Term
| What type of boilers do we have? |
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Definition
| (2) 600 PSI "D" Type Boilers |
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Term
| What type of system do our boilers use? |
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Definition
| Accelerated natural circulation uncontrolled superheating boilers |
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Term
| Why are the boilers called "D" type? |
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Definition
| Due to the shape of the boiler tubes. |
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Term
| How many burners per boiler? |
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Definition
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Term
| What type of boiler blow downs are there? |
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Definition
Surface Blow Downs
Scum Blow Downs
Bottom Blow Downs
Soot Blow (not a blow down) |
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Term
| What is the pupose of a Surface Blow Down in reguards to boilers? |
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Definition
| Reduces the amount of materials dissolved in the boiler |
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Term
| What is the pupose of a Scum Blow Down in reguards to boilers? |
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Definition
| Can replace a weekly surface blow if chemistry does not require blow down |
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Term
| What is the pupose of a Bottom Blow Down in reguards to boilers? |
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Definition
| Removes sludge and solids from the water drum and lower headers of secured boiler |
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Term
| What is the pupose of a Soot Blow in reguards to boilers? |
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Definition
| Uses steam to blow soot off the tube surfaces. There are 7 blowers used for light off only |
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Term
| What force draft blowers do we have? |
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Definition
(2) Steam and (1) electric force draft blower per boiler provide air to support combustion in the boiler.
Electric force draft blower is used for light off only |
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Term
| What is the purpose of the steam and electric force draft blowers? |
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Definition
Provide air to support combustion in the boiler.
Electric force draft blower is used for light off only |
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Term
| How does the Automatic Boiler Controls operate and what are the 3 modes? |
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Definition
Operated by LP air
Automatic, Remote Manual, and Local Manual |
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Term
| Boiler Steam Drum Desuperheater to... |
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Definition
Force Draft Blower
Main Feed Pumps
Soot Blow Pump
Superheater Protection System
Emergensy Feed Pump
600-150 PSI Reducer |
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Term
| What Does 150 PSI Aux Steam supply |
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Definition
Steam Atomizing Steam
Emergency Feed Pump
Superheater Protection System
Lube Oil Purifier Heater
Lube Oil
Sttling Tank Heater
#2 FO Tank Stripping Pump
Rubber and Plastics
Reducers for Hotel Steam |
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Term
| What is the the first phase of the Basic steam cycle? |
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Definition
Generation Phase
-Boilers super heater, steam drum, water drum, economizer, furnace boiler safeties, Down Comers |
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Term
| What is the Second phase of the Basic Steam cycle? |
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Definition
Expansion Phase
HP Turbine, LP Turbine, Crossover Pipe, SSTG |
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Term
| What is the Third phase of the Basic Steam cycle? |
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Definition
Condensate Phase
Condenser, Condensate Pump, Air Ejectors, Main Circulation Pump, Scoop Injection Line, Overboard Line, Hot Well, Thermostatic Recirc |
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Term
| What is the Fourth phase of the Basic Steam cycle? |
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Definition
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Term
| What is the Deaerating Feed Tank (DFT)? |
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Definition
| DFT stores, deaerates, and preheats water to 250 degrees F. |
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Term
| What level is the DFT maintained at? |
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Definition
Maintained at 2150 gal
The system will pull or send make up feed to the “on service” feed tank as needed to maintain the level |
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Term
| Main Feed Booster Pump (MFBP) |
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Definition
3 Electric Motor Driven Pumps
Pump water from DTF to the suction of the Main Feed Pumps
Located on the fire room lower level |
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Term
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Definition
2 Steam Turbine Driven Pumps
Raise Pressure to approximately 800PSI to feed to the boilers
Located on the fire room operating level |
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Term
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Definition
| Heats incoming feed water before it enters the feed pipe to the steam drum to 350Fº |
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Term
| Ships Service Turbine Generator (SSTG) |
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Definition
| 2 for Ships Power, 2 for ships along side |
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Term
| How does the Ships Service Turbine Generator (SSTG) work? |
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Definition
5 stage pressure and velocity compounded impulse turbine
Convert thermal energy of to mechanical energy to spin turbines and induce a voltage to the stator to generate electric energy |
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Term
| What is the rating of the Ships Service Turbine Generator (SSTG) |
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Definition
2500kw
4009A
450V 3 phase AC at 60HZ |
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Term
| How is the Ships Service Turbine Generator (SSTG) cooled? |
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Definition
| Each SSTG has a condenser and an aux circ pump which provides cooling for the aux condenser, cooling for SSTG LO cooler, and cooling for the SSTG generator air box |
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Term
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Definition
8 Stage Pressure velocity compounding rateau turbine blade
Pressure is reduced through each stage before passing through the crossover pipe and into the ahead stages of the LP Turbine |
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Term
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Definition
Ahead Turbine
6 Stage impulse turbine
Astern Turbine
1 Stage pressure velocity compounding Impulse turbine
Flowpath
Steam enters the ahead stages from the crossover pipe and the astern stages via the astern throttle valve
Steam exhausts via the exhaust trunk to the main condenser |
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Term
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Definition
Used to turn over the main engine during warm up and cool down
Turning the turbine ensures that the shaft is heated evenly.
Due to the metal expanding when heated, uneven heating will cause the turbine shaft to bend/bow |
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Term
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Definition
Horizontal Tube and shell, single pass heat exchanger
Located beneath the LP Turbine
Uses seawater to cool and condense steam exhausted from the LP turbine |
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Term
| What are the 3 sources of Main Circulation Water? |
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Definition
Main Circ Pump- Electric motor driven, 2 speed pump that supplies water when traveling below 12 knots
Scoop Injection- aligned when the ships speed exceeds 12 knots
Firemain can be aligned to the condenser for emergency cooling |
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Term
| What is the purpose of Main Circulation? |
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Definition
Main circ water also cools main engine lube oil cooler
Main circ pump can also dewater the Engine Room bilge in an emergency |
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Term
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Definition
Take the high rotational speed of the turbines and converts it to a shaft speed
They are double reduction, double heilical articulated reduction gears.
The bull gear is the largest gear in the system |
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Term
| What are the two types of bearings? |
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Definition
Journal Bearings
Thrust Bearings |
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Term
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Definition
Supports the weight of all main engine components while allowing free rotation.
Metal to metal contact with lube oil and has no moving parts.
They are located forward and aft of the HP and LP turbine components |
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Term
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Definition
Used to transfer the thrust crated by the screw to the hull and move the ship
Rotation of the shaft pressurizes LO in between the pads and shaft collar to prevent overheating and wear
Pads tilt slightly to control pressure of LO |
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Term
| What are the different Shaft sections? |
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Definition
Thrust Shaft
Line Shaft
Stern Tube Shaft
Tail Shaft |
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Term
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Definition
| First section of the shaft, keyed to the bull gear |
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Term
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Definition
| Second section consists of all shafting from thrust shaft to stern tube shaft. Supported by line shaft bearings sealed at the engine room and fire room bulkhead by packing and stuffing boxes |
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Term
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Definition
| Third section which exits the hull and coupled to the line shaft by and inboard coupling. Shaft penetration is sealed by a syntron seal and inflatable seal ring and is supported by a water cooled bearing |
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Term
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Definition
| Last section of main shafting, completely exterior to the ship. Connected by an outboard coupling and supported by the strut bearing. |
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Term
| What in Engineering Requires COs Approval? |
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Definition
Hazwaste Discharge
Bypass Safeties
Certifying EOOW’s and Oil King
Deviating from normal plan ops/ restricted maneuvering
Engineering Drill Plans
Loading and unloading fuel
Main propulsion light off |
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Term
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Definition
1. 9,000 gal
2. 10,000 gal
3. 4,000 gal
4. 4,000 gal
5. 2,500 gal
Each pump room has 2 CHT pumps that discharge 100 GPM
4 Modes of CHT
In Port- Discharge to pier
Transit- Hold on station
At Sea- Discharge overboard after 12 NM
Cold Iron- system secured |
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Term
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Definition
1/3, 2/3, Standard, Full, Flank
Back 1/3, Back 2/3, Back Full
Speed is ordered to the throttleman via the engine telegraph or EOT |
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Term
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Definition
3-8 tom closed loop type system with recirc compressors.
Located below female berthing |
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Term
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Definition
3-250 ton york type centrifugal units.
Located in main control and uses R-236fa refrigerant |
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Term
| Emergency Diesel Generator (EDG) |
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Definition
| Fairbanks Morse 38 ND, 16 pistons, 8 cylinders opposed piston |
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Term
| What is the capacity of the EDG? |
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Definition
| 1,000 KW, 1604A, 60HZ, 400V AC |
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Term
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Definition
HP Air
After loss of power, a solenoid opens and sends HP air into the diesel for start up |
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Term
| What are the Components of the EDG? |
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Definition
| Cylinder block, starting mechanism, fuel shutdown, emergency shutdown, overspeed trip, governor, jacking gear |
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Term
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Definition
| Seawater cools the jacket water, which cools lube oil and the cylinders of the EDG |
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Term
| Where are the High-Pressure Air Compressor (HPAC) located? |
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Definition
| 3 Located on the operating level of the Fire Room |
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Term
| What do the HPACs supply? |
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Definition
| Provides air to the dive chamber, EDG air flask, and the Ship’s Whistle |
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Term
| Where are the HPAC dehydrators located? |
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Definition
| HPAC Dehydrators are located on the operating level of the fire room |
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Term
| Where are the Low-Pressure Air Compressor (LPAC)located? |
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Definition
| 3 located on the operating level of the Fire Room |
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Term
| What do the LPACs supply? |
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Definition
| Provide air to the automatic boiler Controls (ABC), and pneumatic tools |
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Term
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Definition
6 Stage Flash type
Heated by aux exhaust and flashes saltwater from the seawater pump to create distillant
Excessive salt (brine), is measured through salinity cells and expelled by the brine pump.
EVAPS each produce 50,000 gal per day |
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Term
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Definition
The ship can be steered from 5 locations
Helm (Bridge)
Trick Wheel (Aft Steering)
Hand Pump (Aft Steering)
Chain Fall (Aft Steering)
Ratchet ball assembly (Aft Steering) |
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Term
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Definition
Engineroom
1 S, 2S, 1SAS, 2SAS, Shore
EDG
Emergency Switchboard |
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