Atp

Question 1

Mach number

Answer 1

Ratio of TAS to the speed of sound

Question 2

Taf TEMPO

Answer 2

Notable conditions but expected to last less than an hour

Greater than 50% chance of happening

Question 3

How many times a day does a taf cone out?

Answer 3

4 times
0z
06z
12z
18z

Question 4

What stage of a ts is a microburst in?

Answer 4

Mature

Question 5

Basics of jet engine operation

Answer 5

Intake
Compression
Combustion
Exhaust

Question 6

Inverter

Answer 6

Converts DC to AC for use by instrumnents and avionics

Question 7

Hot start

Answer 7

Too much fuel too early in the start process before enough air is conpressed. Interstage turbine temp exceeds manufactures prescribes starting limits

Question 8

Hung start

Answer 8

Light off occurs but the engine fails to reach idle RPM. EGT rises but RPM will hang. High altitide or hot, low density air

Question 9

Bleed air

Answer 9

Used for oressurization of the canin
Must be colled first by onvoard refriferation system
Pressurization, heating, deicing/anti-icing, pneumatic engine starting

Question 10

What is an accumulator?

Answer 10

A steel cylinder with a diagram in yhe middle. One half is fikled with nitrogen/air amd the otyer contains fluid. Tge purpkse is to store power.

Question 11

Thrust reversers

Answer 11

Most are capable of producing 45% of rated engine thrust in reverse direction. This adds 20% braking capability

Question 12

What is a difusser?

Answer 12

It directs air from the impeller to the manifold. Provides the combistion chamber with air at the correct belocity and pressure for max efficiency

Question 13

N1/N2

Answer 13

N1 speed of low pressure compressor/turbine spool

N2 speed of hogh pressure compressor and turbine spool

Question 14

Turbo fan

Answer 14

Modification of turbo jet engine
Higher thrust/less noise

Large air intakes
Compresor blades ahead of conpressor direct air backward party to compressor and partly through dicts tgat bypass the conpressor and flow between the outside of engine.

Question 15

Compressors

Answer 15

Supply compressed air to the burners

Increases the pressure of the mass of air that is channeled through the air inlet amd routes it to the burners
- as air is compressed it is heated - may reach 600f before combistion section

Question 16

Turnine engine components

Answer 16

Air inlet
Conpressor
Combistion section
Turbine
Exhaust 
Accesory section

Question 17

Stator

Answer 17

Row of non moving vanes attached to the inside of the conpresor case

Fit anugly next to rotors. Move incoming air

Question 18

Axial flow

Answer 18

Compresses air through a linear series of rotating and fixed blades

Avouds energy loss as a result changing directions. Airflow is parallel to the plane of rotation

Question 19

Compressor stalls

Answer 19

Compressor blades are actially small airfoils functuoning the same as a propeller or wing

Occurs when tge air mass traveling through the compressor slows down or stops.
First sign: low pulsating sound

Left long enough will result in the sound of a loud backfire
Severe stalls know as hung stalls will dramatically degrade engine output and might result in damage/engine failure

Question 20

Combistion chanbers

Answer 20

Raises the temperature of the compressed air that passes through and releases the potential energy in the fuel/air mixture. Most of the energy released turns the turbine wheel which is connected to a long shaft to the compressor.

The energy that remains after turning the turbine becomes a high velocity stream of hot gases that exit the exhaust providing forward thrust.
Temp of air leaving compressor 600f
After leaving combustion chamber 1600f

Question 21

Turbines

Answer 21

Purpose is to convert the energy of combustion chamber exhaust gases into mechanical energy to operate tge compressor and other accesories.

Ongoing concern on flight deck is thetemp if turbine
ITT Interstage Turbine temperature probe

Question 22

Exhaust section

Answer 22

Located directly behind tge rurbine section

Produces exhaust gas with a high velocity and minimizes exhaust gas turbukence
Exhaust cone and nozzle
- channels all exhaust gases as tgey are discharged from the turbine blades amd combines them into a single cohesive stream

Question 23

Swept wings

Answer 23

Lets the aircraft go faster by delaying the onset of the airfoils critical mach by allowing the relative airflow over its surface to move outward towards the wingtips so the air encounters less camber and does not accelerate as quickly over the top of the wing. Allows aircraft to reach a higher airspeed before critical mach is reached.