[Bilge/Ballast Systems] Flashcards
What are the two functions of the bilge/ballast pump?
1) Bilge drainage
2) Vessel stability
What are the major components of the bilge/ballast pump subsystem?
1) Centrifugal pump
2) Alternating current motor
3) Motor adapter
What maintains HFW pressure required for the gaylord hood system?
Booster pump
What provides water to the bilge/ballast system from the sea chest and transfers it through the piping to the seven ballast tanks as controlled by valve alignment?
Bilge/ballast pump
List the characteristics of the oil-water separator (OWS)
1) Single-stage coalescer chambers with cleanable plates
2) Oil content monitor to monitor purity of discharge water prior to overboard discharge
3) Water polisher for use when OWS fails to meet federal regulations
Where are the ballast tanks? How many are there?
3 forward
2 midships
2 aft
List bilge/ballast pump capabilities and features
1) Can operate from one of two pump assemblies
2) Controlled from the pump or engineering control center
3) Transfers water to seven ballast tanks to provide vessel stability
4) Provides for bilge drainage
What sense the pressure of the OWS system and shut down the system when the pressure is either too high or too low?
Pressure switches
What provide an increase in HFW temperature for use in the galley?
Two booster heaters
List the capabilities and features of the oil-water separator (OWS)
1) Processes 10 gallons per minute of oily waste water
2) Two-position switch to monitor 15 PPM or 70 PPM limits ARMY USES 15 PPM
What displays the current oil content of the processed water, provides a means to change PPM alarm settings from 15 to 70, and an audio/visual alarm when the PPM set point is exceeded?
Remote Alarm Assembly
What valves are controlled by the OWS control panel to open and close depending on the signals from the oil/air and oil/water sensors?
The valves close on shutdown
Motorized valves
What consists of four OWS system gauges and one OCM system gauge for purge water pressure, OCM inlet pressure, OWS outlet pressure, strainer inlet and outlet pressures?
Gauge panel
Where is the oil-water separator (OWS) located?
Aft of the EOS, near centerline, under the engine room ladder
How is the bilge/ballast pump pressurized?
By a close coupled electric pump
What and where is the water polisher?
Consists of a housing with 9 filters stacked 3 high and 3 wide and located between the separator tank and the OWS pump
What removes non-liquid objects from the oily waste water from sludge tank?
Duplex strainer
What holds seawater and is in the vessel’s hull bottom?
Sea chest
What is set to shutdown the OWS if either the pressure (15 PSI) or vacuum (16 in. Hg) in the separator tank is reached?
Compound gauge
Multi-use pump used for oil-water separation to pump oily waste water from bilges and other areas to the sludge tank; to pump bulk oil from machinery to the dirty oil tank; and to pump from the dirty oil tank to shore discharge facilities
Dirty oil pump
What serves as an auxiliary bilge/ballast pump?
One of two fire pumps
Where the physical separation occurs when the oil from the water is attracted to the coalescing plates and floats to the top of the tank and into the oil tower
Separator tank
List bilge/ballast pump characteristics
1) Motor driven, electric - 40hp
2) Pump, centrifugal - 750 gpm at 150 PSI
What consists of three electrodes and shuts down the system if the separator floods with oil or air?
Oil/air sensor
What is located in the water discharge piping from the OWS pump to give the operator an indication of system flow and quality?
Sight glass
What means a mixture with any oil content, including bilge slops, oil residues (sludge), oily ballast water, and washings from cargo oil tanks?
“Oily waste” or “oily mixture”
What means an iridescent appearance on the surface of water?
Sheen
What is a device that is designed to prevent the overboard discharge of treated or untreated sewage, or any waste derived from sewage?
Type III Marine Sanitation Device
What is the condition resulting from the presence of chemical, mineral, radioactive, or biological substances that alter the natural environment or adversely affect human health or the quality of life, biosystems, the environment, structures and equipment, recreational opportunities, aesthetics, and/or natural beauty?
Pollution
Where is the bilge/ballast pump located on the LCU-2000?
Main engine room
What controls the directional output of effluent from the OWS by measuring the oil concentration in the processed water?
Oil content monitor (OCM)
What contains 3 rows of filters stacked 3 high which further aids in removal of oil from the processed water to attain parts per million setting or less?
Water polisher
What heats the CFW supply and maintains its setpoint temperature?
Hot water heater
What are the two modes on the OWS control panel?
1) HAND - used to operate for troubleshooting purposes and for maintenance functions
2) AUTO - normal mode used for processing oily waste water from the sludge tank
What draws suction from the separator tank, and moves the water to overboard discharge or back to the sludge tank?
OWS pump
What connects the SDA, remote alarm assembly, audible alarm, and OWS system at the control panel
Remote display
How often must the SDA, printed circuit board, and elapsed timer be replaced as a set?
Every 2 years or 2,000 hours, whichever occurs first
Where are the pipe-mounted strainers for the bilge/ballast pump located?
Lowest accessible point in the bilges of the engine room, auxiliary machinery room, bow thruster machinery room, and tunnel
What valve reduces pressure to the OWS system?
Pressure-reducing valve
What samples the processed discharge from the water polisher or OWS (if water polisher is bypassed) and controls the operation of the OWS system?
OCM Sensor detection assembly (SDA)
What means human body wastes and the wastes from toilets and other receptacles intended to receive or retain body wastes?
Sewage
What sends a tank level signal to the gauge board in the engine room which indicates each FW tank level?
Tank Level Indicator (TLI)
What and where is the separator tank?
Houses the coalescer plates and is located in the engine room starboard side aft of the EOS
