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40 Cards in this Set
- Front
- Back
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How many engineering space are there onboard |
8 Fwd vcht Aux 1 Aux 2 Mer 1 Mer 2 Shaft alley 3 gen room Aft steering |
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How many fire pumps are onboard |
6 Fwd vcht Aux 1 Mer 1 Mer 2 Shaft alley 3 gen room |
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How many sea water pumps are there onboard |
5 swp Aux 1 Aux 2 Mer 1 Mer 2 Shaft alley |
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What 2 types of oil do we use |
2190 temperature extreme pressure(mrg lube oil system crp system) 23699 synthetic lube oil (gtm gtg) |
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What does SPAM stand for |
Start air. Used to start engines. Gtg/gtm Paririe air. Used to mask the noise of propellers Anti icing. Used to prevent ice formation in our air inlet ducting Masker air. Used to mask the noise of the machinery spaces there are 3 emitter belts located in Aux 1 Mer 1 Mer 2 |
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How many gtm are onboard |
4 1a and 1b Mer 1 2a and 2b Mer 2 |
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What are the 5 components of the lm 2500 gtm |
Inlet 16 stage compressor 2 stage hp turbine 6 stage LP turbine Hsfc (high speed flexible coupling) |
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What is the process of an air molecule going through the entire cycle start to finish |
Loovers Anti icing Agglomerator Filters/BMD Silencers Fod screen 16 stage compressor Combustor 2 stage hp turbine Aero dynamic coupling 6 stage LP turbine Mixing room(bliss) |
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What kind of Shaft construction does the lm 2500 have |
Slipt Shaft Fwd Shaft is used for the compressor Combustor and 2 stage hp turbine Sft shaft is used for the 6 stage LP turbine |
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What is the Aero dynamic coupling |
It means there is no mechanical connection between two shafts |
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What does bliss stand for |
Boundary layered infrared suppression system. Reduces heat signature |
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What is the purpose of bid |
Blow in doors open open when the Agglomerator Filters get clogged to allow a smooth flow of unfiltered are to the engine to prevent it from stalling and or turning off. |
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What is a LOSCA used for |
4 LOSCA(lube oil storage and conditioning assembly) 1 per gtm Store and condition 23699 synthetic L/O. 23699 is cooled I shell and tube type cooler using 2190(in the shell) as a cooling medium. |
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How many gtg do we have onboard |
3 gtg Aux 1 #1 Mer 1 #2 shore power 3 gtg room # 3 |
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What type of Shaft construction does the Allison 501-k34 |
Single Shaft |
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How many stages of compressor blades do our gtg have |
14 stage compressor |
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Do our gtg have Silencers in the air inlet section |
No |
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How many mrg do we have onboard |
2 mrg Mer 1 Mer 2 |
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What is the mrg reduction ratio |
21.34:1 |
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What are the 6 characteristics of our mrg |
Double input 2 gtm going to 1 mrg Single output 1 Shaft coming out Doble reduction 2 step reduction Double helical angle the gears are positioned Articulated gears are sharply cut to prevent noise and variation Locked train 1 gear moves they all move |
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What the purpose of our mrg |
Converts high speed low torque in to low speed high torque |
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What is the purpose of a bulkhead Shaft seal and where are they located |
They prevent progressive flooding, they are located in spaces in which the port and stbd shaft run through |
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How many Thrust bearings are there and what is their locations |
bearings 2 thrust bearings Shaft alley Aux 2 Shaft alley Aux 2 |
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What is the purpose of the thrust bearings |
They transfer thrust from the Shaft aft of the thrust bearing to the hull of the ship. Protects the mrg |
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What is the purpose of a line Shaft bearing |
They support the shaft |
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How many line Shaft bearing and what are their locations |
There are three 1a Mer 2 2a shaft alley 1b Shaft alley |
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What is the purpose of a Stern tube seal and how are they pressurized |
2 tube seals Port stbd seals in Shaft alley Prevents s/w from flooding the space Primarily pressurized s/w emergency pressurized with co2 or LP air If emergency prussurization is used the affected Shaft must be locked to prevent damage to emergency stern tube seal. |
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What is the purpose of of a strut bearing |
Supports aft end of Shaft outside the skin of the ship. Lubricated by sea water |
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How many blades are on each propeller |
5 |
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What is Paririe air used for |
Masks the noise of the blades cutting through the water by air emitted though holes on the blades tips |
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How many mrg lube oil pumps are there per mrg |
3 pumps 2 electrical driven pumps and 1 mrg attached pump |
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How is 2190 tep cooled |
2190 tep cooled in a shell and tube type cooler using sea water as cooling medium |
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What does crp stand for and what is its purpose |
Controllable reversible pitch The shaft only spins in one direction so we rotate the angle of the blades to reverse the ship |
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What 2 roles does 2190 tep play in the crp system |
Control oil Power oil |
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What is the purpose of control oil Power oil |
In the oil distribution box, control oil spill used to move a hydraulic piston which either restricts or promotes the amount of power oil traveling down the shaft to the propeller Power oil arrives in the propeller |
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What is the purpose of the hydraulic oil Power module |
The hydraulic oil Power module is the heart the crp system and supplies both power and control oil for systems demands |
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How many crp pumps are there |
2 pumps electrical pump and mrg attached pump |
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What are the parameters for LP air, mp air and hp air |
0-150 151-1000 1001+ |
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What does LPAC stand for and how many do we have |
Low pressure air compressor 3 LPAC #1 Mer 1 #2 & 3 Mer 2 |
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What are the modes of a LPAC |
Lead the 115-125 psi Lag 110-120 psi Stand by 105-115 psi |
