7

Augmenter

Question 8

Two devices used to recover some of the energy from exhaust gasses are:
__________
__________

Answer 8

Turbochargers

Power recovery turbines

Question 9

Two methods of allowing exhaust system components to move relative to each other without leaking exhaust gases are:
__________
__________

Answer 9

Slip joints

Metal bellows

Question 10

Energy extracted from exhaust gases by a power recovery turbine is coupled to the crankshaft through a ____________.

Answer 10

Fluid coupling

Question 11

An exhaust system component must be protected from marks made by galvanized metal because the __________ deposits will defuse into the metal and cause cracking

Answer 11

Zinc

Question 12

Exhaust systems must never be marked with a lead pencil because the _________ in the pencil mark will diffuse into the metal and cause cracking

Answer 12

Carbon

Question 13

The air pressure used to pressure-check an exhaust system for leaks may be produced with the use of a/an __________.

Answer 13

Vacuum cleaner

Question 14

Carbon monoxide detectors are packets of chemical crystals that change __________ in the presence of CO

Answer 14

color

Question 15

The most common type of exhaust duct for the smaller turbojet and turbofan engines is a _________ duct.

Answer 15

Convergent

Question 16

The exhaust cone is considered to be an __________ component

Answer 16

Engine

Question 17

Exhaust gasses leave the exhaust nozzle in most turbojet and low-bypass turbofan engines at the speed of __________

Answer 17

sound

Question 18

A convergent-divergent exhaust nozzle increases the thrust produced at supersonic flights by increasing the __________ of exhaust gases.

Answer 18

Velocity

Question 19

Exhaust gases enter a CD nozzle at a __________ speed

Answer 19

Subsonic

Question 20

In a CD nozzle that uses two sets of overlapping flaps to control gases as they leave an afterburner duct, the flaps are actuated hydraulicly and they are controlled by the___________.

Answer 20

Eletric Engine Control (EEC)

Question 21

A CD inlet duct and a CD exhaust nozzle serve a __________ function

Answer 21

Diferent

Question 22

Ture or False.

A noise suppressor used on a turbojet engine exhaust system decreases the total amount of sound the engine produces.

Answer 22

False

Question 23

The amount of noise a turbojet produces is related to the _________ of the exhaust gases

Answer 23

Velocity

Question 24

Low-frequency sound waves travel a __________ distance through the air than high-frequency wave

Answer 24

Greater

Question 25

Two reasons a turbofan engine produces less noise than a turbojet engine is:
__________
__________

Answer 25

The fan extracts extra energy from the exhaust gases

The exhaust gas velocities are lower

Question 26

A thrust reverser installed on a turbojet or turbofan engine produces a forward thrust that is between _________ and __________ percent of the engines rated forward thrust

Answer 26

40

50

Question 27

Two types of thrust reversers are those that use __________ doors and ___________ vaines

Answer 27

Clamshell

Cascade

Question 28

Thrust reversers are most effective on the ground when the speed is __________

Answer 28

High

Question 29

An afterburner is used on a supersonic commercial transport to decrease the time needed for the aircraft t reach its __________

Answer 29

Cruising altitude

Question 30

When the afterburner is being used, the area of the exhaust nozzle is __________

Answer 30

Increased

Question 31

The engine in a harrier jet produces a component of vertical thrust by vectoring the __________

Answer 31

Engine exhaust

Question 32

An augmented tube increases the flow of cooling through the engine cylinder fins because of low pressure caused by the high velocity___________ gases that flow through the tube

Answer 32

Exhaust