Turbine Engine Construction And Hot Section

Front 1

What four factors are the most important to consider when using an alloy for the turbine section

Back 1

Thermal shock resistance, High creep strength, low coefficient of expansion, corrosion resistance

Front 2

What is the function of the nozzle diaphragm in the hot section of a turbine engine

Back 2

Directs the flow of gases on to the turbine at the most effective angle

Front 3

Stress ruptures in turbine blades are caused by what

Back 3

High temperatures

Front 4

What turbine will design features will reduce vibration in lesson exhaust gas bypassing the turbine blade

Back 4

Shrouded tip blades

Front 5

What are the two parts of a combustion section

Back 5

Outer case, inner liner

Front 6

Straw coloration on the turbine blades indicates what

Back 6

Leaded gasoline has been used as a fuel

Front 7

Aside from expanding the mass, what are the other two purposes of the combustion section

Back 7

Confine the combustion process, allow largest in gas volume to occur

Front 8

What are the three types of combustion Chambers used by turbine engines

Back 8

Can, annular, can annular

Front 9

What is pumped or piped back to the turbine nozzle to help keep them cooler

Back 9

Bleed air

Front 10

What are the two types of turbine Wheels used in a gas turbine engine

Back 10

Radial inflow, axial flow

Front 11

Turbine blades that have been removed need a temporary identification written on them what up pencil suffice what about wax or grease pencil

Back 11

None of those can be used

Front 12

Turbine blades have been removed from the turbine wheel for detail inspection when reinstalling them, where must you installed the blades

Back 12

Where they were previously installed

Front 13

Which type of combustor will require technicians to split the engine to remove it

Back 13

Annular

Front 14

What is the purpose of the turbine section in a gas turbine engine

Back 14

Drive the compressor and accessories

Front 15

What thermodynamic cycle does the combustion section of a turbine engine

Back 15

Brayton cycle

Front 16

What function do the holes, slots, and louvers on a combustor perform

Back 16

To Route the primary and secondary air

Front 17

What are the three types of axial turbine blades

Back 17

Impulse, reaction, impulse reaction

Front 18

Turbulent inlet conditions could cause the two types of turbine malfunction

Back 18

Compressor stall, surge

Front 19

If Engineers needed to extract more energy from the exhaust gases than a single turbine will could observe, what would be the solution to extract more energy

Back 19

Add more turbine Wheels

Front 20

If you can type combustor system, how will all of the cans that do not have a igniters light off

Back 20

Method is provided to allowed to igniters to light off all of the cans

Front 21

What type of combustor design is the outer case and inner liner remove together as one unit

Back 21

Can type

Front 22

What is the purpose of active clearance control

Back 22

Controlling turbine case expansion

Front 23

What component does the low pressure turbine drive

Back 23

Low-pressure compressor, N1

Front 24

What is the blade attachment method used by turbine blades to keep them attached to the turbine wheel

Back 24

Fir tree method

Front 25

What is the most critical variable for turbine engine operation? What component location is this variable the highest

Back 25

Turbine inlet temperature (TIT)

In the combustion chamber

Front 26

What two things will prevent the turbine case from Contracting around the turbine wheel blade assembly

Back 26

Cool down time before performing a shutdown

Front 27

What part of a impulse reaction blade has the reaction design

Back 27

The tip

Front 28

Can a technician use layout dye to Mark hot section turbine parts

Back 28

Yes

Front 29

The super alloy inconel is based on what two primary metals

Back 29

Nickel chromium

Front 30

What does Charles law state

Back 30

Volume of a gas is directly proportional to its temperature

Front 31

What is it called when a blade suffers from deformation caused by time, temperature in centrifugal force

Back 31

Creep

Front 32

What is an disadvantage to the radial inflow turbine

Back 32

Short service life

Front 33

High mass air flow engines will use which type of combustor Flow Design

Back 33

Through flow

Front 34

75% of the energy created in the combustion section is used to do what

Back 34

Move turbine and accessories

Front 35

What part of a turbine engine converts fluid flow into mechanical motion

Back 35

Turbine section

Front 36

The term flameout describes what condition

Back 36

Loss of the combustion flame due to various conditions

Front 37

What is a blucket

Back 37

Rotor when assembled on the disc are commonly referred to as a wheel

Front 38

Describe a shrouded turbine wheel

Back 38

When the wheel is assembled around the blade from a ring or shroud

Front 39

Which combustor design is the most efficient and lightest weights

Back 39

Annular type

Front 40

What two advantages does the fir tree attachment method provide the turbine blades

Back 40

Greater surface area for tensile strength, better heat transfer

Front 41

which type of combustor design has each fuel nozzle with its own inner liner, but share the outer case with the other

Back 41

Can annular

Front 42

What type of combusted would be considered single or double

Back 42

Annular

Front 43

Radial inflow turbine Wheels extract how much energy out of the exhaust gases

Back 43

Almost 100%

Front 44

In a turbine section, what is the first, the rotating component or the stationary

Back 44

Stationary

Front 45

What type of turbine wheel is not used in Flight engines

Back 45

Radial inflow

Front 46

The combustion chamber has the highest of what

Back 46

The largest increase in gas volume

Front 47

In a gas turbine engine, what specific section has the highest stress

Back 47

Turbine section

Front 48

75% of the air flow through the core of the turbine engine is used to perform what

Back 48

Cooling

Front 49

Stress rupture cracks usually go in what direction of the turbine blade

Back 49

Perpendicular

Front 50

Engineers can design combustor with two type of flow

Back 50

Through flow and reverse flow

Front 51

What are the advantages of through flow

Back 51

Is to allow the exhaust gas velocity to remain constant

Front 52

What is the advantage of reverse flow

Back 52

Allowed to make a shorter engine