Engineering Flashcards
How many GTMs do we have onboard/per engineroom PHM?
4/2
What is the full name of the GTM’s?
General Electric LM 2500 Gas Turbine Engine
What does LM stand for?
Land Marine
What type of compressor does the LM 2500 have and how many stages is it?
Axial Flow Compressor/16 Stages
What type of combustor does the LM 2500 have?
Annular Combustor
How many nozzles does the LM 2500 have?
30
How many stages does the LP Power Turbine have?
6 Stages
How many stages does the HP Power Turbine have?
2 Stages
What does AGB stand for?
Accessory Gear Box
Name the equipment mounted on the AGB
Main Lube Oil Pump, Lube Oil Scavenge Pump, Fuel Pump, Starter, Air/Oil Separator
How many Horsepower is each LM 2500 capable of?
25000 HP Each
What does MRG stand for?
Main Reduction Gear
What is the purpose of the MRG?
Takes the high speed low torque of the LM 2500s and converts it to low speed high torque.
WHAT ARE THE 6 EXTERIOR COMPONENTS ATTACHED TO THE MRG?
LUBE OIL ATTACHED PUMP, CRP ATTACHED PUMP, SHAFT TURNING GEAR, LOCK SHAFT DEVICE, DEHUMIDIFIER, OD BOX
WHAT IS THE CLASSIFICATION OF THE MRG?
DOUBLE INPUT, SINGLE OUTPUT, DOUBLE REDUCTION, DOUBLE HELICAL, LOCKTRAIN, ARTICULATED
DEFINE EACH OF THE 6 PARTS OF THE CLASSIFICATION.
DOUBLE INPUT IS TWO LM2500’S GOING INTO THE MRG.
SINGLE OUTPUT IS ONE SHAFT COMING OUT OF THE MRG.
DOUBLE REDUCTION IS MRG HAS FIRST REDUCTION GEARS AND A SECOND REDUCTION GEAR TO REDUCE TWICE.
DOUBLE HELICAL IS THE ANGLE OF THE GEAR TEETH IN A “V” SHAPE TO REDUCE NOISE.
LOCKTRAIN IS WHEN ONE GEAR MOVES ALL GEARS MOVE.
ARTICULATED MEANS GEARS ARE OFF SET SO A GEAR TOOTH DOES NOT MESH IN THE SAME SPOT ALL THE TIME, PREVENTS UN-EVEN WEAR.
WHAT IS THE PURPOSE OF A THRUST BEARING?
ABSORBS THE AXIAL THRUST OF THE SHAFT AND TRANSMITS IT TO THE HULL OF THE SHIP
HOW MANY THRUST BEARINGS DO WE HAVE AND WHERE ARE THEY LOCATED?
2/STBD SHAFT IN AUX2, PORT SHAFT IN SHAFT ALLEY
WHAT IS THE PURPOSE OF A LINE SHAFT BEARING?
ABSORBS THE RADIAL THRUST OF THE SHAFT, PREVENTS BOWING OF THE SHAFT
HOW MANY LINE SHAFT BEARINGS DO WE HAVE AND WHERE ARE THEY LOCATED?
3/ONE IN MER2, TWO IN SHAFT ALLEY
WHAT IS THE MRG RATIO?
21.35 TO 1
WHAT IS THE LEGNTH OF THE STBD AND PORT SHAFTS?
STBD: 228 FEET, PORT: 168 FEET
WHAT ARE THE THREE FUNCTIONS OF 2190 TEP LUBE OIL?
LUBERICATION, HYDRAULIC, COOLING
WHAT DOES 2190 TEP MEAN?
2 SERIES OIL WITH A 190 VISCOSITY, TURBINE EXTREME PRESSURE
WHAT IS THE PURPOSE OF THE MRG LUBE OIL SYSTEM?
TO LUBERICATE THE MRG
WHAT IS THE PURPOSE OF THE SYNTHETIC LUBE OIL SYSTEM?
PROVIDES 23699 SYNTHETIC LUBE OIL TO THE LM 2500’S
WHAT TYPE OF OIL IS USED IN THE SYNTHETIC LUBE OIL SYSTEM?
23699 SYNTHETIC LUBE OIL
WHAT ARE THE THREE MAJOR HAZARDS ASSOCIATED WITH 23699 SYNTHETIC LUBE OIL?
DERMITITIS, PARALYSIS, CANCER
WHAT DOES CRP STAND FOR?
CONTROLABLE REVERSABLE PITCH
WHAT IS THE PURPOSE OF CRP?
ALLOWS THE SHIP TO GO IN THE REVERSE DIRECTION WITHOUT CHANGING THE ROTATIONAL DIRECTION OF THE SHAFT.
WHAT TYPE OF OIL DOES THE CRP SYSTEM USE?
2190 TEP LUBE OIL
WHAT DOES HOPM STAND FOR?
HYDRAULIC OIL POWER MODULE
WHAT IS THE PURPOSE OF THE HOPM?
DIVIDES CRP OIL INTO CONTROL AND POWER OIL
WHAT IS THE FUNCTION OF CONTROL OIL?
ACTUATES THE VALVE ROD, WHICH CONNECTS TO THE HUB ASSEMBLY
WHAT IS THE FUNCTION OF POWER OIL?
ACTUATES THE PROPELLER BLADE MOVEMENT
WHAT DOES “OD” STAND FOR WHEN REFERRING TO THE OD BOX?
OIL DISTRIBUTION
HOW MANY GRAVITY HEAD TANKS DO WE HAVE AND WHERE ARE THEY LOCATED?
3/ MER1, MER2, 3 GEN
WHAT IS THE PURPOSE OF THE GRAVITY HEAD TANKS?
THE NORMAL SUPPLY OF FUEL FOR YOUR GTG’S AND ALLOWS FOR A 5 MINUTE COOLDOWN PERIOD FOR THE GTM’S IN AN EMERGENCY
HOW MANY FUEL SERVICE TANKS DO WE HAVE?
4 TOTAL, 2 PER ENGINE ROOM
HOW MANY FUEL STORAGE TANKS DO WE HAVE?
19
WHAT IS THE FLASHPOINT FOR ALL NAVY FUELS?
140 F
WHAT ARE THE 2 TYPES OF FUEL ON BOARD PHM?
F-76 AND JP-5(F-44)
IN AN EMERGENCY SITUATION, CAN JP-5 BE USED AS A SUBSTIUTE FOR F-76?
YES
WHAT IS THE PURPOSE OF THE FUEL COALESERS?
FILTERS OUT WATER AND SMALL SEDIMENT
WHAT IS THE PURPOSE OF THE FUEL PRE-FILTERS?
FILTERS OUT LARGE PARTICULATE MATTER/SEDIMENT
WHAT ARE THE 4 FUNCTIONS OF BLEED AIR?
START AIR, PRAIRIE AIR, ANTI-ICING, MASKER AIR
WHAT IS THE PURPOSE OF MASKER AIR?
MASKS THE SHIP’S MACHINARY NOISE
WHAT IS THE PURPOSE OF PRAIRIE AIR?
MASKS THE SHIP’S PROPELLER NOISE, DISGUISES SHIP’S SIGNATURE
WHAT STAGE OF THE COMPRESSOR ON THE LM 2500 SUPPLIES CUSTOMER BLEED AIR?
16TH STAGE
WHAT STAGE ON THE ALLISON 501 K-34 COMPRESSOR SUPPLIES CUSTOMER BLEED AIR?
14TH STAGE
HOW MANY MASKER AIR EMITTER BELTS DO WE HAVE AND WHERE ARE THEY LOCATED?
3/ LOCATED UNDERNEATH THE SHIP
WHAT DOES LPAC STAND FOR?
LOW PRESSURE AIR COMPRESSOR
HOW MANY LPAC’S DO WE HAVE AND WHERE ARE THEY LOCATED?
3/ ONE IN MER1, TWO IN MER2
WHAT ARE THE 4 MODES OF THE LPAC?
LEAD(125 MODE), LAG(120 MODE), STAND BY(115 MODE), SHORE AIR(90 MODE)
WHAT TYPE OF ENGINE SERVES AS THE PRIME MOVER FOR THE GENERATOR?
ALLISON 501 K-34 MOD. 9130
WHAT TYPE OF COMPRESSOR DOES THE ALLISON 501 K-34 HAVE AND HOW MANY STAGES DOES IT HAVE?
AXIAL FLOW TYPE COMPRESSOR/ 14 STAGES
WHAT STAGES ON THE COMPRESSOR SUPPLIES BLEED AIR?
5TH, 10TH, 14TH
WHAT TYPE OF CUMBUSTOR DOES THE ALLISON 501 K-34 HAVE?
CAN-ANNULAR
HOW MANY FUEL NOZZLES DOES THE ALLISON 501 K-34 HAVE?
6
HOW MANY STAGES DOES THE POWER TURBINE HAVE ON THE ALLISON 501 K-34?
4
WHAT IS THE GENERATOR RATED AT?
450 VOLTS, 60 HZ, 3,000 KW, 4,800 AMPS, 3 PHASE, .8 POWER FACTOR
WHERE ARE THE GTG’S LOCATED?
AUX1, MER2, 3GEN
HOW MANY SWITCHBOARDS DO WE HAVE AND WHERE ARE THEY LOCATED?
3/ AUX1, MER2, 3GEN
WHICH SWITCHBOARD IS THE ONE FOR SHORE POWER?
2 SWITCHBOARD
HOW MANY SHORE POWER BREAKERS DO WE HAVE?
12
NORMALLY, HOW MANY SHORE POWER CABLES DO WE USE INPORT?
10
WHAT IS EACH SHORE POWER CABLE RATED AT?
400 AMPS EACH
HOW MANY LOAD CENTERS DO WE HAVE?
22
WHERE CAN YOU CONTROL THE GTG FROM?
CCS@EPCC, SWITCHBOARD, LOCALLY@FADAC LOCOP
HOW MANY A/C PLANTS DO WE HAVE ON BOARD? AND WHERE ARE THEY LOCATED?
5 / #1 & 1A INAUX 1,
#2 & #3 IN AUX 2
#4 SHAFT ALLEY
WHAT TYPE OF A/C PLANTS DO WE HAVE ON BOARD?
200 TON CENTRIFUGAL YORK
WHAT IS THE PRIMARY PURPOSE OF THE A/C PLANTS?
COOLING ELECTRONIC EQUIPMENT
HOW MANY CHILL WATER EXPANSION TANKS DO WE HAVE ON BOARD? WHERE ARE THEY LOCATED?
3 / #1 AUX 1
# 2 AUX 2
#3 SHAFT ALLEY
HOW MANY REFIGERANT PLANTS DO WE HAVE ON BOARD? WHERE ARE THEY LOCATED?
2 / REEFER DECKS
WHAT TYPE OF REFIRGERATION PLANTS DO WE HAVE?
1 ½ TON ROTARY VANE
WHAT ARE THE 5 PARTS OF THE REFRIGERATION CYCLE?
RECEICER, TXV, EVAPORATOR, COMPRESSOR, CONDENSER
WHAT TYPE OF DISTILLING PLANTS DO WE HAVE ON BOARD?
REVERSE OSMOSIS
WHAT DO WE USE TO TREAT THE WATER?
BROMINE
WHAT ARE THE 3 WAYS TO TREAT THE WATER?
INLINE BROMINATOR, RECIRC BROMINATOR, AND THE BATCH METHOD USING HTH
HOW MANY GALLONS PER DAY CAN EACH R.O. MAKE?
12,000 GALLONS PER DAY
HOW MANY POTABLE WATER TANKS DO WE HAVE? WHERE ARE THEY LOCATED?
4 / 1 & 3 AUX 1, 2 & 4 FORWARD POWER CONVERSION ROOM