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79 Cards in this Set
- Front
- Back
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what is the length of the ship?
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636 ft
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length of the beam?
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108 ft
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Navigational draft
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30ft
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Displacement tons?
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18,400 tons
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top speed (knots)
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20 knots
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state the type and how many air conditions plants do we have onboard
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six, 250-ton centrifugal chill water A/C plants that operate with R-114 type refrigerant.
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state the type and how many refrigeration units we have onboard
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Two, 8-ton reciprocating refrigeration plants that operate with R-134A type refrigerant.
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What is the purpose of a Compressor?
A/C |
Compresses refrigerant into a high pressure gas: moves refrigerant through the refrigeration cycle.
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What is the purpose of a chill water pump?
A/C |
Circulates the chilled water throughout the ship then back to the A/C plants.
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What is the purpose of a Condenser?
A/C |
Condenses the compressed refrigerant into a liquid state. Seawater in tubes cools the refrigerant outside the tubes. The vapor condenses into liquid.
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What is the purpose of a Receiver?
A/C |
Storage area (tank) for liquid refrigerant after being condensed. Also, when maintenance or repairs are made, the unit is pumped down which returns and stores all the regrigerant to the reciever.
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What is the purpose of the freeze box?
A/C |
Used for the preservation and storage of frozen stores.
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What is the purpose of the chill box?
A/C |
Used for the preservation and storage of stores requiring refrigeration and humidity control and for thawing frozen stores.
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What is the Thermal expansion valve?
A/C |
Regulates the amount of refrigerant admitted into the evaporator.
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Purpose of comminutors?
CHT |
Waste passes through and is broken down by metal teeth prior to entering holding tanks.
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Purpose of the holding tanks and how many do we have onboard?
CHT |
Temporary storage areas for wasste. Used while in port and when transiting withing 12 nautical miles of land. 4 tanks toatls. Two 9000 gallon tanks fwd. two 12000 gallon tanks aft
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Purpose of aeration systems?
CHT |
Fans provide a constant flow of air to the holding tanks to kill anaerobic bacteria. The air from the tanks is vented over the side.
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Purpose of the sewage ejection pumps?
CHT |
Pumps waste from the holding tanks to either the risers or overboard.
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Purpose of the diverter valves?
CHT |
Multi-position valves used to align the flow of waste from holding tanks to either the risers or overboard.
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Deck discharge connections?
CHT |
There are 4 risers located fwd and aft on both port and stbd sponsons.
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Three modes of operation of the CHT system?
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Auto- pumps start when tank level reaches 60% and stops at 30%
Manual1 - pump will continually run regardless of tanks level Manual 2- pump will operate until tank level reaches 30% but will not re-start |
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safety precautions associated with sewage spill clean up?
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Clean up is accomplished by authorized personnel only. Protective clothing, "poopy suits" rubber gloves, and boots are worn. Spill is sanitized with betadine.
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Safety precautions associated with hydrogen sulfide gas?
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Sharp intense smell of rotten eggs. Area must be immediatly evacuated as fumes are toxic.
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Function and normal operation pressure of High Pressure Air System?
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Any air compressor that is discharges at a pressure greater then 1000 PSI is classified hp. When placed in automatic, our systems operate between 2800-3000 PSI. They are 5 stage, reciprocating, motor driven, oil free air compressors manufactured by Worthington.
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Function and normal operation pressure of Low Pressure Air System?
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Any air compressor that discharges at a pressure of 150 PSI or less is classified LP air. We maintain ship's service air pressure between 115-125 PSI. They are 2 stage, reciprocating, motor driven, oil free air compressors manufactured by RIX. A priority valve isolates ship service air automatically at 85 PSI to save LP air for control air. There is one for each LPAC.
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Purpose of the High Pressure Air Compressors (HPACs)?
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Located in the Engine Room, lower level, STBD side. HP air is primarily used to supply the EDG's with air to start, and also as an emergency source of control air for the engineering plant.
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Purpose of the Low Pressure Air Compressors (LPAC's)?
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LP is supplied throughout the ship for vital/non-vital systems such as pneumatic tools, laundry equipment, and control air. LP #2 is located in teh engine room, upper level STBD side, and LP's #1, 3, 4 on the lower level.
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Purpose of Air dehydrators?
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4 ships service air, 2 electronic dry air. Remove water/moisture from air that has been compressed. The four for ships service air cools the air by using chilled water. The moisture condenses and is blown out of the system. The two for electronic dry air uses desiccant beads to absorb moisture. All are located in the engine room, lower level.
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Purpose of HP to LP cross connect (HP to LP Reducer)?
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1. Reduces hp air pressure to 150 PSI and supplies the air to the LP air system.
2. Used only in an emergency to supply control air to the engineering planc if all four LPACS fail. |
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Purpose of the Reciever/air flask?
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1. Storage area for compressed air.
2. Provedes a smooth discharge of air by eliminating the slugging effect created by the reciprocating action of the compressor pistions. 3. LP air systems have receivers (1 for each LPAC, 1 in the fire room for control air) 4. HP air systems have flasks (1 for each HPAC, 2 for each EDG) |
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Purpose of degausing?
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Reduces the strength of the magnetic field of the ship.
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Function of the degausing control panel?
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Located at load center 21 it contains the switching and control circuits required for automatic and manual control of the degaussing current output of the "fl-ql", "fp-qp", and the "M" and "A" coil power supplies.
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Function of the degausing remote control panel?
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Located in the chart house it contains circuitry necessary for monitoring the system operation and for the manually controlling the "FI-QI" and "A" coils from a location that is remote from the control panel.
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Purpose of the Degaussing power supply units?
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Produces a reversible 5 VDC control signal for each coil channel control circuit.
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M coil?
Degaussing |
The principle degausing coil, called the main coil. It encircles the ship, inside the skin of the hull, in a horizontal plane approximately at the waterline. The M-coil compensates for the ship's vertical permanent and induced magnetism. The M-coil current is changed with changes in the lattitude.
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FP-QL coil?
Degaussing |
Located at opposite ends of the ship in horizontal planes and are connected in series. The FP loop encircles the foward part of the ship and is just beneath the forecastle or uppermost deck. the QP loop encircles the after part of the ship and is located just beneath the main or uppermost deck. The QP and FP loops are connected in series with each other, and usually have polarities in opposite directions. This coil compensates for the ship's permanent magnetization. The FP-QP coil currents are changed when it is determined that a change occurred in the ship's permanent magnetism. This determination is made at a degaussing station.
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FI-QI coil?
Degausing |
Located same as the FP-QP coil. the FI-QI coils develop strong fields below the bow and stern of the ship, to neutralize (approximately) the induced longitudinal magnetism at these points. The FI-QI coil currents change with changes in heading and latitude.
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A coil (ATHWART SHIP)?
Degausing |
the "A" coils run perpendicular to the waterline. They are located in various locations. The "A" coil has loops in the bertical fore-and-aft planes. Its funtion is to produce a magnetic field that will counteract the magnetic field produced by the ship's athwart ship permanent and induced magentization.
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L coil (LONGITUDINAL)?
Degausing |
Consists of loops in vertical planes, parallel to the frames of the ship. Always used when compensation for the pitch of the ship is required. It counteracts the magnetic field produced by the ships longitudinal permanent and induced magnetization.
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State the type and function of the diesel engine?
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We have 2 in-line Fairbanks-Morse 38 D8- 1-1/8th type, 6 cylinder, opposed piston diesel engines connected to generators that provedes:
1200 amps 450 volts 750 KW power each in the event that normal pwer (ship or shore) is lost 3 phase 60 HZ |
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Function of the intake air system?
EDG |
This air is used for combustion and to purge exhaust gasses from the cylinders. Supplies air, through an intake air filter, to the blower then to the air box compartment of the engine then distributed to the cylinders.
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Function of the fuel system of an emergency diesel generator?
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Proviedes fuel to the engine for combustion. F-44 (jp5) is gravity fed from the day tank to the fuel ipl pump, which delivers fuel to the injection pump. The injection pump delivers fuel to the nozzles, which sprays fuel into the cylinders.
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Function of the lube oil sytem of an emergency diesel generator?
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Provides oil for lubrication of carious internal moving parts. The lube oil pump to a strainer delivers lube oil in the engine pump, then to the lube oil cooler, then through a filter. The oil is then distributed to the parts that require lubrication. The engine pump capacity is 110 gallons and the oil is type 9250.
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Function of the Governor System of an emergency diesel generator?
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The diesel engines governor is a speed control device that maintains the engine speed at a constant 900 rmp for 60 HZ output.
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Function of the jacket cooling water system of an emergency diesel generator?
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Cools the diesel engine and prevent it from overheating under normal operating conditions. Jacket water is also the cooling medium for lube oil. Seawater cools the jacket water in the jacket water cooler. Jacket water is distilled water treated with MIL-53009 inhibitor, which prevents scale build-up inside the engine, jacket water cooler and all associated piping.
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Function of the start air system of a emergency diesel generator?
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Delivers a large volume of a hp air reduced to 250 PSI to start the diesel engines automatically by electric solenoid or manually by hand operated pressure relief valve.
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What is the cycle of operation of an emergancy diesel generator?
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When power is lost, high pressure air (2250-3000 PSI) passes through a reducer and delivers a large volume of air to the starter at 250 PSI which rotates the engine. Air is injected to each cylinder through ports and is then compressed by the upper and lower pistions which also raises the temperature of the air. A fuel injection nozzle injects atomized (fine spray) fuel into the high temerature compressed air and combustion occures, starting the engine. The pistions are connected to the crank shaft. As the gasses expand the pistions seperate thus turning the crank shaft. As the ports are open again fresh air purges and replaces the exhaust gasses from the cylinders.
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What are the four cycles of operation of an emergancy diesel generator?
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1.Intake (suck)
2.Compression (squeeze) 3.Combustion (bang) 4.Exhaust (blow) |
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What are the dutys and responsibilities of the Engineering Officer?
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Engineering department head
Damage control officer Plant control officer - personally supervises the EOOW up getting underway, coming to anchorage, and at other times when extra care is required. Ensures ETT/DCTT teams are qualified and effective. |
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What are the dutys and responsibilities of the Main Propulsion Assistant?
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Responsible under the engineering officer.
Plant control officer- in absence of the CHENG Responsible for proper care, stowage, and use of fuels and lubrication oils, the operational maintenance, and security of lubricating oil systems, the keeping of lube oil and fuel oil records superrvises the preparation and care of the engineering log, and engineering bell book. |
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What are the dutys and responsibilities of the Damage Control Assistant?
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-Repair division officer
-Gas free engineer -Prevent and control battle damage, including control of stability, list, and trim -Prepare and maintain bills for the control of damage, stability and readiness. -Ensure CCOL's are current and properly posted. -Administer overall damage control PQS program. --Provide training and supervises the qualification of gas free petty officers, fire marshals, members of all emergency parties (flying squad, rescue and assistance, aviation fire fighting --Provide training for divisional damage control maintenance -Conduct DCTT training as per XO's guidance |
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What are the dutys and responsibilities of the Electrical Officer?
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-Electrical division officer
-Electrical safety officer -Ensure proper procedure and safe operation of equipment assigned. -Ensure electrical deficiencies are corrected as required -Supervise training and qualifications of electrical supervisors and electrical switchboard operators, tool room custodians -Responsible for the casualty power bill and associated power training |
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What are the dutys and responsibilities of the Auxiliary Officer?
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-Auxiliary division officer
-Responsible for small boats -Responsible fore diesel jacket water and ADETA programs |
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State the types of fuels onboard and their uses
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F-76 (DFM)
Used for boilers F-44 (JP-5) Primarily used for aircraft. Used also for diesel engine, and is also an acceptable substitute for DFM. |
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State the purpose of the following F-76 major system components: F/O service system
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Fire safe duplex F/O strainers (NOT USED ON THE MTW)
We have 2 SIMPLEX strainers (helix) that filter out sediment from fuel being pumped to the boilers Fuel oil service pump (FOSP) Pump fuel from service tanks to the boilers Service pumps (1A, 1B, 1C) all electric drive, two speed, rotary pumps 1A, 1B - low speed 27 GPM 1C - high speed 51 GPM @ 350 PSI (in port use) |
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What makes up the F/O transfer system?
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F/O transfer pump
Transfer fuel from storage tanks to other storage tanks or to service tanks 4 (1 fwd pump room, 3 fire room) electric drive, two speed, rotary pumps Low 250 GPM High 500 GPM @ 150 PSI |
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What is the purpose of the F/O stripping system?
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Removes contaminants from the bottom of the fuel tanks
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What is the F/O stripping pump?
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Stripping pump is a steam driven, reciprocating pump. 100 GPM @ 30 PSI
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What is the purpose of the JP5 service pump?
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To deliver JP-5 to the flight deck hose reel
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What is the purpose of the JP5 filter separator?
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Removes sediment and water from JP-5 prior to refueling helicopters
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What is the ships maximum capacity for F-76 and JP-5?
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DFM (F-76) - 877,460 gallons
JP5 (F-44) - 117,794 |
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Explain the function of the gyrocompass.
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Its a passive shipboard navigation system which will automatically and continuously calculate and indicate ship's position, altitude, heading and velocity in relation to the the earths rotation.
Inertial Navigation System (INS) Ring Laser Gyro Navigation (RLGN) |
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State the function and location of the master gyrocompass
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MTW has two fully independent, selfcontained INS cabinets located in FWD IC and another in AFT IC. The system is capable of worldwide operation without the need for external position reference information for prolonged periods of time. During mission performance, the INS will not be susceptible to jamming or detection by enemy forces.
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What is the funcion of the synchro signal amplifiers?
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Amplifies course heading data from the gyro and transmits them to the slave units to coincide with the master unit. It has a critical bus supplies data to the helm, aft steering, and aft gyro.
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State the function of alarms and enunciators as it protains to the gyrocompass
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It provides a visual and audible indication of problems within the gyrocompass system. Also monitors ships 115 volts 60 HZ and 400 HZ power provided to gyrocompass system. 2 IC/SM alarm panels (fwd & aft) monitor gyrocompass as well as synchro signal amplifiers.
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What is the purpose of the main Lube Oil (LIO) system?
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To provide oil for heat removal and lubrication to bearings and gears in the main engine and reduction gears.
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What is the function of Lube Oil Service Pumps (LOSP)?
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Attached lube oil pump (ALOP) - 430 gpm. Geared to the main reduction gear delivers enough oil to the main engine when the shaft is turning at 94 rpms or greater. Standby lube oil pump (SLOP) - 400 GP<. Turbine driven, delivers oil to the main engine when the shaft is turning less then 94 PRMs or stopped. Can be used as long as steam is available for the turbine. Emergency lube oil pump (ELOP) 275 gpm. Motor driven, used when shaft speed is not fast enough for the ALOP, during light-off and securing, normally used as the standby for the SLOP
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What is the function of the L/O cooler?
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Classified as single pass, shell and tube heat exchanger. Uses seawater to remove heat from the lube oil that has left the bearings and gears. L/O cooler outlet temp is maintained between 120-130 degrees. (outlet temp) Seawater pressure is 6-8 PSI; L/O pressure is 12 - 14 PSI so if a leak develops in a tube the oil will leak into the seawater and not the opposite Periodic water samples are taken to check for oil.
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What is the function of the L/O strainer?
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Made from a fine metal mesh screen, removes participate matter from oil. Duplex strainer has two baskets. While one is being used, the other can be cleaned and inspected. Magnets in the basket trap metal particles that can indicate problems in bearins or gears.
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What is the function of the L/O purifier?
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Used to remove both water and sediment from lube oil. We have one disk type, delaval purifier. Uses centrifugal force to remove sediment and water from the lube oil. When the main source of contamination is sediment, the purifier is said to be a clarifier. When the main source of contamination is water, the purifier is said to be a separator.
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What is the function and capicity of the L/O storage and settling tanks?
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3 (A,B,C) 760 gallons capacity each. Used to store good clean oil. (2190TEP) that is ready for use in main and auxiliary equipment. Settling - 2 (A,B) 788 gallon capacity each. Used to hold contaminated oil until it can be prepared to be purified. Normally done while in port, the oil is heated to help allow gravity to pull water and sediment to the bottom of the tank. The oil is then sent to the purifier to remove the rest of the contaminants. Next, the oil can be pumped to sumps or to a storage tank.
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What is the make and purpose of the high pressure (hp) turbine?
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Made by General Electric, the HP turbine is an 8 stage impulse turbine.
The energy in main steam in converted into mechanical energy (high wpeed, low torque rotation) which is applied to the reduction gears. Main steam is supplied to the J3P turbine in the ahead direction only then is exhausted to the LP turbine. |
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What is the make and purpose of the low pressure (LP) turbine.
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Made by General Electric, the LP turbine is an 8 stage (7ahead, 1 astern) impulse turbine. Energy in main steam is converted in the same manner as the HP turbine and applied to the reduction gears. In the ahead direction, main steam exhausted by the HP turbine is directed to the LP turbine via a crossover pipe then is exhausted to the main condenser. In the astern direction, main steam is directed to the one stage of astern elecments located on the fwd end of the LP turbine then exhausts to the main condenser.
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What is the purpose of the main condenser of the propulsion turbine?
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Tlo condense the steam exhausted by the LP turbine back into water (condensate). The cooling medium is seawater provided by either scoop injection or the main circulating pump. Seawater goes through tubes while steam goes around the tube.
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What is the purpose of the main circulating pump of the propulsion turbine?
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A steam driven (600 aux) propeller type pump used to provide seawater (22,000 gpm max) to the main condenser when the forward speed of the ship is below 8 knots. In case of major uncontrollable flooding, the main circulation pump can take a suction from the bilge to de-water the space at a maximum rate of 5,000 gpm.
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What is the purpose of the guardian valves as it relates to the propulsion turbine?
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Valves used to isolate main steam from both hp and lp turbines prior to the throttle valves. In an emergency (k-jammed ahead throttle) the ahead guarding valve can be used to control the forward speed of the ship, below the speed when the throttle jammed.
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What is the purpose of the ahead throttle valve as it relates to the propulsion turbine?
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A remote hand wheel located in the EOS and connected to the hp turbine via metal rods and gear boxed and knuckles. The ahead throttle valve operates the beam which controls the amount of main steam admitted to the hp turbine.
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What is the purpose of the astern throttle valve as it relates to the propulsion turbine?
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A remote hand wheel located in the eos connects to the ahead throttle valve which control the ammount of main steam admitted to the astern elements of the LP turbine.
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What is the purpose of the thrust bearings as it relates to the propulsion turbine?
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In the main engine, thrust bearings prevent axial (for and aft) movement of the turbine rotors. On the shaft, a Kingsbury type thrust prevents axial movement of the shaft and transmits the thrust developed by the screw to the hull moving the ship either forward or aft.
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