Volume 3

Front 1

The purpose of the jet engine pressure ratio indicating system is to give a reference to the engines

Back 1

available thrust output

Front 2

The three benefits of the JOAP are improved safety, reduced maintenance cost, and

Back 2

increased equipment availability

Front 3

Through the use of spectrometric oil analysis, aircraft will have higher in-commission rate because there will be

Back 3

less unnecessary maintenance

Front 4

At a minimum what should you wear when taking an oil sample?

Back 4

goggles and gloves

Front 5

What indicates lubricant system contamination by dirt and sand?

Back 5

an increase in silicon

Front 6

What form must you fill out and submit to the NDI laboratory with all oil samples?

Back 6

DD Form 2026

Front 7

Jet engine tachometer gauges are calibrated in percent of

Back 7

maximum RPM

Front 8

A simple DC ignition system consists of

Back 8

vibrator, igniter plugs, and transformer

Front 9

What jet engine AC ignition system unit develops 20,000 volts delivered to the igniter plugs?

Back 9

transformer

Front 10

In a gearbox type starter system, what transmits the torque supplied by the jet fuel starter to the engine gearbox?

Back 10

power takeoff shaft

Front 11

The cartridge pneumatic starter is a gas driven turbine wheel coupled to the engine through a reduction gear system and

Back 11

an overrunning clutch

Front 12

The air turbine (impingement) starter used on jet engines

Back 12

has the advantage of less weight and fewer moving parts

Front 13

A simple DC ignition system consists of

Back 13

vibrator, igniter plugs, and transformer

Front 14

Jet engine tachometer gauges are calibrated in percent of

Back 14

maximum RPM

Front 15

What jet engine AC ignition system unit develops 20,000 volts delivered to the igniter plugs?

Back 15

transformer

Front 16

In a gearbox type starter system, what transmits the torque supplied by the jet fuel starter to the engine gearbox?

Back 16

power takeoff shaft

Front 17

The cartridge pneumatic starter is a gas driven turbine wheel coupled to the engine through a reduction gear system and

Back 17

an over running clutch

Front 18

The air turbine starter used on jet engines

Back 18

has the advantages of less weight and fewer moving parts than other starters

Front 19

What engine component must be rotated to a predetermined speed in order for a jet engine starter to be considered effective?

Back 19

compressor

Front 20

The two types of oil coolers used in jet engine oil systems are air/oil and

Back 20

fuel/oil

Front 21

A micron is a metric linear measurement equal to

Back 21

1/25,000 of an inch

Front 22

What jet engine oil pump consists of a gear and rotor within a housing?

Back 22

gerotor

Front 23

When classified according to structure, which of the following is not a type of oil pump?

Back 23

rotogear

Front 24

The purpose of a fuel/oil cooler in a fuel system is to

Back 24

heat the fuel and cool the oil

Front 25

The primary function of a hydromechanical fuel control on a jet engine is to

Back 25

meter the fuel, making certain that the jet engine gets the correct quantity for combustion at all times

Front 26

A turbo fan engine with a bypass ratio of 3:1 is classified as

Back 26

medium bypass

Front 27

Which engine type used a lot during the early years of jet engine design is the most basic turbine engine design?

Back 27

turbo jet

Front 28

What augmenter component creates local turbulence and reduces gas velocity?

Back 28

flameholder

Front 29

One common type of variable area orifice used on augmenters is the

Back 29

segmented flap

Front 30

The exhaust duct connects the turbine outlet and the

Back 30

Jet nozzle

Front 31

On some jet engines, what secures the turbine bucket in place?

Back 31

lock strips

Front 32

The three turbine designs used in jet engines are

Back 32

impulse, reaction, reaction-impulse

Front 33

Fuel that accumulates after a failed start or after engine shutdown is

Back 33

drained overboard by a drain system

Front 34

What forms the inner and outer surfaces of an annular type combustion chamber?

Back 34

interlocking stainless steel bands

Front 35

Engine design helps prevent igniter plug fouling by

Back 35

directing air around the plug electrode

Front 36

What is the purpose of a front mounted fan in an axial flow jet engine compressor?

Back 36

increase thrust and send air through the compressor core rotor

Front 37

What determines the N2 compressor rpm of a dual spool jet engine compressor?

Back 37

fuel control

Front 38

After air is drawn into the guide vanes of a centrifugal jet engine compressor, it is subjected to

Back 38

rotational and centrifugal forces

Front 39

What are the two types of jet engine compressors?

Back 39

centrifugal and axial flow

Front 40

A jet engine derives its name from the fact that

Back 40

it uses an exhaust gas driven turbine wheel to drive its compressor

Front 41

When a jet engine uses two or more turbine wheels, what is placed directly in front of each turbine wheel?

Back 41

nozzle diaphragm

Front 42

Air and gases flowing through a jet engine require

Back 42

greater velocity exiting than entering

Front 43

What effect does the divergent design of a jet engine diffuser have on pressure?

Back 43

increases pressure

Front 44

When the turbine wheel absorbs the fuel energy,

Back 44

the energy returns to the compressor

Front 45

In a jet engine, what meters the fuel for combustion?

Back 45

fuel control

Front 46

Which of Newton's Laws of Motion is the best description of why an operating jet engine produces forward thrust?

Back 46

third

Front 47

An aircraft taxiing at a constant speed is an example of

Back 47

Newton's First Law of Motion

Front 48

The ability to do work is the definition of

Back 48

energy

Front 49

The resistance of an object to change its motion is a property of matter called

Back 49

inertia