-
how many and what type of boilers do we have?
- 1 600 PSI D type.
- called d type due to the shape
-
how many burners are their per boiler?
3
-
this reduces amount of materials dissolved in the boiler water.
surface blowdowns
-
This can replace a weekly surface blow if chemistry does not require blowdown.
Scum Blow
-
Removes sludge and solids from the water drum and lower headers of secured boiler.
bottom blow
-
This uses steam to blow soot off the tube surfaces. NOT A BLOWDOWN
soot blow
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how many blowers are their per boiler
7
-
how many and what type of force draft blowers are their per boiler
2 steam and 1 electric per boiler
-
what is the function of the force draft blowers
provides air to support combustion in the boiler
-
what is the electric force draft blower used for?
light off only
-
what is Automatic Boiler control operated by?
LP Air
-
what are the three modes of automatic boiler control?
- automatic
- remote manual
- local manual
-
What are the 8 components of the generation phase?
- boilers
- superheaters
- steam drum
- water drum
- economizer
- furnace
- boiler safeties
- down comers
-
what are the 5 components of the expansion phase?
- HP Turbine
- LP Turbine
- Crossover Pipe
- SSTG
-
What are the components of the condensate phase?
- Condenser
- Condensate pumps
- Air ejector
- Main Circ pump
- Scoop Injection Line
- Overboard line
- hot well
- Thermostaticf recirc
-
What are the 3 components of the feed phase?
-
What are the phases of the basic steam cycle in order?
- Generation
- Expansion
- Condensate
- Feed
-
what is 600 PSI Aux steam used for (6 items)?
- Force draft blower
- main feed pumps
- Soot blow piping
- Superheater protection system
- emergency feed pump
- 600-150 psi reducer
-
what is 150 PSI Aux steam used for (7 items)?
- emergency feed pump
- super heater protection system
- LO purifier heater
- LO settling tank heater
- #2 FO tank stripping pump
- Rubber and plastics
- Reducers for hotel steam
-
what is the purpose of the Deaerating feed tank?
stores, deaerates and preheats water to 250 degree farenheit
-
how many gallons are maintained in the DFT?
2150 Gallons
-
what is the function of the main feed booster pumps?
electric motor driven pumps used to pump water from the DFT to the suction of the Main feed pumps
-
how many Main feed booster pumps are there and what are they used for?
- 3
- fire room operating level
-
this heats incoming feed water before it enters the feed pipe to the steam drom to 350 degrees.
economizer
-
how many SSTG's are their and what do they service?
- 4
- 2 for ship along side
- 2 for ship power
-
these converts thermal energy to mechanical energy which spins turbines and induces voltage to the stator to generate energy.
SSTG
-
what are the stats of the SSTG's as it relates to:
Amps
Kw
volts
Hz
AC phase
- 4009 amps
- 2500 Kw
- 450 volts
- 60 hz
- 3 phase AC
-
what is the HP turbine used for?
ahead propulsion only
-
what is the LP turbine used for?
astern propulsion (has ahead turbine element)
-
Describe the HP turbine
8 stage rateau turbine blade
-
describe LP turbine
6 stage impuse turbine
-
this is used to turn over the main engine during warm up and cool down
Jacking gear
-
this is a horizontal tube and shell single pass heat exchanger. Located beneath the LP turbine it uses seawater to cool and condense steam exhausted from the LP turbine
Main condenser
-
Main circ water can come from what 3 sources
- main circ pump (below 12 knots)
- Scoop injection (over 12 knots)
- fire main (for emergency)
-
this is used to cool main engine lube oil via the lube oil cooler, can also dewater the engine room bilge in an emergency.
Main circ water
-
this takes high rotational sppe of the turbines and converts it to a shaft speed.
Reduction gears
-
what type of reduction gears do we have?
double reduction, double helical articulated reduction gear
-
what is the largest reduction gear in the system?
bull gear
-
this supports the weight of all main engine components while allwing free rotation of the components
journal bearing
-
where are the journal bearings located?
forward and aft of HP and LP turbine components
-
this is used to take up thrust trasmitted to the shaft
thrust bearings
-
what are the four sections of the shaft?
- Thrust shaft
- line shaft
- Stern tube shaft
- Tail shaft
-
this is the first section of shaft keyed to the bull gear
thrust shaft
-
this is the second section of the shaft. supported by the line shaft bearing sealed at the engine room and fire room bulkhead by packing and stuffing.
line shaft
-
3rd section of the shaft, exits the hull and coupled to the line shaft.
Stern tube shaft
-
how is the stern tube shaft sealed and supported at penetration?
sealed by a syntron seal and inflatable seal ring. supported by a water cooled bearing
-
last sesction of the main shaft. completely exterior to the shift. supported by the strut bearing
tail shaft
-
What are the 7 CO approvals for Engineering?
- Hazwaste discharge
- Bypassing safeties
- certifying EOOW's and oil king
- Deviating from normal pln ops/ restricted manuvering
- Engineering drill plans
- loading and unloading fuel
- min propulsion light off
-
list CHT pumprooms and how many gallons for each
- PR 1- 9000 gallons
- PR 2- 10000 gallons
- PR 3- 4000 gallons
- PR 4- 4000 gallons
- PR 6- 2500 gallons
-
how many CHT pumps are there and how many GPM does each pump discharge?
- 2 CHT pumps per pumproom
- 100 GPM
-
what are the 4 modes of CHT and when how are they used?
- In port- discharge to pier
- Transit- Hold on station
- At sea- discharge overboard after 12 NM
- Cold iron- system secured
-
what are all the ship speeds?
- 1/3
- 2/3
- standard
- full
- flank
- back 1/3
- back 2/3
- back full
-
how is ship speed ordered?
ordered to the throttleman via the engine order telegraph (EOT)
-
what type of refrigeration units, how many are there, and where are they located?
- 3
- 8 ton closed loop type system with recirc compessors
- located below expeditionary manning berthing
-
how many ac units do we have, what type, and where are they located?
- 3
- 250 ton york type centrifugal units
- located in main control
-
what type of refrigerant is used in the AC units?
R236fa
-
what type of EDG is onboard?
fairbanks morse 38ND
-
describe EDG components.
- 16 pistons
- 8 cylinders opposed pistion
- two fuel trips to secure fuel during an emergency (at entrances)
-
how is the EDG started?
- HP air
- after loss of power a solenoid opens and sends HP air into the diesel for startup
-
what are the rating for the EDG in relation to:
Amps
Kw
AC Volts
Hz
- 1604 amps
- 1000 Kw
- 440 volt AC
- 60 hz
-
what are the 7 components of the EDG
- cylinder block
- starting mechanism
- fuel shutdown
- emergency shutdown
- overspped trip
- governor
- jacking gear
-
How is the EDG cooled?
Seawater cools the jacket water, jacket water cools lube oil and cylinders of EDG
-
how many HPAC's are there and where are thy located?
- 3
- operating level of the fire room
-
what 3 systems does HPAC provide air to?
- dive chamber
- EDG air lask
- Ship's whistle
-
How many LPAC's are their and where are they located?
- 3
- operating level of the fire room
-
what two systems does LPAC provide air to?
- automatic boiler controls
- portable tools
-
what type of EVAPS are onboard and how many?
-
these receive heat from aux exhaust and flashes saltwater from the sea water pump to create distillant. Excessive salt, or brine, is measured through salinity cells and expelled by the brine pump.
EVAPS
-
how many gallons of water does each EVAP produce per day?
50,000 gallons
-
how many gallons of potable water do the tanks hold?
107,936 gallons
-
how many gallons of feed water do the tanks hold?
47,470 gallons
-
what are the 5 locations the ship can be steered from?
- Helm
- Trick wheel
- Hand pump
- Chain Fall
- Ratchet ball assembly
-
what three methods of steering are located in aft steering?
- Trick wheel
- hand pump
- racket ball assembly
-
what 5 switchboards are located in the engine room?
-
What switchboard is loacted in the EDG
emergency switchboard
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