Engineering (DDG-78) || 100% Accurate Answers.
6 ways to stop engine correct answers Normal Stop/CD
Emergency Stop
Manual Stop
Fire Stop
Auto Shutdown
Compressor Stall
Normal Stop/CD Process correct answers -SCU drive PLA to idle, "normal stop" command to
UEC.
-After 5 mins --> UEC commands MFV's closed
-PT brake applied automatically when PT speed decreases to 500RPM.
Emergency Stop Process correct answers -SCU sends "emergency stop" signal to UEC
-MFV's close (no wait)
-PT brake applied automatically when PT speed decreases to 500RPM.
Manual Stop Process correct answers -GTM idle for 5 mins
-Depress "emergency stop" pushbutton
Fire Stop correct answers Halon Release
Air Molecule to Ship Movement correct answers Louvers
Anti-Icing Manifolds
Dirty Side
Aglometer
Clean Side
Blow-in Doors
Silencers
Inlet Plenum
16 stage axial flow compressor
30-nozzle annular combustor
2 stage HP turbine
Aerodynamic Coupling
6 stage PT/LPT
High Speed Flexible Coupling
PT Brake
SSS Clutch
1st reduction pinion
1st reduction gear
2nd reduction pinion
2nd reduction gear (bull gear)
pinion
Shaft
Screws
, LOSCA purpose, explain correct answers - Filters, cools, deaerates and stores LM 2500 synthetic
L/O (23699) for GTM
- One LOSCA per GTM, gravity-feeds
- GTM L/O scavenge pump delivers oil back to LOSCA
- Heat exchanger uses 2190 L/O as cooling medium
F/O Service System correct answers 21 storage tanks (6 groups) --> heater --> purifier -->
suction/discharge --> service tanks --> pumps --> unloader valve service heater --> pre-filter -->
coalescer
L/O Service System correct answers Pumps (2E, 1A) --> duplex filter --> L/O cooler -->
unloading valve --> LOSCAs
MRG reduction ratio, bearings, L/O correct answers 21.35:1
30 bearings (26 journal, 4 thrust)
#22 most remote (pressure monitoring)
2190 L/O
MRG Characteristics correct answers Double Input/Single Output
Double Reduction
Locked Train
Articulated (first reduction gear coupled to second reduction pinion via quill shaft
Double Helical
MRG Attachments correct answers Attached L/O Pump
Attached CRP Pump (outboard)
Tachometer
Turning Gear/Shaft Locking Device
Vent Fog Precipitator
Dehumidifier
PT Brake function correct answers Holds PT stationary
- drives PLA to idle, pitch to 0, applies PT brake
SSS function correct answers Input > output = engaged
Bleed Air System uses correct answers Start air (HP start air reducers utilized)
Prairie Air (props)
Masker Air
Anti-Icing system
CRP System components correct answers Sumps--> Attached pump / Electric Pump --> HOPM
(Control/Power Oil) --> OD Box --> Shafting --> (Head Tank) --> Props (5 nickel-aluminum-
bronze alloy blades)
6 ways to stop engine correct answers Normal Stop/CD
Emergency Stop
Manual Stop
Fire Stop
Auto Shutdown
Compressor Stall
Normal Stop/CD Process correct answers -SCU drive PLA to idle, "normal stop" command to
UEC.
-After 5 mins --> UEC commands MFV's closed
-PT brake applied automatically when PT speed decreases to 500RPM.
Emergency Stop Process correct answers -SCU sends "emergency stop" signal to UEC
-MFV's close (no wait)
-PT brake applied automatically when PT speed decreases to 500RPM.
Manual Stop Process correct answers -GTM idle for 5 mins
-Depress "emergency stop" pushbutton
Fire Stop correct answers Halon Release
Air Molecule to Ship Movement correct answers Louvers
Anti-Icing Manifolds
Dirty Side
Aglometer
Clean Side
Blow-in Doors
Silencers
Inlet Plenum
16 stage axial flow compressor
30-nozzle annular combustor
2 stage HP turbine
Aerodynamic Coupling
6 stage PT/LPT
High Speed Flexible Coupling
PT Brake
SSS Clutch
1st reduction pinion
1st reduction gear
2nd reduction pinion
2nd reduction gear (bull gear)
pinion
Shaft
Screws
, LOSCA purpose, explain correct answers - Filters, cools, deaerates and stores LM 2500 synthetic
L/O (23699) for GTM
- One LOSCA per GTM, gravity-feeds
- GTM L/O scavenge pump delivers oil back to LOSCA
- Heat exchanger uses 2190 L/O as cooling medium
F/O Service System correct answers 21 storage tanks (6 groups) --> heater --> purifier -->
suction/discharge --> service tanks --> pumps --> unloader valve service heater --> pre-filter -->
coalescer
L/O Service System correct answers Pumps (2E, 1A) --> duplex filter --> L/O cooler -->
unloading valve --> LOSCAs
MRG reduction ratio, bearings, L/O correct answers 21.35:1
30 bearings (26 journal, 4 thrust)
#22 most remote (pressure monitoring)
2190 L/O
MRG Characteristics correct answers Double Input/Single Output
Double Reduction
Locked Train
Articulated (first reduction gear coupled to second reduction pinion via quill shaft
Double Helical
MRG Attachments correct answers Attached L/O Pump
Attached CRP Pump (outboard)
Tachometer
Turning Gear/Shaft Locking Device
Vent Fog Precipitator
Dehumidifier
PT Brake function correct answers Holds PT stationary
- drives PLA to idle, pitch to 0, applies PT brake
SSS function correct answers Input > output = engaged
Bleed Air System uses correct answers Start air (HP start air reducers utilized)
Prairie Air (props)
Masker Air
Anti-Icing system
CRP System components correct answers Sumps--> Attached pump / Electric Pump --> HOPM
(Control/Power Oil) --> OD Box --> Shafting --> (Head Tank) --> Props (5 nickel-aluminum-
bronze alloy blades)
