Quiz 4 Powerplant

Question 1

how many pounds of thrust do our engines produce

Answer 1

4,660

Question 2

the -50 R engines are ____ _____ to an altitude prescribed by the AFM

Answer 2

flat rated

Question 3

What does flat rated mean

Answer 3

an engine of high horsepower rating is constrained to a lower horsepower rating

Question 4

what is spool

Answer 4

twin stool engine compressor and turbine connected on a single shaft - we have two (N1 and N2)

Question 5

Axial flow

Answer 5

low pressure compressor - 4 rows of compressors and 4 rows fo stators

Question 6

what is the difference between compressors and stators

Answer 6

compressors move and stators are stationary

Question 7

what does the accessory drive run

Answer 7

oil pump
fuel pump - high pressure
starter/generator
alternator
fuel control unit
hydraulic pump

Question 8

what drives the accessory case

Answer 8

N2 through tower shaft

Question 9

for the Digital Electronic Control (DEEC) the ENG CMPTR should always be in the ______ position during normal operation

Answer 9

AUTO

Question 10

The Digital Electronic Engine Control (DEEC) receives inputs from

Answer 10

engien inlet pressure
engine inlet temperature
interstage turbine temp (ITT)
N2 and N1 speeds
power lever angle (PLA)

Question 11

what do the 6 inputs to the DEEC allow it to do

Answer 11

schedule, govern, and limit the engine

Question 12

If the DEEC is running to fast what will happen

Answer 12

it will shut down

Question 13

what does the fan do

Answer 13

it moves a large volume of air into bypass duct and engine core
its the thing you can see at the front of the turbine engine

Question 14

Low pressure spool N1

Answer 14

consists of axial flow compressor and low-pressure turbine mounted on a common shaft

Question 15

High pressure spool N2

Answer 15

centrifugal compressor driven by turbine on a concentric shaft

Question 16

Combustion Chamber (can)

Answer 16

The fuel in the chamber atomizes fuel (turnes into a mist) and is put into the can through 12 nozzles and igntied by 2 igniter plugs

Question 17

Turbine section

Answer 17

4 turbine wheels (1 high pressure (N2) and 3 low pressure (N1)) and 4 stator assemblies

Question 18

what are the Engine limits for max takeoff thrust for 5 minutes

Answer 18

N1 - 100
N2 - 101
Max ITT in C - 1022

Question 19

for HP Cokcs = when closed they

Answer 19

mechanically lock the thrust levers in the full idle position

Question 20

for HP Cokcs = what connects to isolate fuel and hydraulic supplies

Answer 20

cable

Question 21

what do the red warning light on each thrust lever indicate

Answer 21

fire in that respective engine

Question 22

engine start first callouts

Answer 22

Start
N2 (at 12% and N1 rotation without making a call HP cock up)
Ignition
fuel flow
ITT
N1
(at 49 psi) Oil

Question 23

the automatic power reserve (APR) may allow an automatic increase in _________ in the event of an _________

Answer 23

engine thrust
engine failure

Question 24

the automatic power reserve (apr) in the auto mode will

Answer 24

activate when there is an uncommanded split in N2 occurs of 15% or more

Question 25

how many positions are there for ignition and what are they

Answer 25

3 positions
on
off
auto

Question 26

for the ignition position which will we normally operate on

Answer 26

auto

Question 27

when will an uncommanded igntion activation happen

Answer 27

500 RPM dop in N2

Question 28

are their oil filter and fuel filter annunciators

Answer 28

oil filter - no annunciator
fuel filter - do get annunciator